https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100486
--- Comment #35 from Óscar Fuentes <gcc_bugzilla at axeitado dot com> --- Yes, it is a debug build (the libstdc++ dll you got is from that). The same crash happens with a release build, though. Note the -Og going after the -O2: /d/dev/other/MINGW-packages/mingw-w64-gcc/src/build-i686-w64-mingw32/./gcc/xgcc -B/d/dev/other/MINGW-packages/mingw-w64-gcc/src/build-i686-w64-mingw32/./gcc/ -L/mingw32/i686-w64-mingw32/lib -L/mingw32/lib -isystem /mingw32/i686-w64-mingw32/include -isystem /mingw32/include -B/mingw32/i686-w64-mingw32/bin/ -B/mingw32/i686-w64-mingw32/lib/ -isystem /mingw32/i686-w64-mingw32/include -isystem /mingw32/i686-w64-mingw32/sys-include -g -march=pentium4 -mtune=generic -O2 -pipe -ggdb -Og -fdebug-prefix-map=/d/dev/other/MINGW-packages/mingw-w64-gcc/src=/usr/src/debug -O2 -g -march=pentium4 -mtune=generic -O2 -pipe -ggdb -Og -fdebug-prefix-map=/d/dev/other/MINGW-packages/mingw-w64-gcc/src=/usr/src/debug -DIN_GCC -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wno-error=format-diag -Wstrict-prototypes -Wmissing-prototypes -Wno-error=format-diag -Wold-style-definition -isystem ./include -I. -I. -I../.././gcc -I../../../gcc-11.2.0/libgcc -I../../../gcc-11.2.0/libgcc/. -I../../../gcc-11.2.0/libgcc/../gcc -I../../../gcc-11.2.0/libgcc/../include -I../../../gcc-11.2.0/libgcc/config/libbid -DENABLE_DECIMAL_BID_FORMAT -g0 -finhibit-size-directive -fno-inline -fno-exceptions -fno-zero-initialized-in-bss -fno-toplevel-reorder -fno-tree-vectorize -fbuilding-libgcc -fno-stack-protector -I. -I. -I../.././gcc -I../../../gcc-11.2.0/libgcc -I../../../gcc-11.2.0/libgcc/. -I../../../gcc-11.2.0/libgcc/../gcc -I../../../gcc-11.2.0/libgcc/../include -I../../../gcc-11.2.0/libgcc/config/libbid -DENABLE_DECIMAL_BID_FORMAT -o crtend.o -MT crtend.o -MD -MP -MF crtend.dep -fno-omit-frame-pointer -Wno-error -c ../../../gcc-11.2.0/libgcc/config/i386/cygming-crtend.c
