https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100788
--- Comment #5 from seberg <sebastian-gcc at sipsolutions dot net> --- > Now I miss the command line. Do you mean more than the failing call?: x86_64-linux-gnu-gcc -pthread --coverage -O0 -ggdb -g -ffile-prefix-map=/build/python3.9-RNBry6/python3.9-3.9.2=. -fstack-protector-strong -g -fwrapv -O2 -D_FORTIFY_SOURCE=2 -fPIC -DNPY_INTERNAL_BUILD=1 -DHAVE_NPY_CONFIG_H=1 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE=1 -D_LARGEFILE64_SOURCE=1 -DHAVE_CBLAS -Ibuild/src.linux-x86_64-3.9/numpy/core/src/common -Ibuild/src.linux-x86_64-3.9/numpy/core/src/umath -Inumpy/core/include -Ibuild/src.linux-x86_64-3.9/numpy/core/include/numpy -Ibuild/src.linux-x86_64-3.9/numpy/distutils/include -Inumpy/core/src/common -Inumpy/core/src -Inumpy/core -Inumpy/core/src/npymath -Inumpy/core/src/multiarray -Inumpy/core/src/umath -Inumpy/core/src/npysort -Inumpy/core/src/_simd -I/usr/include/python3.9 -Ibuild/src.linux-x86_64-3.9/numpy/core/src/common -Ibuild/src.linux-x86_64-3.9/numpy/core/src/npymath -c build/src.linux-x86_64-3.9/numpy/core/src/multiarray/einsum_sumprod.c -o build/temp.linux-x86_64-3.9/build/src.linux-x86_64-3.9/numpy/core/src/multiarray/einsum_sumprod.o -msse2 -msse3 (with some warning flags removed compared to the initial report; I can try to zip up the dependencies tomorrow. To make it reproducable)