Bug 24009 – The garbage collector tries to allocate memory while the program is out of memory

- When the program runs out of memory, the runtime starts a GC cycle. - While the GC is running, the program is still out of memory, so requests for more memory from the OS will fail. - Therefore, it should not request more memory from the OS. - The GC requests more memory from the OS while it is running. - Therefore, the GC may cause the program to crash when it runs out of memory. Unfortunately I do not have a standalone reproducer, but here is a stack trace which illustrates the problem: #0 0x00005555559438b8 in onOutOfMemoryErrorNoGC () #1 0x000055555593ed4b in core.internal.gc.impl.conservative.gc.Gcx.ToScanStack!(void*).ToScanStack.grow() () #2 0x0000555555939957 in core.internal.gc.impl.conservative.gc.Gcx.collectRoots(void*, void*) () #3 0x00005555559426a0 in core.thread.threadbase.thread_scanAll(scope void(void*, void*) nothrow delegate).__lambda2!(core.thread.threadbase.ScanType, void*, void*).__lambda2(core.thread.threadbase.ScanType, void*, void*) () #4 0x00005555559472dc in core.thread.threadbase.scanAllTypeImpl(scope void(core.thread.threadbase.ScanType, void*, void*) nothrow delegate, void*) () #5 0x0000555555947219 in core.thread.threadbase.thread_scanAllType(scope void(core.thread.threadbase.ScanType, void*, void*) nothrow delegate).__lambda2!(void*).__lambda2(void*) () #6 0x00005555559426e0 in core.thread.osthread.callWithStackShell(scope void(void*) nothrow delegate) () #7 0x00005555559471ee in thread_scanAllType () #8 0x0000555555942666 in thread_scanAll () #9 0x0000555555939a46 in core.internal.gc.impl.conservative.gc.Gcx.collectAllRoots(bool) () #10 0x000055555593bb92 in core.internal.gc.impl.conservative.gc.Gcx.markParallel(bool) () #11 0x000055555593b1e0 in core.internal.gc.impl.conservative.gc.Gcx.fullcollect(bool, bool, bool) () #12 0x0000555555939269 in core.internal.gc.impl.conservative.gc.Gcx.smallAlloc(ulong, ref ulong, uint, const(TypeInfo)) () #13 0x000055555593f235 in core.internal.gc.impl.conservative.gc.ConservativeGC.runLocked!(core.internal.gc.impl.conservative.gc.ConservativeGC.mallocNoSync(ulong, uint, ref ulong, const(TypeInfo)), core.internal.gc.impl.conservative.gc.mallocTime, core.internal.gc.impl.conservative.gc.numMallocs, ulong, uint, ulong, const(TypeInfo)).runLocked(ref ulong, ref uint, ref ulong, ref const(TypeInfo)) () #14 0x0000555555936cce in core.internal.gc.impl.conservative.gc.ConservativeGC.qalloc(ulong, uint, scope const(TypeInfo)) () #15 0x00005555558c4ba3 in gc_qalloc () #16 0x000055555590e7fa in rt.lifetime.__arrayAlloc(ulong, ref core.memory.BlkInfo_, scope const(TypeInfo), const(TypeInfo)) () #17 0x00005555558cc92e in _d_arrayappendcTX () #18 0x00005555558cc0e9 in _d_arrayappendT ()

THIS ISSUE HAS BEEN MOVED TO GITHUB https://github.com/dlang/dmd/issues/17463 DO NOT COMMENT HERE ANYMORE, NOBODY WILL SEE IT, THIS ISSUE HAS BEEN MOVED TO GITHUB