Last Comment Bug 652422 - TI: [infer failure] Missing type at #3:00035 pushed 0: string
: TI: [infer failure] Missing type at #3:00035 pushed 0: string
Status: RESOLVED FIXED
: crash, testcase
Product: Core
Classification: Components
Component: JavaScript Engine (show other bugs)
: Trunk
: x86 Linux
: -- critical (vote)
: ---
Assigned To: general
:
Mentors:
Depends on:
Blocks: infer-regress langfuzz
  Show dependency treegraph
 
Reported: 2011-04-24 07:04 PDT by Christian Holler (:decoder)
Modified: 2013-01-14 08:33 PST (History)
4 users (show)
choller: in‑testsuite+
See Also:
Crash Signature:
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QA Whiteboard:
Iteration: ---
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Attachments

Description Christian Holler (:decoder) 2011-04-24 07:04:13 PDT
The following code crashes on TI revision 90a7b141e0cf (run with options -m -n -a), tested on 32 bit:

(function() {
    var o = {};
    with (o) o='recorder not started, ';
    ('arguments' in o, false,
                  "property deletion observable")
})()
Comment 1 Brian Hackett (:bhackett) 2011-04-24 09:31:04 PDT
This is a TM issue with NAME accesses that should get fixed as part of bug 651966 --- NAME opcodes within a script which can alias locals don't mark those locals as escaping.  This can happen in scripts using 'with', which confused the SSA analysis; the fix just disables tracking of SSA values for variables in scripts which use 'with'.  This could be improved once bug 651966 is finished.

http://hg.mozilla.org/projects/jaegermonkey/rev/8f0c5e12eba9
Comment 2 Christian Holler (:decoder) 2013-01-14 08:33:18 PST
A testcase for this bug was automatically identified at js/src/jit-test/tests/basic/bug652422.js.

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