Status: Assigned
Owner: [email protected]
CC: [email protected]
Labels: Type-Bug Priority-Medium
New issue 4381 by [email protected]: for-in-opt fails in gc stress
https://code.google.com/p/v8/issues/detail?id=4381
git checkout eb8c092822c7745b49d3d97ec93edc2b0af72827
GYP_GENERATORS=ninja GYP_DEFINES="v8_enable_disassembler=1
v8_object_print=1 release_extra_cflags='-ggdb3' use_goma=1 clang=1
target_arch=ia32 v8_target_arch=ia32 v8_enable_slow_dchecks=1
dcheck_always_on=1 v8_enable_handle_zapping=1" gclient sync
n8 -c out/Debug d8 -j1000
out/ia32/Debug/d8 --test --random-seed=-2125750218 --stress-opt
--always-opt --nohard-abort --nodead-code-elimination --nofold-constants
--enable-slow-asserts --debug-code --verify-heap --harmony-proxies
--allow-natives-syntax test/mjsunit/mjsunit.js test/mjsunit/for-in-opt.js
--gc-interval=500
============ Stress 1/2 ============
============ Stress 2/2 ============
test/mjsunit/mjsunit.js:178: Failure: expected <["a","b","c","d"]> found
<["a","a","b","c","d"]>
throw new MjsUnitAssertionError(message);
^
Error
at new MjsUnitAssertionError (test/mjsunit/mjsunit.js:31:16)
at fail (test/mjsunit/mjsunit.js:178:11)
at assertEquals (test/mjsunit/mjsunit.js:248:7)
at check_f2 (test/mjsunit/for-in-opt.js:62:3)
at test/mjsunit/for-in-opt.js:67:1
Presumably the commit eb8c092822c7745b49d3d97ec93edc2b0af72827 changed the
heap layout that caused GC to trigger at a different timing.
What seems to happen is that the proxy handler for getPropertyDescriptor is
called a second time after deopt. The bailout point is probably wrong.
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