161436 2016-08-31 08:44:16 -0700 stress/random-53bit.js.ftl-no-cjit-no-inline-validate sometimes fails 2016-08-31 14:05:34 -0700 1 1 1 Unclassified WebKit JavaScriptCore WebKit Nightly Build All All RESOLVED FIXED P2 Normal --- 1 fpizlo ysuzuki commit-queue keith_miller mark.lam msaboff saam ysuzuki oldest_to_newest 1224950 0 fpizlo 2016-08-31 08:44:16 -0700 I think this failure is rare. It doesn't happen all the time because it probably depends on a particular return value from Math.random(). 1224951 1 fpizlo 2016-08-31 08:44:34 -0700 This is all it says when it fails: stress/random-53bit.js.ftl-no-cjit-no-inline-validate: Exception: Error: OUT stress/random-53bit.js.ftl-no-cjit-no-inline-validate: global code@random-53bit.js:23:24 stress/random-53bit.js.ftl-no-cjit-no-inline-validate: ERROR: Unexpected exit code: 3 1224960 2 ysuzuki 2016-08-31 09:19:21 -0700 Ooooops, thanks. Looking. 1224995 3 ysuzuki 2016-08-31 10:47:16 -0700 I think there are two possible reasons. 1. By design, this test rarely may fail. We can reduce this rate by increasing MAX value. It may solve the issue. 2. It may be caused by the specific random seed patterns. If (1) is the reason, everything is ok. We can just increase the MAX value. But if (2) is the reason, there should be some issues. To validate the reason, I'm infinitely executing this test now. 1225001 4 ysuzuki 2016-08-31 11:09:20 -0700 Reproduced. Failed pattern is the following. https://gist.github.com/Constellation/0f43a235e6e43bfc9ab7ddc4a537757a And I'll dump the random seed... 1225014 5 ysuzuki 2016-08-31 11:47:16 -0700 OK, this is just because accidentally some random sequence is shown. I'll tweak the test to reduce this rate. 1225025 6 287526 ysuzuki 2016-08-31 12:20:31 -0700 Created attachment 287526 Patch 1225035 7 287526 fpizlo 2016-08-31 12:37:57 -0700 Comment on attachment 287526 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=287526&action=review > JSTests/stress/random-53bit.js:25 > -for (var i = 0; i < 1e4; ++i) { > +for (var i = 0; i < 1e2; ++i) { I don't think this is a good idea. Eager tests mean that they compile with less profiling, which may lead the compiler to make different decisions. I've only seen this fail in a non-eager config, and I don't think you can be sure that an eager test would catch a non-eager failure. 1225038 8 287526 ysuzuki 2016-08-31 12:43:26 -0700 Comment on attachment 287526 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=287526&action=review >> JSTests/stress/random-53bit.js:25 >> +for (var i = 0; i < 1e2; ++i) { > > I don't think this is a good idea. Eager tests mean that they compile with less profiling, which may lead the compiler to make different decisions. I've only seen this fail in a non-eager config, and I don't think you can be sure that an eager test would catch a non-eager failure. Make sense. Just increasing the MAX value should solve the problem. 1225040 9 287529 ysuzuki 2016-08-31 12:45:52 -0700 Created attachment 287529 Patch 1225082 10 287529 commit-queue 2016-08-31 14:05:30 -0700 Comment on attachment 287529 Patch Clearing flags on attachment: 287529 Committed r205267: <http://trac.webkit.org/changeset/205267> 1225083 11 commit-queue 2016-08-31 14:05:34 -0700 All reviewed patches have been landed. Closing bug. 287526 2016-08-31 12:20:31 -0700 2016-08-31 12:45:48 -0700 Patch bug-161436-20160901041818.patch text/plain 5918 ysuzuki U3VidmVyc2lvbiBSZXZpc2lvbjogMjA1MjQ4CmRpZmYgLS1naXQgYS9Tb3VyY2UvSmF2YVNjcmlw dENvcmUvQ2hhbmdlTG9nIGIvU291cmNlL0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwppbmRleCAw NDE4MjZhMTlhN2ZiY2U4YmY0ZDZmNGZiY2M1NTU3NTQxMzljMDAzLi44MjI0YTI4Y2YxYjlmYmEw MDMyNWYzNTM2Nzg1ZTc2OGMxZjUzZmVjIDEwMDY0NAotLS0gYS9Tb3VyY2UvSmF2YVNjcmlwdENv cmUvQ2hhbmdlTG9nCisrKyBiL1NvdXJjZS9KYXZhU2NyaXB0Q29yZS9DaGFuZ2VMb2cKQEAgLTEs MyArMSwxOCBAQAorMjAxNi0wOC0zMSAgWXVzdWtlIFN1enVraSAgPHV0YXRhbmUudGVhQGdtYWls LmNvbT4KKworICAgICAgICBzdHJlc3MvcmFuZG9tLTUzYml0LmpzLmZ0bC1uby1jaml0LW5vLWlu bGluZS12YWxpZGF0ZSBzb21ldGltZXMgZmFpbHMKKyAgICAgICAgaHR0cHM6Ly9idWdzLndlYmtp dC5vcmcvc2hvd19idWcuY2dpP2lkPTE2MTQzNgorCisgICAgICAgIFJldmlld2VkIGJ5IE5PQk9E WSAoT09QUyEpLgorCisgICAgICAgICoganNjLmNwcDoKKyAgICAgICAgKEdsb2JhbE9iamVjdDo6 ZmluaXNoQ3JlYXRpb24pOgorICAgICAgICAoZnVuY3Rpb25HZXRSYW5kb21TZWVkKToKKyAgICAg 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