https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109806
Bug ID: 109806 Summary: 13.1.0 cc1plus stack smashing crash with C array of complex structs Product: gcc Version: 13.1.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: amy at amyspark dot me Target Milestone: --- Hi, Coming from https://github.com/msys2/MINGW-packages/pull/16968#issuecomment-1541465457. I've found a crash in cc1plus 13.1.0 when building an array of ~68 structs in C++. The crash yields no report or crash handling, it just causes g++ to return exit code 1. However, I was able to trap the cc1plus execution line, and then run it manually under GDB. This yielded a symbolicated stacktrace that I've uploaded along with the preprocessed file (it's 1.6MB, so it was impossible to attach them here uncompressed): https://gist.github.com/amyspark/be93638fc5b5779594dd138aa8995860 GCC version data: Using built-in specs. COLLECT_GCC=D:\msys64\ucrt64\bin\gcc.exe COLLECT_LTO_WRAPPER=D:/msys64/ucrt64/bin/../lib/gcc/x86_64-w64-mingw32/13.1.0/lto-wrapper.exe Target: x86_64-w64-mingw32 Configured with: ../gcc-13.1.0/configure --prefix=/ucrt64 --with-local-prefix=/ucrt64/local --build=x86_64-w64-mingw32 --host=x86_64-w64-mingw32 --target=x86_64-w64-mingw32 --with-native-system-header-dir=/ucrt64/include --libexecdir=/ucrt64/lib --enable-bootstrap --enable-checking=release --with-arch=nocona --with-tune=generic --enable-languages=c,lto,c++,fortran,ada,objc,obj-c++,jit --enable-shared --enable-static --enable-libatomic --enable-threads=posix --enable-graphite --enable-fully-dynamic-string --enable-libstdcxx-filesystem-ts --enable-libstdcxx-time --disable-libstdcxx-pch --enable-lto --enable-libgomp --disable-libssp --disable-multilib --disable-rpath --disable-win32-registry --disable-nls --disable-werror --disable-symvers --with-libiconv --with-system-zlib --with-gmp=/ucrt64 --with-mpfr=/ucrt64 --with-mpc=/ucrt64 --with-isl=/ucrt64 --with-pkgversion=Rev4, Built by MSYS2 project --with-bugurl=https://github.com/msys2/MINGW-packages/issues --with-gnu-as --with-gnu-ld --enable-libstdcxx-debug --with-boot-ldflags="-static-libstdc++" --with-stage1-ldflags="-static-libstdc++" Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 13.1.0 (Rev4, Built by MSYS2 project) Prior to https://github.com/msys2/MINGW-packages/pull/17094, the CFLAGS value was (I added debug !strip to the PKGBUILD options to get debugging symbols): -g -march=nocona -msahf -mtune=generic -O2 -pipe -Wp,-D_FORTIFY_SOURCE=2 -fstack-protector-strong -ggdb -Og -ffile-prefix-map=/c/Users/Amalia/Desktop/MINGW-packages/mingw-w64-gcc/src=/usr/src/debug/mingw-w64-gcc