Created attachment 423423 [details] poc asan output: WARNING: ASAN interferes with JSC signal handlers; useWebAssemblyFastMemory and useSharedArrayBuffer will be disabled. Exception: TypeError: calling Uint32Array constructor without new is invalid Uint32Array@[native code] global code@2:32:17 ================================================================= ==14812==ERROR: LeakSanitizer: detected memory leaks Direct leak of 312 byte(s) in 12 object(s) allocated from: #0 0x4e0ee0 (/root/targets/targets/jsc_afl_asan18+0x4e0ee0) #1 0x695e87e (/root/targets/targets/jsc_afl_asan18+0x695e87e) SUMMARY: AddressSanitizer: 312 byte(s) leaked in 12 allocation(s).
<rdar://problem/75766005>