https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119608
Nathaniel Shead <nshead at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2025-04-03
Ever confirmed|0 |1
CC| |nshead at gcc dot gnu.org
Status|UNCONFIRMED |NEW
Blocks| |103524
--- Comment #1 from Nathaniel Shead <nshead at gcc dot gnu.org> ---
Confirmed. A curious reduction; reformatting the 'visit' forward-decl causes
it to go away:
// test.cpp
export module repro;
template<class Visitor>
auto
visit(
Visitor v
) -> decltype(
v(0));
template<class Visitor> auto visit(Visitor v) -> decltype(v(0)) {}
$ g++-15 -fmodules -std=c++23 -S test.cpp
test.cpp:1:8: internal compiler error: in write_location, at cp/module.cc:17561
1 | export module repro;
| ^~~~~~
0x3ccec85 internal_error(char const*, ...)
../../gcc/gcc/diagnostic-global-context.cc:517
0x3c99890 fancy_abort(char const*, int, char const*)
../../gcc/gcc/diagnostic.cc:1749
0x1143372 write_location
../../gcc/gcc/cp/module.cc:17561
0x1142e2d write_location
../../gcc/gcc/cp/module.cc:17467
0x110f586 core_vals
../../gcc/gcc/cp/module.cc:6281
0x1114cf6 tree_node_vals
../../gcc/gcc/cp/module.cc:7683
0x111ed81 tree_value
../../gcc/gcc/cp/module.cc:9670
0x1120053 tree_node
../../gcc/gcc/cp/module.cc:9982
0x110fdab core_vals
../../gcc/gcc/cp/module.cc:6410
0x1114cf6 tree_node_vals
../../gcc/gcc/cp/module.cc:7683
0x111ed81 tree_value
../../gcc/gcc/cp/module.cc:9670
0x1120053 tree_node
../../gcc/gcc/cp/module.cc:9982
0x111e302 type_node
../../gcc/gcc/cp/module.cc:9550
0x111fe15 tree_node
../../gcc/gcc/cp/module.cc:9934
0x112810b key_mergeable
../../gcc/gcc/cp/module.cc:11574
0x111721b decl_value
../../gcc/gcc/cp/module.cc:8287
0x111b236 decl_node
../../gcc/gcc/cp/module.cc:8984
0x1120028 tree_node
../../gcc/gcc/cp/module.cc:9977
0x113f33e module_state::write_cluster(elf_out*, depset**, unsigned int,
depset::hash&, unsigned int*, unsigned int*)
../../gcc/gcc/cp/module.cc:16391
0x114a5da module_state::write_begin(elf_out*, cpp_reader*,
module_state_config&, unsigned int&)
../../gcc/gcc/cp/module.cc:19784
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103524
[Bug 103524] [meta-bug] modules issue
