https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122422
Bug ID: 122422
Summary: Missing array size causes compiler crash
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: d7d1cd at mail dot ru
Target Milestone: ---
If a static array is created in a class template without specifying the number
of elements, compiling a module with this template breaks the compiler (see
example here: https://godbolt.org/z/coTGc6354)
$ cat module.ixx
export module M;
template <typename> struct Type {
constexpr static int arr[] = {42, 43, 44};
};
$ g++ module.ixx -std=c++23 -fmodules-ts
<source>:1:8: internal compiler error: in decl_value, at cp/module.cc:8293
1 | export module M;
| ^~~~~~
0x28e2038 diagnostics::context::diagnostic_impl(rich_location*,
diagnostics::metadata const*, diagnostics::option_id, char const*,
__va_list_tag (*) [1], diagnostics::kind)
???:0
0x28d6e2b internal_error(char const*, ...)
???:0
0xb07b18 fancy_abort(char const*, int, char const*)
???:0
0xca2945 depset::hash::find_dependencies(module_state*)
???:0
0xca340a module_state::write_begin(elf_out*, cpp_reader*,
module_state_config&, unsigned int&)
???:0
0xca4c84 finish_module_processing(cpp_reader*)
???:0
0xc215b2 c_parse_final_cleanups()
???:0
0xeb1498 c_common_parse_file()
???:0
Explicitly specifying the size solves the problem
https://godbolt.org/z/ox9xTdWbM
