482778 - tight for loop causes minefield to hang

Status: RESOLVED WORKSFORME

(Core :: JavaScript Engine, defect)

Description

[Brad Lassey [:blassey] (use needinfo?)]

Attachment: test case

I was trying to generate a test case to pop up the slow script dialog and ended up hanging the browser.  To reproduce, just load the attached test case in Minefield.

Here's a stack trace (from dougt):
  User stack:
    35 start + 41 (in firefox-bin) [0x1d25]
      35 __start + 209 (in firefox-bin) [0x1df7]
        35 _main + 709 (in firefox-bin) [0x27cb]
          35 _XRE_main + 14008 (in XUL) [0xa89b6]
            35 __ZN12nsAppStartup3RunEv + 148 (in libtoolkitcomps.dylib) [0x14d76f32]
              35 __ZN10nsAppShell3RunEv + 288 (in libwidget_mac.dylib) [0x15058d1c]
                35 -[NSApplication run] + 795 (in AppKit) [0x93b3a66b]
                  35 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 128 (in AppKit) [0x93b41630]
                    35 __DPSNextEvent + 657 (in AppKit) [0x93b41d7d]
                      35 _BlockUntilNextEventMatchingListInMode + 106 (in HIToolbox) [0x92a52f4d]
                        35 _ReceiveNextEventCommon + 175 (in HIToolbox) [0x92a53012]
                          35 _RunCurrentEventLoopInMode + 283 (in HIToolbox) [0x92a532c0]
                            35 _CFRunLoopRunInMode + 88 (in CoreFoundation) [0x953f8cd8]
                              35 _CFRunLoopRunSpecific + 3141 (in CoreFoundation) [0x953f85f5]
                                35 __ZN10nsAppShell18ProcessGeckoEventsEPv + 518 (in libwidget_mac.dylib) [0x1505a478]
                                  35 __ZN14nsBaseAppShell19NativeEventCallbackEv + 181 (in libwidget_mac.dylib) [0x150a3f37]
                                    35 __Z25NS_ProcessPendingEvents_PP9nsIThreadj + 146 (in libxpcom_core.dylib) [0x4b23b6]
                                      35 __ZN8nsThread16ProcessNextEventEiPi + 676 (in libxpcom_core.dylib) [0x529652]
                                        35 __ZN23nsInputStreamReadyEvent3RunEv + 100 (in libxpcom_core.dylib) [0x4f6a7a]
                                          35 __ZN17nsInputStreamPump18OnInputStreamReadyEP19nsIAsyncInputStream + 138 (in libnecko.dylib) [0x14111750]
                                            35 __ZN17nsInputStreamPump15OnStateTransferEv + 777 (in libnecko.dylib) [0x141111ff]
                                              35 __ZN13nsHttpChannel15OnDataAvailableEP10nsIRequestP11nsISupportsP14nsIInputStreamjj + 844 (in libnecko.dylib) [0x141ea256]
                                                35 __ZN19nsStreamListenerTee15OnDataAvailableEP10nsIRequestP11nsISupportsP14nsIInputStreamjj + 624 (in libnecko.dylib) [0x14145c84]
                                                  35 __ZN18nsDocumentOpenInfo15OnDataAvailableEP10nsIRequestP11nsISupportsP14nsIInputStreamjj + 99 (in libdocshell.dylib) [0x1211f065]
                                                    35 __ZN8nsParser15OnDataAvailableEP10nsIRequestP11nsISupportsP14nsIInputStreamjj + 774 (in libhtmlpars.dylib) [0x13e39818]
                                                      35 __ZN8nsParser11ResumeParseEiii + 573 (in libhtmlpars.dylib) [0x13e39fb7]
                                                        35 __ZN8nsParser10BuildModelEv + 291 (in libhtmlpars.dylib) [0x13e35c85]
                                                          35 __ZN7CNavDTD10BuildModelEP9nsIParserP12nsITokenizerP16nsITokenObserverP14nsIContentSink + 938 (in libhtmlpars.dylib) [0x13e2324a]
                                                            35 __ZN7CNavDTD11HandleTokenEP6CTokenP9nsIParser + 1744 (in libhtmlpars.dylib) [0x13e29b80]
                                                              35 __ZN7CNavDTD14HandleEndTokenEP6CToken + 910 (in libhtmlpars.dylib) [0x13e26cb8]
                                                                35 __ZN7CNavDTD14CloseContainerE9nsHTMLTagi + 626 (in libhtmlpars.dylib) [0x13e25ed8]
                                                                  35 ??? [0x12a2e019]
                                                                    35 ??? [0x12a2db5b]
                                                                      35 ??? [0x12a2c335]
                                                                        35 ??? [0x129fb27b]
                                                                          35 ??? [0x129fbfc7]
                                                                            35 ??? [0x12923c44]
                                                                              35 ??? [0x12928602]
                                                                                35 ??? [0x12927368]
                                                                                  35 ??? [0x129270fe]
                                                                                    35 ??? [0x12b51c85]
                                                                                      35 _JS_EvaluateUCScriptForPrincipals + 327 (in libmozjs.dylib) [0x26543f]
                                                                                        34 _js_Execute + 807 (in libmozjs.dylib) [0x2d9693]
                                                                                          31 _js_Interpret + 93502 (in libmozjs.dylib) [0x2c7e4e]
                                                                                            29 _js_Invoke + 2325 (in libmozjs.dylib) [0x2dac33]
                                                                                              26 __Z17XPC_WN_CallMethodP9JSContextP8JSObjectjPlS3_ + 401 (in libxpconnect.dylib) [0x152082d1]
                                                                                                21 __ZN16XPCWrappedNative10CallMethodER14XPCCallContextNS_8CallModeE + 6237 (in libxpconnect.dylib) [0x151fd5a7]
                                                                                                  21 _NS_InvokeByIndex_P + 99 (in libxpcom_core.dylib) [0x544909]
                                                                                                    21 ??? [0x12a3a859]
                                                                                                      19 ??? [0x12a3a691]
                                                                                                        18 ??? [0x12a3a384]
                                                                                                          11 __ZN8nsParser5ParseERK18nsAString_internalPvRK19nsACString_internali9nsDTDMode + 1142 (in libhtmlpars.dylib) [0x13e3a76e]
                                                                                                            5 __ZN8nsParser11ResumeParseEiii + 573 (in libhtmlpars.dylib) [0x13e39fb7]
                                                                                                              5 __ZN8nsParser10BuildModelEv + 291 (in libhtmlpars.dylib) [0x13e35c85]
                                                                                                                2 __ZN7CNavDTD10BuildModelEP9nsIParserP12nsITokenizerP16nsITokenObserverP14nsIContentSink + 938 (in libhtmlpars.dylib) [0x13e2324a]
                                                                                                                  2 __ZN7CNavDTD11HandleTokenEP6CTokenP9nsIParser + 1718 (in libhtmlpars.dylib) [0x13e29b66]
                                                                                                                    2 __ZN7CNavDTD16HandleStartTokenEP6CToken + 1155 (in libhtmlpars.dylib) [0x13e29445]
                                                                                                                      1 __ZN7CNavDTD7AddLeafEPK13nsIParserNode + 68 (in libhtmlpars.dylib) [0x13e268f0]
                                                                                                                      1 __ZN7CNavDTD23HandleDefaultStartTokenEP6CToken9nsHTMLTagP13nsCParserNode + 1395 (in libhtmlpars.dylib) [0x13e28273]
                                                                                                                        1 __ZN7CNavDTD7AddLeafEPK13nsIParserNode + 118 (in libhtmlpars.dylib) [0x13e26922]
                                                                                                                          1 ??? [0x12a327d1]
                                                                                                                            1 ??? [0x12a2f9ac]
                                                                                                                              1 ??? [0x12a2e131]
                                                                                                                                1 ??? [0x12888ef4]
                                                                                                                2 __ZN7CNavDTD10BuildModelEP9nsIParserP12nsITokenizerP16nsITokenObserverP14nsIContentSink + 969 (in libhtmlpars.dylib) [0x13e23269]
                                                                                                                  1 ??? [0x12874722]
                                                                                                                  1 ??? [0x128746e7]
                                                                                                                1 __ZN7CNavDTD11HandleTokenEP6CTokenP9nsIParser + 1710 (in libhtmlpars.dylib) [0x13e29b5e]
                                                                                                            5 __ZN8nsParser11ResumeParseEiii + 537 (in libhtmlpars.dylib) [0x13e39f93]
                                                                                                              2 __ZN8nsParser8TokenizeEi + 406 (in libhtmlpars.dylib) [0x13e3842c]
                                                                                                                1 __ZN15nsHTMLTokenizer11ConsumeTextERP6CTokenR9nsScanner + 126 (in libhtmlpars.dylib) [0x13e16f3a]
                                                                                                                1 __ZN15nsHTMLTokenizer12ConsumeTokenER9nsScannerRi + 325 (in libhtmlpars.dylib) [0x13e18843]
                                                                                                                  1 __ZN15nsHTMLTokenizer11ConsumeTextERP6CTokenR9nsScanner + 123 (in libhtmlpars.dylib) [0x13e16f37]
                                                                                                                    1 __ZneRK17nsScannerIteratorS1_ + 0 (in libhtmlpars.dylib) [0x13e11a66]
                                                                                                              2 __ZN8nsParser8TokenizeEi + 143 (in libhtmlpars.dylib) [0x13e38325]
                                                                                                                1 __ZN14CParserContext12GetTokenizerEiP14nsIContentSinkRP12nsITokenizer + 92 (in libhtmlpars.dylib) [0x13e40008]
                                                                                                                  1 __ZN8nsCOMPtrI18nsIHTMLContentSinkEC1E16nsQueryInterface + 50 (in libhtmlpars.dylib) [0x13e2a6ae]
                                                                                                                    1 __ZN8nsCOMPtrI18nsIHTMLContentSinkE14assign_from_qiE16nsQueryInterfaceRK4nsID + 20 (in libhtmlpars.dylib) [0x13e2a654]
                                                                                                                      1 __ZNK16nsQueryInterfaceclERK4nsIDPPv + 57 (in libxpcom_core.dylib) [0x4a891f]
                                                                                                                        1 ??? [0x12a2a2b3]
                                                                                                                          1 ??? [0x12a2a2ff]
                                                                                                                1 __ZN14CParserContext12GetTokenizerEiP14nsIContentSinkRP12nsITokenizer + 424 (in libhtmlpars.dylib) [0x13e40154]
                                                                                                                  1 __ZN8nsCOMPtrI18nsIHTMLContentSinkED1Ev + 66 (in libhtmlpars.dylib) [0x13e2a1fc]
                                                                                                                    1 ??? [0x12a2a352]
                                                                                                                      1 ??? [0x12791b07]
                                                                                                              1 __ZN8nsParser8TokenizeEi + 512 (in libhtmlpars.dylib) [0x13e38496]
                                                                                                                1 __ZN15nsHTMLTokenizer16ScanDocStructureEi + 1 (in libhtmlpars.dylib) [0x13e16843]
                                                                                                            1 __ZN8nsParser11ResumeParseEiii + 1146 (in libhtmlpars.dylib) [0x13e3a1f4]
                                                                                                              1 __ZN15nsHTMLTokenizer7ReleaseEv + 1 (in libhtmlpars.dylib) [0x13e15f45]
                                                                                                          2 __ZN8nsParser5ParseERK18nsAString_internalPvRK19nsACString_internali9nsDTDMode + 353 (in libhtmlpars.dylib) [0x13e3a459]
                                                                                                            2 __ZN9nsScannerC1ERK18nsAString_internalRK19nsACString_internali + 200 (in libhtmlpars.dylib) [0x13e458a4]
                                                                                                              1 __ZN9nsScanner14AppendToBufferERK18nsAString_internal + 69 (in libhtmlpars.dylib) [0x13e45c45]
                                                                                                                1 __ZN17nsScannerIterator17normalize_forwardEv + 1 (in libhtmlpars.dylib) [0x13e11815]
                                                                                                              1 __ZN9nsScanner14AppendToBufferERK18nsAString_internal + 17 (in libhtmlpars.dylib) [0x13e45c11]
                                                                                                                1 __ZN19nsScannerBufferList21AllocBufferFromStringERK18nsAString_internal + 103 (in libhtmlpars.dylib) [0x13e10003]
                                                                                                          2 __ZN8nsParser5ParseERK18nsAString_internalPvRK19nsACString_internali9nsDTDMode + 1100 (in libhtmlpars.dylib) [0x13e3a744]
                                                                                                            2 __ZN9nsScanner6AppendERK18nsAString_internal + 24 (in libhtmlpars.dylib) [0x13e44df4]
                                                                                                              1 __ZNK18nsScannerSubstring12BeginReadingER17nsScannerIterator + 0 (in libhtmlpars.dylib) [0x13e0fe6a]
                                                                                                              1 __ZN9nsScanner14AppendToBufferERK18nsAString_internal + 69 (in libhtmlpars.dylib) [0x13e45c45]
                                                                                                                1 __ZN9nsScanner14AppendToBufferEPN19nsScannerBufferList6BufferEP10nsIRequesti + 441 (in libhtmlpars.dylib) [0x13e44c91]
                                                                                                                  1 __ZNK18nsScannerSubstring12BeginReadingER17nsScannerIterator + 110 (in libhtmlpars.dylib) [0x13e0fed8]
                                                                                                                    1 __ZNK18nsScannerSubstring15GetNextFragmentER17nsScannerFragment + 72 (in libhtmlpars.dylib) [0x13e0fd7a]
                                                                                                          1 __ZN14CParserContextD1Ev + 1 (in libhtmlpars.dylib) [0x13e3fd65]
                                                                                                          1 __ZN8nsParser5ParseERK18nsAString_internalPvRK19nsACString_internali9nsDTDMode + 182 (in libhtmlpars.dylib) [0x13e3a3ae]
                                                                                                            1 __ZN8nsCOMPtrI9nsIParserEC1EPS0_ + 45 (in libhtmlpars.dylib) [0x13e3f9d1]
                                                                                                              1 __ZN27nsCycleCollectingAutoRefCnt4incrEP11nsISupports + 145 (in libhtmlpars.dylib) [0x13e1eba9]
                                                                                                          1 __ZN8nsParser11ResumeParseEiii + 1111 (in libhtmlpars.dylib) [0x13e3a1d1]
                                                                                                        1 __ZN18nsAString_internal8TruncateEj + 1 (in libhtmlpars.dylib) [0x13e11341]
                                                                                                      2 ??? [0x12a3a600]
                                                                                                        2 _JS_ValueToString + 101 (in libmozjs.dylib) [0x252e31]
                                                                                                          2 _js_ValueToString + 179 (in libmozjs.dylib) [0x3465c1]
                                                                                                            2 _js_NumberToString + 44 (in libmozjs.dylib) [0x2e43c2]
                                                                                                              2 __Z22NumberToStringWithBaseP9JSContextdi + 107 (in libmozjs.dylib) [0x2e4367]
                                                                                                                1 _JS_NewStringCopyZ + 208 (in libmozjs.dylib) [0x265e86]
                                                                                                                  1 _js_NewString + 206 (in libmozjs.dylib) [0x342c9a]
                                                                                                                    1 _pthread_mutex_lock + 1 (in libSystem.B.dylib) [0x9448daad]
                                                                                                                1 _js_InflateString + 242 (in libmozjs.dylib) [0x34cc38]
                                                                                                4 __ZN16XPCWrappedNative10CallMethodER14XPCCallContextNS_8CallModeE + 974 (in libxpconnect.dylib) [0x151fc118]
                                                                                                  4 __ZN23nsScriptSecurityManager9CanAccessEjP23nsAXPCNativeCallContextP9JSContextP8JSObjectP11nsISupportsP12nsIClassInfolPPv + 89 (in libcaps.dylib) [0x1c80395]
                                                                                                    3 __ZN23nsScriptSecurityManager23CheckPropertyAccessImplEjP23nsAXPCNativeCallContextP9JSContextP8JSObjectP11nsISupportsP6nsIURIP12nsIClassInfoPKclPPv + 505 (in libcaps.dylib) [0x1c7fac7]
                                                                                                      3 __ZN23nsScriptSecurityManager20doGetObjectPrincipalEP8JSObjecti + 311 (in libcaps.dylib) [0x1c762f7]
                                                                                                        2 __ZNK16XPCWrappedNative18GetObjectPrincipalEv + 65 (in libxpconnect.dylib) [0x151ffd7f]
                                                                                                          2 __ZN8nsCOMPtrI24nsIScriptObjectPrincipalEC1E16nsQueryInterface + 50 (in libxpconnect.dylib) [0x151cfbea]
                                                                                                            2 __ZN8nsCOMPtrI24nsIScriptObjectPrincipalE14assign_from_qiE16nsQueryInterfaceRK4nsID + 20 (in libxpconnect.dylib) [0x151cfb5e]
                                                                                                              2 __ZNK16nsQueryInterfaceclERK4nsIDPPv + 57 (in libxpcom_core.dylib) [0x4a891f]
                                                                                                                2 ??? [0x12a37a6e]
                                                                                                                  2 ??? [0x128a7bbb]
                                                                                                                    2 __Z16NS_TableDrivenQIPvPK12QITableEntryRK4nsIDPS_ + 81 (in libxpcom_core.dylib) [0x4ac4f1]
                                                                                                                      2 ??? [0x12a378b2]
                                                                                                                        1 _pthread_getspecific + 0 (in libSystem.B.dylib) [0x94487264]
                                                                                                                        1 ??? [0x128a7e93]
                                                                                                                          1 ??? [0x12791aa5]
                                                                                                                            1 _NS_CycleCollectorForget_P + 48 (in libxpcom_core.dylib) [0x540d82]
                                                                                                                              1 __ZN16nsCycleCollector6ForgetEP11nsISupports + 136 (in libxpcom_core.dylib) [0x540d42]
                                                                                                                                1 __ZN14nsPurpleBuffer6RemoveEPv + 105 (in libxpcom_core.dylib) [0x542abf]
                                                                                                                                  1 __ZN15nsBaseHashtableI12nsPtrHashKeyIKvEjjE6RemoveEPS1_ + 24 (in libxpcom_core.dylib) [0x542a54]
                                                                                                                                    1 __ZN12nsTHashtableI17nsBaseHashtableETI12nsPtrHashKeyIKvEjEE11RemoveEntryEPS2_ + 102 (in libxpcom_core.dylib) [0x542a34]
                                                                                                                                      1 _SearchTable + 131 (in libxpcom_core.dylib) [0x4a42f9]
                                                                                                        1 __ZNK16XPCWrappedNative18GetObjectPrincipalEv + 33 (in libxpconnect.dylib) [0x151ffd5f]
                                                                                                          1 __ZNK21XPCWrappedNativeScope12GetPrincipalEv + 52 (in libxpconnect.dylib) [0x151b676a]
                                                                                                            1 ??? [0x12b67d33]
                                                                                                              1 ??? [0x12738706]
                                                                                                                1 ??? [0x12678db1]
                                                                                                    1 __ZN23nsScriptSecurityManager23CheckPropertyAccessImplEjP23nsAXPCNativeCallContextP9JSContextP8JSObjectP11nsISupportsP6nsIURIP12nsIClassInfoPKclPPv + 520 (in libcaps.dylib) [0x1c7fad6]
                                                                                                      1 __ZN8nsCOMPtrI12nsIPrincipalEaSEPS0_ + 35 (in libcaps.dylib) [0x1c8533b]
                                                                                                        1 __ZN8nsCOMPtrI12nsIPrincipalE20Assert_NoQueryNeededEv + 50 (in libcaps.dylib) [0x1c73d90]
                                                                                                          1 __ZN8nsCOMPtrI12nsIPrincipalEC1E16nsQueryInterface + 50 (in libcaps.dylib) [0x1c73d58]
                                                                                                            1 __ZN8nsCOMPtrI12nsIPrincipalE14assign_from_qiE16nsQueryInterfaceRK4nsID + 20 (in libcaps.dylib) [0x1c73cfe]
                                                                                                              1 __ZNK16nsQueryInterfaceclERK4nsIDPPv + 57 (in libxpcom_core.dylib) [0x4a891f]
                                                                                                                1 __ZN11nsPrincipal14QueryInterfaceERK4nsIDPPv + 271 (in libcaps.dylib) [0x1c6ad5d]
                                                                                                                  1 __PR_Darwin_x86_AtomicIncrement + 13 (in libnspr4.dylib) [0x1697ed]
                                                                                                1 __ZN16XPCWrappedNative10CallMethodER14XPCCallContextNS_8CallModeE + 270 (in libxpconnect.dylib) [0x151fbe58]
                                                                                                  1 __ZN17nsXPTCMiniVariantC2Ev + 6 (in libxpconnect.dylib) [0x151f19a0]
                                                                                              1 __ZN14XPCCallContextD1Ev + 370 (in libxpconnect.dylib) [0x151b9884]
                                                                                              1 __ZN17xptiInterfaceInfo13GetMethodInfoEtPPK15nsXPTMethodInfo + 1 (in libxpcom_core.dylib) [0x54caa3]
                                                                                              1 __ZN16XPCWrappedNative10CallMethodER14XPCCallContextNS_8CallModeE + 6263 (in libxpconnect.dylib) [0x151fd5c1]
                                                                                            1 __ZN14XPCCallContextC1EN10XPCContext8LangTypeEP9JSContextP8JSObjectS5_ljPlS6_ + 1 (in libxpconnect.dylib) [0x151b8dd5]
                                                                                            1 _js_Invoke + 1228 (in libmozjs.dylib) [0x2da7ea]
                                                                                              1 _js_ComputeThis + 62 (in libmozjs.dylib) [0x2d9022]
                                                                                                1 __Z11ComputeThisP9JSContextiPl + 277 (in libmozjs.dylib) [0x2d8fa3]
                                                                                                  1 _js_GetScopeChain + 1 (in libmozjs.dylib) [0x2d878b]
                                                                                          1 _js_Interpret + 97733 (in libmozjs.dylib) [0x2c8ed5]
                                                                                            1 _js_NativeGet + 561 (in libmozjs.dylib) [0x2f2587]
                                                                                              1 _js_GetSprop + 255 (in libmozjs.dylib) [0x2e71ed]
                                                                                                1 __Z25XPC_WN_Helper_GetPropertyP9JSContextP8JSObjectlPl + 191 (in libxpconnect.dylib) [0x15209add]
                                                                                                  1 ??? [0x12bb0aef]
                                                                                                    1 _JSVAL_TO_GCTHING + 1 (in libmozjs.dylib) [0x25266b]
                                                                                          1 ??? [0xffff1090]
                                                                                          1 _js_NativeGet + 110 (in libmozjs.dylib) [0x2f23c4]
                                                                                        1 _js_Interpret + 112359 (in libmozjs.dylib) [0x2cc7f7]
  Kernel stack:
    35 _PE_incoming_interrupt + 131 [0x449c0e]
      35 _lapic_interrupt + 107 [0x1af6f8]
        35 _sync_iss_to_iks + 114 [0x1a8f18]

  Thread id:      7351f20
  User stack:
    35 _thread_start + 34 (in libSystem.B.dylib) [0x944b6f52]
      35 __pthread_start + 321 (in libSystem.B.dylib) [0x944b7095]
        35 __pt_root + 314 (in libnspr4.dylib) [0x1631cf]
          35 __ZN12XPCJSRuntime12WatchdogMainEPv + 73 (in libxpconnect.dylib) [0x151e3339]
            35 _PR_WaitCondVar + 370 (in libnspr4.dylib) [0x15c15b]
              35 _pt_TimedWait + 243 (in libnspr4.dylib) [0x15bc40]
                35 _semaphore_timedwait_signal_trap + 10 (in libSystem.B.dylib) [0x94486226]

  Thread id:      747e5d0
  User stack:
    35 _thread_start + 34 (in libSystem.B.dylib) [0x944b6f52]
      35 __pthread_start + 321 (in libSystem.B.dylib) [0x944b7095]
        35 __pt_root + 314 (in libnspr4.dylib) [0x1631cf]
          35 __ZN8nsThread10ThreadFuncEPv + 263 (in libxpcom_core.dylib) [0x529861]
            35 __Z21NS_ProcessNextEvent_PP9nsIThreadi + 130 (in libxpcom_core.dylib) [0x4b2280]
              35 __ZN8nsThread16ProcessNextEventEiPi + 676 (in libxpcom_core.dylib) [0x529652]
                35 __ZN11TimerThread3RunEv + 719 (in libxpcom_core.dylib) [0x5317c7]
                  35 _PR_WaitCondVar + 370 (in libnspr4.dylib) [0x15c15b]
                    35 _pt_TimedWait + 243 (in libnspr4.dylib) [0x15bc40]
                      35 _semaphore_timedwait_signal_trap + 10 (in libSystem.B.dylib) [0x94486226]

  Thread id:      93af3c8
  User stack:
    35 _thread_start + 34 (in libSystem.B.dylib) [0x944b6f52]
      35 __pthread_start + 321 (in libSystem.B.dylib) [0x944b7095]
        35 __pt_root + 314 (in libnspr4.dylib) [0x1631cf]
          35 __ZN21nsPSMBackgroundThread14nsThreadRunnerEPv + 27 (in libpipnss.dylib) [0x14503067]
            35 __ZN11nsSSLThread3RunEv + 286 (in libpipnss.dylib) [0x14504c46]
              35 _PR_WaitCondVar + 333 (in libnspr4.dylib) [0x15c136]
                35 _semaphore_wait_signal_trap + 10 (in libSystem.B.dylib) [0x9448620e]

  Thread id:      7678c80
  User stack:
    35 _thread_start + 34 (in libSystem.B.dylib) [0x944b6f52]
      35 __pthread_start + 321 (in libSystem.B.dylib) [0x944b7095]
        35 __pt_root + 314 (in libnspr4.dylib) [0x1631cf]
          35 __ZN21nsPSMBackgroundThread14nsThreadRunnerEPv + 27 (in libpipnss.dylib) [0x14503067]
            35 __ZN24nsCertVerificationThread3RunEv + 72 (in libpipnss.dylib) [0x14505a38]
              35 _PR_WaitCondVar + 333 (in libnspr4.dylib) [0x15c136]
                35 _semaphore_wait_signal_trap + 10 (in libSystem.B.dylib) [0x9448620e]

  Thread id:      79725d0
  User stack:
    35 _thread_start + 34 (in libSystem.B.dylib) [0x944b6f52]
      35 __pthread_start + 321 (in libSystem.B.dylib) [0x944b7095]
        35 __pt_root + 314 (in libnspr4.dylib) [0x1631cf]
          35 __ZN8nsThread10ThreadFuncEPv + 263 (in libxpcom_core.dylib) [0x529861]
            35 __Z21NS_ProcessNextEvent_PP9nsIThreadi + 130 (in libxpcom_core.dylib) [0x4b2280]
              35 __ZN8nsThread16ProcessNextEventEiPi + 522 (in libxpcom_core.dylib) [0x5295b8]
                35 __ZN8nsThread19nsChainedEventQueue8GetEventEiPP11nsIRunnable + 34 (in libxpcom_core.dylib) [0x52a220]
                  35 __ZN12nsEventQueue8GetEventEiPP11nsIRunnable + 134 (in libxpcom_core.dylib) [0x527826]
                    35 __ZN13nsAutoMonitor4WaitEj + 27 (in libxpcom_core.dylib) [0x4f3f7f]
                      35 _PR_Wait + 265 (in libnspr4.dylib) [0x15c877]
                        35 _PR_WaitCondVar + 333 (in libnspr4.dylib) [0x15c136]
                          35 _semaphore_wait_signal_trap + 10 (in libSystem.B.dylib) [0x9448620e]

  Thread id:      903b7d8
  User stack:
    35 _thread_start + 34 (in libSystem.B.dylib) [0x944b6f52]
      35 __pthread_start + 321 (in libSystem.B.dylib) [0x944b7095]
        35 __pt_root + 314 (in libnspr4.dylib) [0x1631cf]
          35 __ZN8nsThread10ThreadFuncEPv + 263 (in libxpcom_core.dylib) [0x529861]
            35 __Z21NS_ProcessNextEvent_PP9nsIThreadi + 130 (in libxpcom_core.dylib) [0x4b2280]
              35 __ZN8nsThread16ProcessNextEventEiPi + 522 (in libxpcom_core.dylib) [0x5295b8]
                35 __ZN8nsThread19nsChainedEventQueue8GetEventEiPP11nsIRunnable + 34 (in libxpcom_core.dylib) [0x52a220]
                  35 __ZN12nsEventQueue8GetEventEiPP11nsIRunnable + 134 (in libxpcom_core.dylib) [0x527826]
                    35 __ZN13nsAutoMonitor4WaitEj + 27 (in libxpcom_core.dylib) [0x4f3f7f]
                      35 _PR_Wait + 265 (in libnspr4.dylib) [0x15c877]
                        35 _PR_WaitCondVar + 333 (in libnspr4.dylib) [0x15c136]
                          35 _semaphore_wait_signal_trap + 10 (in libSystem.B.dylib) [0x9448620e]

  Thread id:      8098d60
  User stack:
    35 _thread_start + 34 (in libSystem.B.dylib) [0x944b6f52]
      35 __pthread_start + 321 (in libSystem.B.dylib) [0x944b7095]
        35 __ZN9CAPThread5EntryEPS_ + 96 (in CoreAudio) [0x9270b464]
          35 __ZN10HALRunLoop9OwnThreadEPv + 160 (in CoreAudio) [0x9270b5dc]
            35 _CFRunLoopRunInMode + 88 (in CoreFoundation) [0x953f8cd8]
              35 _mach_msg_trap + 10 (in libSystem.B.dylib) [0x944861c6]

  Thread id:      945ac80
  User stack:
    35 _thread_start + 34 (in libSystem.B.dylib) [0x944b6f52]
      35 __pthread_start + 321 (in libSystem.B.dylib) [0x944b7095]
        35 _PrivateMPEntryPoint + 56 (in CarbonCore) [0x92d750a3]
          35 __ZN23TSystemNotificationTask26SystemNotificationTaskProcEPv + 123 (in DesktopServicesPriv) [0x90004e83]
            35 _CFRunLoopRun + 84 (in CoreFoundation) [0x953f8d34]
              35 _mach_msg_trap + 10 (in libSystem.B.dylib) [0x944861c6]

  Thread id:      945a8b8
  User stack:
    35 _thread_start + 34 (in libSystem.B.dylib) [0x944b6f52]
      35 __pthread_start + 321 (in libSystem.B.dylib) [0x944b7095]
        35 _PrivateMPEntryPoint + 56 (in CarbonCore) [0x92d750a3]
          35 __ZN25TFSEventsNotificationTask28FSEventsNotificationTaskProcEPv + 216 (in DesktopServicesPriv) [0x90004ffc]
            35 _CFRunLoopRun + 84 (in CoreFoundation) [0x953f8d34]
              35 _mach_msg_trap + 10 (in libSystem.B.dylib) [0x944861c6]

  Thread id:      7a282e8
  User stack:
    35 _thread_start + 34 (in libSystem.B.dylib) [0x944b6f52]
      35 __pthread_start + 321 (in libSystem.B.dylib) [0x944b7095]
        35 _PrivateMPEntryPoint + 56 (in CarbonCore) [0x92d750a3]
          35 __ZN13TNodeSyncTask12SyncTaskProcEPv + 84 (in DesktopServicesPriv) [0x9000ffba]
            35 _MPWaitOnQueue + 208 (in CarbonCore) [0x92d76b4c]
              35 _TSWaitOnConditionTimedRelative + 202 (in CarbonCore) [0x92d55da6]
                35 _TSWaitOnCondition + 126 (in CarbonCore) [0x92d76ecf]
                  35 ___semwait_signal + 10 (in libSystem.B.dylib) [0x9448d3ae]

  Thread id:      903a128
  User stack:
    35 _thread_start + 34 (in libSystem.B.dylib) [0x944b6f52]
      35 _kevent + 10 (in libSystem.B.dylib) [0x944b6906]

  Thread id:      9459d60
  User stack:
    35 _thread_start + 34 (in libSystem.B.dylib) [0x944b6f52]
      35 ___select + 10 (in libSystem.B.dylib) [0x944d56f2]

  Thread id:      7efbd60
  User stack:
    35 _thread_start + 34 (in libSystem.B.dylib) [0x944b6f52]
      35 __pthread_start + 321 (in libSystem.B.dylib) [0x944b7095]
        35 ___NSThread__main__ + 308 (in Foundation) [0x94e76394]
          35 -[NSThread main] + 45 (in Foundation) [0x94e767ed]
            35 -[NSUIHeartBeat _heartBeatThread:] + 753 (in AppKit) [0x93ba7d90]
              35 -[NSConditionLock lockWhenCondition:] + 69 (in Foundation) [0x94ebc4d5]
                35 -[NSConditionLock lockWhenCondition:beforeDate:] + 144 (in Foundation) [0x94ebc570]
                  35 -[NSCondition waitUntilDate:] + 236 (in Foundation) [0x94ebc75c]
                    35 _semaphore_timedwait_signal_trap + 10 (in libSystem.B.dylib) [0x94486226]

  Thread id:      7efd7d8
  User stack:
    35 _thread_start + 34 (in libSystem.B.dylib) [0x944b6f52]
      35 __pthread_start + 321 (in libSystem.B.dylib) [0x944b7095]
        35 __pt_root + 314 (in libnspr4.dylib) [0x1631cf]
          35 __ZN8nsThread10ThreadFuncEPv + 263 (in libxpcom_core.dylib) [0x529861]
            35 __Z21NS_ProcessNextEvent_PP9nsIThreadi + 130 (in libxpcom_core.dylib) [0x4b2280]
              35 __ZN8nsThread16ProcessNextEventEiPi + 676 (in libxpcom_core.dylib) [0x529652]
                35 __ZN24nsSocketTransportService3RunEv + 288 (in libnecko.dylib) [0x14142cc4]
                  35 __Z21NS_ProcessNextEvent_PP9nsIThreadi + 130 (in libxpcom_core.dylib) [0x4b2280]
                    35 __ZN8nsThread16ProcessNextEventEiPi + 416 (in libxpcom_core.dylib) [0x52954e]
                      35 __ZN24nsSocketTransportService18OnProcessNextEventEP17nsIThreadInternalij + 61 (in libnecko.dylib) [0x14143459]
                        35 __ZN24nsSocketTransportService15DoPollIterationEi + 788 (in libnecko.dylib) [0x14143156]
                          35 __ZN24nsSocketTransportService4PollEiPj + 222 (in libnecko.dylib) [0x14141abe]
                            35 _PR_Poll + 31 (in libnspr4.dylib) [0x161c59]
                              35 __pr_poll_with_poll + 1329 (in libnspr4.dylib) [0x1619ec]
                                35 _select$DARWIN_EXTSN$NOCANCEL + 10 (in libSystem.B.dylib) [0x944bd30a]

  Thread id:      10c22f20
  User stack:
    35 _thread_start + 34 (in libSystem.B.dylib) [0x944b6f52]
      35 __pthread_start + 321 (in libSystem.B.dylib) [0x944b7095]
        35 __pt_root + 314 (in libnspr4.dylib) [0x1631cf]
          35 __ZN14nsHostResolver10ThreadFuncEPv + 288 (in libnecko.dylib) [0x141581ca]
            35 __ZN14nsHostResolver15GetHostToLookupEPP12nsHostRecord + 363 (in libnecko.dylib) [0x14158031]
              35 _PR_WaitCondVar + 370 (in libnspr4.dylib) [0x15c15b]
                35 _pt_TimedWait + 243 (in libnspr4.dylib) [0x15bc40]
                  35 _semaphore_timedwait_signal_trap + 10 (in libSystem.B.dylib) [0x94486226]

  Thread id:      7974ba0
  User stack:
    35 _thread_start + 34 (in libSystem.B.dylib) [0x944b6f52]
      35 __pthread_start + 321 (in libSystem.B.dylib) [0x944b7095]
        35 __pt_root + 314 (in libnspr4.dylib) [0x1631cf]
          35 __ZN14nsHostResolver10ThreadFuncEPv + 288 (in libnecko.dylib) [0x141581ca]
            35 __ZN14nsHostResolver15GetHostToLookupEPP12nsHostRecord + 363 (in libnecko.dylib) [0x14158031]
              35 _PR_WaitCondVar + 370 (in libnspr4.dylib) [0x15c15b]
                35 _pt_TimedWait + 243 (in libnspr4.dylib) [0x15bc40]
                  35 _semaphore_timedwait_signal_trap + 10 (in libSystem.B.dylib) [0x94486226]

  Thread id:      7efc8b8
  User stack:
    35 _thread_start + 34 (in libSystem.B.dylib) [0x944b6f52]
      35 __pthread_start + 321 (in libSystem.B.dylib) [0x944b7095]
        35 _fe_fragment_thread + 54 (in QuartzCore) [0x95b49ab9]
          35 ___semwait_signal + 10 (in libSystem.B.dylib) [0x9448d3ae]

  Thread id:      7974048
  User stack:
    35 _thread_start + 34 (in libSystem.B.dylib) [0x944b6f52]
      35 __pthread_start + 321 (in libSystem.B.dylib) [0x944b7095]
        35 _QTSNetworkThread_RunThread + 131 (in QuickTime) [0x90f1b212]
          35 _CFRunLoopRun + 84 (in CoreFoundation) [0x953f8d34]
            35 _mach_msg_trap + 10 (in libSystem.B.dylib) [0x944861c6]

  Thread id:      9457b58
  User stack:
    35 _thread_start + 34 (in libSystem.B.dylib) [0x944b6f52]
      35 __pthread_start + 321 (in libSystem.B.dylib) [0x944b7095]
        35 ___NSThread__main__ + 308 (in Foundation) [0x94e76394]
          35 -[NSThread main] + 45 (in Foundation) [0x94e767ed]
            35 +[NSURLConnection(NSURLConnectionReallyInternal) _resourceLoadLoop:] + 320 (in Foundation) [0x94ed9d40]
              35 _CFRunLoopRunInMode + 88 (in CoreFoundation) [0x953f8cd8]
                35 _mach_msg_trap + 10 (in libSystem.B.dylib) [0x944861c6]

  Thread id:      8096f20
  User stack:
    35 _thread_start + 34 (in libSystem.B.dylib) [0x944b6f52]
      35 __pthread_start + 321 (in libSystem.B.dylib) [0x944b7095]
        35 __pt_root + 314 (in libnspr4.dylib) [0x1631cf]
          35 __ZN8nsThread10ThreadFuncEPv + 263 (in libxpcom_core.dylib) [0x529861]
            35 __Z21NS_ProcessNextEvent_PP9nsIThreadi + 130 (in libxpcom_core.dylib) [0x4b2280]
              35 __ZN8nsThread16ProcessNextEventEiPi + 522 (in libxpcom_core.dylib) [0x5295b8]
                35 __ZN8nsThread19nsChainedEventQueue8GetEventEiPP11nsIRunnable + 34 (in libxpcom_core.dylib) [0x52a220]
                  35 __ZN12nsEventQueue8GetEventEiPP11nsIRunnable + 134 (in libxpcom_core.dylib) [0x527826]
                    35 __ZN13nsAutoMonitor4WaitEj + 27 (in libxpcom_core.dylib) [0x4f3f7f]
                      35 _PR_Wait + 265 (in libnspr4.dylib) [0x15c877]
                        35 _PR_WaitCondVar + 333 (in libnspr4.dylib) [0x15c136]
                          35 _semaphore_wait_signal_trap + 10 (in libSystem.B.dylib) [0x9448620e]

  Thread id:      10c25c80
  User stack:
    35 _thread_start + 34 (in libSystem.B.dylib) [0x944b6f52]
      35 __pthread_start + 321 (in libSystem.B.dylib) [0x944b7095]
        35 _PrivateMPEntryPoint + 56 (in CarbonCore) [0x92d750a3]
          35 __ZN15TFolderSizeTask18FolderSizeTaskProcEPv + 104 (in DesktopServicesPriv) [0x90011f04]
            35 _MPWaitOnQueue + 208 (in CarbonCore) [0x92d76b4c]
              35 _TSWaitOnConditionTimedRelative + 246 (in CarbonCore) [0x92d55dd2]
                35 _semaphore_timedwait_signal_trap + 10 (in libSystem.B.dylib) [0x94486226]


Process:        ATSServer [188]
Path:           /System/Library/Frameworks/ApplicationServices.framework/Frameworks/ATS.framework/Support/ATSServer

  ADDRESS         BINARY
  00001000        /System/Library/Frameworks/ApplicationServices.framework/Frameworks/ATS.framework/Support/ATSServer

  Thread id:      7a2a8b8
  User stack:
    35 ??? [0x56f6]
      35 ??? [0xddb0f]
        35 _CFRunLoopRun + 84 (in CoreFoundation) [0x953f8d34]
          35 _mach_msg_trap + 10 (in libSystem.B.dylib) [0x944861c6]

  Thread id:      7677998
  User stack:
    35 _thread_start + 34 (in libSystem.B.dylib) [0x944b6f52]
      35 __pthread_start + 321 (in libSystem.B.dylib) [0x944b7095]
        35 _mach_msg_trap + 10 (in libSystem.B.dylib) [0x944861c6]


Process:        AirPort Base Station Agent [174]
Path:           /System/Library/CoreServices/AirPort Base Station Agent.app/Contents/MacOS/AirPort Base Station Agent

  ADDRESS         BINARY
  00001000        /System/Library/CoreServices/AirPort Base Station Agent.app/Contents/MacOS/AirPort Base Station Agent

  Thread id:      7678128
  User stack:
    35 ??? [0x23d1]
      35 ??? [0x24a4]
        35 _NSApplicationMain + 574 (in AppKit) [0x93b078a4]
          35 -[NSApplication run] + 795 (in AppKit) [0x93b3a66b]
            35 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 128 (in AppKit) [0x93b41630]
              35 __DPSNextEvent + 657 (in AppKit) [0x93b41d7d]
                35 _BlockUntilNextEventMatchingListInMode + 106 (in HIToolbox) [0x92a52f4d]
                  35 _ReceiveNextEventCommon + 374 (in HIToolbox) [0x92a530d9]
                    35 _RunCurrentEventLoopInMode + 283 (in HIToolbox) [0x92a532c0]
                      35 _CFRunLoopRunInMode + 88 (in CoreFoundation) [0x953f8cd8]
                        35 _mach_msg_trap + 10 (in libSystem.B.dylib) [0x944861c6]

  Thread id:      79712e8
  User stack:
    35 _thread_start + 34 (in libSystem.B.dylib) [0x944b6f52]
      35 ___select + 10 (in libSystem.B.dylib) [0x944d56f2]

  Thread id:      79716b0
  User stack:
    35 _thread_start + 34 (in libSystem.B.dylib) [0x944b6f52]
      35 __pthread_start + 321 (in libSystem.B.dylib) [0x944b7095]
        35 ??? [0x1a652]
          35 ??? [0x18b0f]
            35 ??? [0x1a953]
              35 _semaphore_timedwait_signal_trap + 10 (in libSystem.B.dylib) [0x94486226]

Comment 1

[Andreas Gal :gal]

The code in question:

      for(var i = 1; i> 0; i++)
      document.write(i);

I am not sure this is a JS-only issue. The empty loop we abort. Maybe we just generate too much data here?

Comment 2

[Brad Lassey [:blassey] (use needinfo?)]

Attachment: a second test case

for this test case, click the word slow in the red box after the page loads, minefield hangs after you click.

Comment 3

[Ryan VanderMeulen [:RyanVM]]

This still hangs.

Comment 4

[André Bargull [:anba]]

No longer reproducible, shows the slow script dialog for me in Fx60 Beta. Closing as WFM.