https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112269
--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Patrick Palka from comment #5)
> I can't reproduce any of these testsuite failures on trunk with x86_64
> -m32... could you provide a preprocessed source file perhaps?
The libstdc++ testsuite shows lots of failures with -m32 -std=c++20
e.g.
FAIL: 23_containers/vector/48101-2_neg.cc -std=c++20 (test for errors, line )
FAIL: 23_containers/vector/48101-2_neg.cc -std=c++20 (test for excess errors)
Excess errors:
/tmp/build/x86_64-pc-linux-gnu/32/libstdc++-v3/include/complex:1493: internal
compiler error: in tsubst_expr, at cp/pt.cc:21534
0x78b9fb tsubst_expr(tree_node*, tree_node*, int, tree_node*)
/home/test/src/gcc/gcc/cp/pt.cc:21534
