Created attachment 579556 [details] [diff] [review]
Ensure that JM compilation doesn't used out-of-date ScriptAnalysis structures.
The contents of a ScriptAnalysis depend on the value of debugMode; for example, see the way usesReturnValue_ gets set in ScriptAnalysis::analyzeByteCode. In some cases, the compiler may try to use a ScriptAnalysis created before debug mode was turned on to generate code when debug mode is on, leading to... Undesirable Consequences [orchestra spike].
Some tests in js/src/jit-test/tests/debug cause the assertions in the attached patch to fail, if you comment out the call to JSScript::clearAnalysis that it adds.
Try server run: