https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117152
Bug ID: 117152
Summary: Segmentation fault in permerror(unsigned int, char
const*, ...)
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: yihan4845 at gmail dot com
Target Milestone: ---
Compiler Explorer: https://godbolt.org/z/jYKsrhPY1
The following program:
```cpp
template<typename T> struct S {};
struct X {
friend constexpr S<int>::S(S<int>&& = {0}) noexcept;
};
```
will trigger segmentation fault for gcc trunk.
Stack dump:
```
Segmentation fault
0x286a525 diagnostic_context::diagnostic_impl(rich_location*,
diagnostic_metadata const*, diagnostic_option_id, char const*, __va_list_tag
(*) [1], diagnostic_t)
???:0
0x287e305 internal_error(char const*, ...)
???:0
0x28a10f3 pretty_printer::format(text_info&)
???:0
0x286a242 diagnostic_context::report_diagnostic(diagnostic_info*)
???:0
0x286a525 diagnostic_context::diagnostic_impl(rich_location*,
diagnostic_metadata const*, diagnostic_option_id, char const*, __va_list_tag
(*) [1], diagnostic_t)
???:0
0x287d4bf permerror(unsigned int, char const*, ...)
???:0
0xb6d4d1 grokdeclarator(cp_declarator const*, cp_decl_specifier_seq*,
decl_context, int, tree_node**)
???:0
0xb8e620 grokfield(cp_declarator const*, cp_decl_specifier_seq*, tree_node*,
bool, tree_node*, tree_node*)
???:0
0xc98ffa c_parse_file()
???:0
0xdf0c19 c_common_parse_file()
???:0
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.
Compiler returned: 1
```
