http://d.puremagic.com/issues/show_bug.cgi?id=2833
Summary: DMD returns -1073741819 on Intel Quadcore Product: D Version: 2.027 Platform: PC OS/Version: Windows Status: NEW Severity: normal Priority: P3 Component: DMD AssignedTo: bugzi...@digitalmars.com ReportedBy: webmas...@aj-productions.de With the introduction of asynchronous compilation since DMD 2.027, DMD returns -1073741819 when compiling a trivial hello world application on my Intel(R) Core(TM)2 Quad CPU: hello.d: int main(char[][] args) { return 0; } dmd.exe -g -debug -IC:\dmd\src\phobos -c hello.d -ofobj\debug\hello.obj echo %errorlevel% dmd.exe bin\debug\test2.exe obj\debug\hello.obj phobos.lib -v echo %errorlevel% The first call to DMD echos 0, while the second call echos -1073741819. So it seems to be primarily related to linking. To narrow down the cause, I tested this on two machines; also in safe mode to examine the possible side effect of background processes. This is what happend: Original machine: vista, Intel(R) Core(TM)2 Quad CPU -vista normal mode: returns -1073741819 -vista safe mode: returns 0, but OS reports crash Other machine: xp, Intel(R) Core(TM)2 Dual CPU -xp normal mode: returns 0 success [*] -xp safe mode: returns 0, success [*] [*] = The compiler crashed once, but that was probably related to corrupted OBJ files due to the switch of compiler versions. I assume that it's working on the Dual core machine now. Note: I have been given access to a version of DMD.exe (2.028) with asynchronous processing disabled. In this case, DMD.exe also returns 0 on a Quadcore machine. Conclusion: Right now, it looks like this issue is related to Intel Quad core CPUs in connection with the new async compilation feature. AMD CPUs as well as XP+Quadcore configurations are untested yet, so its not clear whether its an OS-, CPU manufacturer-, or #-of-cores issue. The role of windows safe mode is also not quite clear yet. --