Bug 17413 – Deadlock if allocation fails during runtime initialization

$ echo 'void main() {}' > test.d $ dmd test.d $ ( ulimit -v 16384 ; ./test ) (hangs) Attaching with gdb shows the following stack trace: Thread 1 (Thread 0x7fab23098840 (LWP 31767)): #0 0x00007fab22ca9296 in do_futex_wait.constprop () from /usr/lib/libpthread.so.0 #1 0x00007fab22ca9354 in __new_sem_wait_slow.constprop.0 () from /usr/lib/libpthread.so.0 #2 0x0000000000443b09 in thread_suspendAll () #3 0x0000000000435359 in gc.impl.conservative.gc.Gcx.fullcollect(bool) () #4 0x00000000004333c6 in gc.impl.conservative.gc.Gcx.smallAlloc(ubyte, ref ulong, uint) () #5 0x0000000000437607 in gc.impl.conservative.gc.ConservativeGC.runLocked!(gc.impl.conservative.gc.ConservativeGC.mallocNoSync(ulong, uint, ref ulong, const(TypeInfo)), gc.impl.conservative.gc.mallocTime, gc.impl.conservative.gc.numMallocs, ulong, uint, ulong, const(TypeInfo)).runLocked(ref ulong, ref uint, ref ulong, ref const(TypeInfo)) () #6 0x0000000000430eea in gc.impl.conservative.gc.ConservativeGC.malloc(ulong, uint, const(TypeInfo)) () #7 0x00000000004302c0 in gc_malloc () #8 0x0000000000439107 in _d_newclass () #9 0x00000000004438fc in thread_attachThis () #10 0x0000000000443826 in thread_init () #11 0x00000000004301cf in gc_init () #12 0x000000000042950b in rt_init () #13 0x000000000042718e in _D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ6runAllMFNlZv () #14 0x0000000000427135 in _D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ7tryExecMFNlMDFZvZv () #15 0x00000000004270af in _d_run_main () #16 0x0000000000426ede in main () #17 0x00007fab21fdf511 in __libc_start_main () from /usr/lib/libc.so.6 #18 0x0000000000426dfa in _start ()

Fix in https://github.com/dlang/druntime/pull/1872

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