Dynamic linking compilation crashes with -g

[quanterion]

Tried to compile simple repo at https://github.com/quanterion/WASMDynamicLinking with debug information enabled (adding -g to compilation flag) results in crash:
user@comp:~/WASMDynamicLinking$ ./CompileToWasm.sh PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace. emcc: error: '/home/rem/emsdk/upstream/bin/wasm-ld @/tmp/emscripten_4yn7fmll.rsp.utf-8' failed (received SIGSEGV (-11))

through compilation works just fine if remove "-g" flag from https://github.com/quanterion/WASMDynamicLinking/blob/main/CompileToWasm.sh

[sbc100]

Can you trying installing the -asserts version of the sdk (e.g. ./emsdk install latest-asserts) and include the backtrace, and the full failing command line?

[quanterion]

@sbc100 Here is it:

user@comp:~/WASMDynamicLinking$ ./CompileToWasm.sh 
wasm-ld: /b/s/w/ir/cache/builder/emscripten-releases/llvm-project/llvm/include/llvm/Support/Casting.h:578: decltype(auto) llvm::cast(From *) [To = lld::wasm::DefinedFunction, From = const lld::wasm::Symbol]: Assertion `isa<To>(Val) && "cast<Ty>() argument of incompatible type!"' failed.
wasm-ld: /b/s/w/ir/cache/builder/emscripten-releases/llvm-project/llvm/include/llvm/Support/Casting.h:578: decltype(auto) llvm::cast(From *) [To = lld::wasm::DefinedFunction, From = const lld::wasm::Symbol]: Assertion `isa<To>(Val) && "cast<Ty>() argument of incompatible type!"' failed.
wasm-ld: /b/s/w/ir/cache/builder/emscripten-releases/llvm-project/llvm/include/llvm/Support/Casting.h:578: decltype(auto) llvm::cast(From *) [To = lld::wasm::DefinedFunction, From = const lld::wasm::Symbol]: Assertion `isa<To>(Val) && "cast<Ty>() argument of incompatible type!"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
emcc: error: '/home/rem/emsdk/upstream/bin/wasm-ld @/tmp/emscripten_xzq32t5r.rsp.utf-8' failed (received SIGABRT (-6))

[sbc100]

I don't see the emcc command line here. Perhaps you could have your compile script echo the commands? Especially the ones that fail?

Also, sadly the wasm-ld command here is using a response file which makes it hard to see that is being passed to wasm-ld.

I'm also somewhat surprised as the lack of information in the output that comes with the PLEASE submit a bug report. Normally you get a lot more useful backtrace information that that.

But just having the full emcc and wasm-ld commands would be useful.

[quanterion]

@sbc100 here is it, those command just executed from this file: https://github.com/quanterion/WASMDynamicLinking/blob/main/CompileToWasm.sh

user@pc:~/WASMDynamicLinking$ emcc -sSIDE_MODULE=1 -sMAIN_MODULE=0 -s EXPORT_ALL=1 -sPROXY_TO_PTHREAD -pthread -sSHARED_MEMORY=1 -Wno-experimental -g -o Build/libcalc.so Src/calc.cpp
user@pc:~/WASMDynamicLinking$ emcc -sMAIN_MODULE=2 -sAUTOLOAD_DYLIBS=0 -sPROXY_TO_PTHREAD -pthread -sSHARED_MEMORY=1 -Wno-experimental -g -o Build/main.html Build/libcalc.so Src/main.cpp
wasm-ld: /b/s/w/ir/cache/builder/emscripten-releases/llvm-project/llvm/include/llvm/Support/Casting.h:578: decltype(auto) llvm::cast(From *) [To = lld::wasm::DefinedFunction, From = const lld::wasm::Symbol]: Assertion `isa<To>(Val) && "cast<Ty>() argument of incompatible type!"' failed.
wasm-ld: /b/s/w/ir/cache/builder/emscripten-releases/llvm-project/llvm/include/llvm/Support/Casting.h:578: decltype(auto) llvm::cast(From *) [To = lld::wasm::DefinedFunction, From = const lld::wasm::Symbol]: Assertion `isa<To>(Val) && "cast<Ty>() argument of incompatible type!"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
wasm-ld: /b/s/w/ir/cache/builder/emscripten-releases/llvm-project/llvm/include/llvm/Support/Casting.h:578: decltype(auto) llvm::cast(From *) [To = lld::wasm::DefinedFunction, From = const lld::wasm::Symbol]: Assertion `isa<To>(Val) && "cast<Ty>() argument of incompatible type!"' failed.
emcc: error: '/home/rem/emsdk/upstream/bin/wasm-ld @/tmp/emscripten_ixv7uy_a.rsp.utf-8' failed (received SIGABRT (-6))

anyway linked repo is the very minimal repro https://github.com/quanterion/WASMDynamicLinking