Compiling DCD with -singleobj causes segmentation fault

[HK47196]

Hi,
When trying to compile DCD with the -singleobj flag turned on the compiler crashes with a segfault. I've tried my OS's LDC installation(0.16.1) and the latest beta release(0.17.0-beta2)
Backtrace:

ldc2 src/common/messages.d src/common/socket.d src/common/constants.d src/common/dcd_version.d src/client/client.d msgpack-d/src/msgpack.d -Imsgpack-d/src -Imsgpack-d/src -Icontainers/experimental_allocator/src -J=. -release -O5 -singleobj -of=bin/dcd-client
Error: #0 0x1afc270 llvm::sys::PrintStackTrace(llvm::raw_ostream&) (/usr/bin/ldc+0x1afc270)
#1 0x1afb051 (/usr/bin/ldc+0x1afb051)
#2 0x7f7fbeaf0d60 __restore_rt (/usr/lib/libpthread.so.0+0x10d60)
#3 0x7f7fbd85062e _IO_vfprintf_internal (/usr/lib/libc.so.6+0x4862e)
#4 0x7f7fbd8792b9 _IO_vsnprintf (/usr/lib/libc.so.6+0x712b9)
#5 0x6973eb OutBuffer::vprintf(char const*, __va_list_tag*) (/usr/bin/ldc+0x6973eb)
#6 0x6fb496 verrorPrint(Loc, COLOR, char const*, char const*, __va_list_tag*, char const*, char const*) (/usr/bin/ldc+0x6fb496)
#7 0x6fb916 verror(Loc, char const*, __va_list_tag*, char const*, char const*, char const*) (/usr/bin/ldc+0x6fb916)
#8 0x6fb9d1 error(Loc, char const*, ...) (/usr/bin/ldc+0x6fb9d1)
#9 0x68a1e4 writeModule(llvm::Module*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >) (/usr/bin/ldc+0x68a1e4)
#10 0x681e90 ldc::CodeGenerator::writeAndFreeLLModule(char const*) (/usr/bin/ldc+0x681e90)
#11 0x63917e main (/usr/bin/ldc+0x63917e)
#12 0x7f7fbd828610 __libc_start_main (/usr/lib/libc.so.6+0x20610)
#13 0x67c0e9 _start (/usr/bin/ldc+0x67c0e9)

DCD makefile diff
diff.txt

full output text with -v -vv, warning it's 7.5MiB
log.txt

OS:
Linux x86_64, Arch Linux

[redstar]

The stack looks cool. Dieing while trying to print an error message?

[redstar]

Confirmed. Looks like #1272 fixes it but I am still investigating why.

[redstar]

Please, could you check if the problem is still present in master? Thanks.

[HK47196]

Built LDC from master, still get the same error when attempting to compile DCD with it.

[redstar]

Ok, let's see if I can still reproduce it.

[redstar]

The error message which the code tries to print is: "Error: cannot write object file: bin/dcd-server.o"
But yet no hint what is happening here.

[kinke]

error(Loc(), "cannot write object file: %s",
#if LDC_LLVM_VER >= 306
              errinfo
#else

but errinfo is no C string, it's a std::error_code...

It should be

        error(Loc(), "cannot write object file: %s",
#if LDC_LLVM_VER >= 306
              errinfo.message()
#else
              errinfo
#endif
              .c_str());

and not just here, but in other places (in the same function, maybe in others too) as well.
I'll prepare a PR.

[HK47196]

Woops, sorry for the wild goose chase. Looks like I just messed up the command line now that I get an error message due to #1277

Works fine now, thanks for the quick turn-around.

[kinke]

Looks like I just messed up the command line

Glad you did. These bugs aren't easy to come by. :)