The JSTest stress/spread-forward-call-varargs-stack-overflow.js fails on platforms GTK and JSCOnly (Linux). It don't fails always. Sometimes it passes. But most of the times it fails. Examples: stress/spread-forward-call-varargs-stack-overflow.js.ftl-no-cjit-validate-sampling-profiler: Exception: Error: Bad assertion stress/spread-forward-call-varargs-stack-overflow.js.ftl-no-cjit-validate-sampling-profiler: assert@spread-forward-call-varargs-stack-overflow.js:3:24 stress/spread-forward-call-varargs-stack-overflow.js.ftl-no-cjit-validate-sampling-profiler: global code@spread-forward-call-varargs-stack-overflow.js:40:15 stress/spread-forward-call-varargs-stack-overflow.js.ftl-no-cjit-validate-sampling-profiler: ERROR: Unexpected exit code: 3 ^^^ GTK+ AMD64 https://build.webkit.org/builders/GTK%20Linux%2064-bit%20Release%20%28Tests%29/builds/21291/steps/jscore-test/logs/stdio Running stress/spread-forward-call-varargs-stack-overflow.js.default Running stress/spread-forward-call-varargs-stack-overflow.js.no-llint stress/spread-forward-call-varargs-stack-overflow.js.default: Exception: Error: Bad assertion stress/spread-forward-call-varargs-stack-overflow.js.default: assert@spread-forward-call-varargs-stack-overflow.js:3:24 stress/spread-forward-call-varargs-stack-overflow.js.default: global code@spread-forward-call-varargs-stack-overflow.js:36:15 stress/spread-forward-call-varargs-stack-overflow.js.default: ERROR: Unexpected exit code: 3 FAIL: stress/spread-forward-call-varargs-stack-overflow.js.default Running stress/spread-forward-call-varargs-stack-overflow.js.no-cjit-validate-phases stress/spread-forward-call-varargs-stack-overflow.js.no-llint: Exception: Error: Bad assertion stress/spread-forward-call-varargs-stack-overflow.js.no-llint: assert@spread-forward-call-varargs-stack-overflow.js:3:24 stress/spread-forward-call-varargs-stack-overflow.js.no-llint: global code@spread-forward-call-varargs-stack-overflow.js:36:15 stress/spread-forward-call-varargs-stack-overflow.js.no-llint: ERROR: Unexpected exit code: 3 FAIL: stress/spread-forward-call-varargs-stack-overflow.js.no-llint Running stress/spread-forward-call-varargs-stack-overflow.js.no-cjit-collect-continuously stress/spread-forward-call-varargs-stack-overflow.js.no-cjit-collect-continuously: Exception: Error: Bad assertion stress/spread-forward-call-varargs-stack-overflow.js.no-cjit-collect-continuously: assert@spread-forward-call-varargs-stack-overflow.js:3:24 stress/spread-forward-call-varargs-stack-overflow.js.no-cjit-collect-continuously: global code@spread-forward-call-varargs-stack-overflow.js:36:15 stress/spread-forward-call-varargs-stack-overflow.js.no-cjit-collect-continuously: ERROR: Unexpected exit code: 3 FAIL: stress/spread-forward-call-varargs-stack-overflow.js.no-cjit-collect-continuously Running stress/spread-forward-call-varargs-stack-overflow.js.dfg-eager stress/spread-forward-call-varargs-stack-overflow.js.no-cjit-validate-phases: Exception: Error: Bad assertion stress/spread-forward-call-varargs-stack-overflow.js.no-cjit-validate-phases: assert@spread-forward-call-varargs-stack-overflow.js:3:24 stress/spread-forward-call-varargs-stack-overflow.js.no-cjit-validate-phases: global code@spread-forward-call-varargs-stack-overflow.js:36:15 stress/spread-forward-call-varargs-stack-overflow.js.no-cjit-validate-phases: ERROR: Unexpected exit code: 3 FAIL: stress/spread-forward-call-varargs-stack-overflow.js.no-cjit-validate-phases Running stress/spread-forward-call-varargs-stack-overflow.js.dfg-eager-no-cjit-validate stress/spread-forward-call-varargs-stack-overflow.js.dfg-eager: Exception: Error: Bad assertion stress/spread-forward-call-varargs-stack-overflow.js.dfg-eager: assert@spread-forward-call-varargs-stack-overflow.js:3:24 stress/spread-forward-call-varargs-stack-overflow.js.dfg-eager: global code@spread-forward-call-varargs-stack-overflow.js:36:15 stress/spread-forward-call-varargs-stack-overflow.js.dfg-eager: ERROR: Unexpected exit code: 3 FAIL: stress/spread-forward-call-varargs-stack-overflow.js.dfg-eager Running stress/spread-forward-call-varargs-stack-overflow.js.dfg-maximal-flush-validate-no-cjit stress/spread-forward-call-varargs-stack-overflow.js.dfg-eager-no-cjit-validate: Exception: Error: Bad assertion stress/spread-forward-call-varargs-stack-overflow.js.dfg-eager-no-cjit-validate: assert@spread-forward-call-varargs-stack-overflow.js:3:24 stress/spread-forward-call-varargs-stack-overflow.js.dfg-eager-no-cjit-validate: global code@spread-forward-call-varargs-stack-overflow.js:36:15 stress/spread-forward-call-varargs-stack-overflow.js.dfg-eager-no-cjit-validate: ERROR: Unexpected exit code: 3 FAIL: stress/spread-forward-call-varargs-stack-overflow.js.dfg-eager-no-cjit-validate ^^^ JSCOnly ARMv7 Traditional https://build.webkit.org/builders/JSCOnly%20Linux%20ARMv7%20Traditional%20Release/builds/3583/steps/jscore-test/logs/stdio