139679 2014-12-16 06:49:34 -0800 0<=NaN return TRUE if disabling JIT 2015-12-10 01:13:33 -0800 1 1 1 Unclassified WebKit JavaScriptCore 528+ (Nightly build) Unspecified Linux RESOLVED WONTFIX InRadar P2 Normal --- 1 mwang webkit-unassigned ggaren matthew_hanson nwaschbu webkit-bug-importer oldest_to_newest 1055971 0 mwang 2014-12-16 06:49:34 -0800 If --enable-jit=yes, '0<=NaN' returns false. If --enable-jit=no, '0<=NaN' returns true. it is not corrected. 1056374 1 webkit-bug-importer 2014-12-17 10:53:17 -0800 <rdar://problem/19280919> 1056593 2 ggaren 2014-12-17 16:41:17 -0800 Can you be more specific? I tried this: [redacted]> JSC_useJIT=0 DYLD_FRAMEWORK_PATH=./Contents/Frameworks/ ./Contents/Resources/jsc >>> 0<=NaN false 1056647 3 mwang 2014-12-17 17:38:37 -0800 I am using WebKitGTK2.0.1 which didn't change the JavascriptCore. My test script is: <script> 0 <= NaN?console.log("TRUE"):console.log("FALSE"); </script> OS: Linux. Result: If --enable-jit=yes, "0 <= NaN" always is FALSE no matter if JIT is enabled by ENV If --enable-jit=no, "0 <= NaN" always is TRUE. So, JIT must be disabled in the build configuration in order to reproduce this issue. 1056650 4 mwang 2014-12-17 17:43:33 -0800 If disabling the JIT in the build configuration, the issue can reproduced. So It is reopened. JSC_useJIT=0 can't reproduce this issue if --enable-jit=yes in the build configuration. 1148099 5 mwang 2015-12-10 01:13:33 -0800 In only a few versions of offlineasm/cloop.rb, "isnan" was used (not "std::isnan"). This issue can't be reproduced if using "std::isnan", so it is set to be 'WONTFIX'