311819 2026-04-09 07:56:11 -0700 [GLIB][JSC] stress/iterator-prototype-includes.js tests are failing since added in 310769@main 2026-04-17 08:31:41 -0700 1 1 1 Unclassified WebKit JavaScriptCore WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 312464 310698 1 lmoura webkit-unassigned angelos jmichaud tetsuharu.ohzeki webkit-bug-importer oldest_to_newest 2198364 0 lmoura 2026-04-09 07:56:11 -0700 https://results.webkit.org/?suite=javascriptcore-tests&test=stress%2Fiterator-prototype-includes.js.default List of failures: stress/iterator-prototype-includes.js.bytecode-cache stress/iterator-prototype-includes.js.default stress/iterator-prototype-includes.js.dfg-eager stress/iterator-prototype-includes.js.dfg-eager-no-cjit-validate stress/iterator-prototype-includes.js.eager-jettison-no-cjit stress/iterator-prototype-includes.js.ftl-eager stress/iterator-prototype-includes.js.ftl-eager-no-cjit stress/iterator-prototype-includes.js.ftl-eager-no-cjit-b3o1 stress/iterator-prototype-includes.js.ftl-no-cjit-b3o0 stress/iterator-prototype-includes.js.ftl-no-cjit-no-inline-validate stress/iterator-prototype-includes.js.ftl-no-cjit-no-put-stack-validate stress/iterator-prototype-includes.js.ftl-no-cjit-small-pool stress/iterator-prototype-includes.js.ftl-no-cjit-validate-sampling-profiler stress/iterator-prototype-includes.js.lockdown stress/iterator-prototype-includes.js.mini-mode stress/iterator-prototype-includes.js.no-cjit-collect-continuously stress/iterator-prototype-includes.js.no-cjit-validate-phases stress/iterator-prototype-includes.js.no-ftl stress/iterator-prototype-includes.js.no-llint Example output for some of them: stress/iterator-prototype-includes.js.lockdown: Exception: Error: call on short iterator with 2nd arg (large number): Number.MAX_VALUE: calling .includes(): Expected false but got true stress/iterator-prototype-includes.js.lockdown: sameValue@iterator-prototype-includes.js:5:24 stress/iterator-prototype-includes.js.lockdown: global code@iterator-prototype-includes.js:457:18 stress/iterator-prototype-includes.js.lockdown: ERROR: Unexpected exit code: 3 stress/iterator-prototype-includes.js.lockdown: Repro command: jsc --validateOptions=true --useFTLJIT=false --useFunctionDotArguments=true --validateExceptionChecks=true --useDollarVM=true --maxPerThreadStackUsage=1572864 --useJIT=false --useGenerationalGC=false --useConcurrentGC=false --useLLIntICs=false --use ZombieMode=true --allowDoubleShape=false --alwaysHaveABadTime=true --libpasForcePGMWithRate=14 --useIteratorIncludes=1 iterator-prototype-includes.js stress/iterator-prototype-includes.js.default: Exception: Error: call on short iterator with 2nd arg (large number): Number.MAX_VALUE: calling .includes(): Expected false but got true stress/iterator-prototype-includes.js.default: sameValue@iterator-prototype-includes.js:5:24 stress/iterator-prototype-includes.js.default: global code@iterator-prototype-includes.js:457:18 stress/iterator-prototype-includes.js.ftl-no-cjit-b3o0: Exception: Error: call on short iterator with 2nd arg (large number): Number.MAX_VALUE: calling .includes(): Expected false but got true stress/iterator-prototype-includes.js.ftl-no-cjit-b3o0: sameValue@iterator-prototype-includes.js:5:24 stress/iterator-prototype-includes.js.ftl-no-cjit-b3o0: global code@iterator-prototype-includes.js:457:18 stress/iterator-prototype-includes.js.no-llint: Exception: Error: call on short iterator with 2nd arg (large number): Number.MAX_VALUE: calling .includes(): Expected false but got true stress/iterator-prototype-includes.js.no-llint: sameValue@iterator-prototype-includes.js:5:24 stress/iterator-prototype-includes.js.no-llint: global code@iterator-prototype-includes.js:457:18 stress/iterator-prototype-includes.js.bytecode-cache: Exception: Error: call on short iterator with 2nd arg (large number): Number.MAX_VALUE: calling .includes(): Expected false but got true stress/iterator-prototype-includes.js.bytecode-cache: sameValue@iterator-prototype-includes.js:5:24 stress/iterator-prototype-includes.js.bytecode-cache: global code@iterator-prototype-includes.js:457:18 stress/iterator-prototype-includes.js.bytecode-cache: Command '../../.vm/JavaScriptCore.framework/Helpers/jsc iterator-prototype-includes.js --validateOptions=true --useFTLJIT=false --useFunctionDotArguments=true --validateExceptionChecks=true --useDollarVM=true --maxPerThreadStackUsage=1572864 --validateOptions =true --useFTLJIT=true --useIteratorIncludes=1' failed 2198887 1 jmichaud 2026-04-10 11:41:01 -0700 This is gcc-only 2198951 2 jmichaud 2026-04-10 13:57:56 -0700 toSkip = static_cast<uint64_t>(skippedAsDouble); appears to be UB 2199064 3 jmichaud 2026-04-10 21:27:15 -0700 Pull request: https://github.com/WebKit/WebKit/pull/62511 2201470 4 ews-feeder 2026-04-17 06:39:28 -0700 Committed 311446@main (30298eb4df3c): <https://commits.webkit.org/311446@main> Reviewed commits have been landed. Closing PR #62511 and removing active labels. 2201471 5 webkit-bug-importer 2026-04-17 06:40:14 -0700 <rdar://problem/175005735> 2201518 6 tetsuharu.ohzeki 2026-04-17 08:31:41 -0700 *** Bug 312464 has been marked as a duplicate of this bug. ***