https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120766
Bug ID: 120766
Summary: ICE Segmentation fault with duplicate extern variable
of template type
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: rush102333 at gmail dot com
Target Milestone: ---
Probably starts from gcc-12: https://godbolt.org/z/acEsfbn3j
Simplified Test:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
template<typename _Tp, typename _Bt = _Tp>
class RepPtrStore {
_Tp * _obj;
void foo();
};
template<typename _Tp,typename _Bt>
void RepPtrStore<_Tp,_Bt>::foo()
{
extern _Tp * new_r;
extern _Tp * new_r;
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Stack Dump:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<source>: In member function 'void RepPtrStore<_Tp, _Bt>::foo()':
<source>:10:18: internal compiler error: Segmentation fault
10 | extern _Tp * new_r;
| ^~~~~
0x283a3d5 diagnostic_context::diagnostic_impl(rich_location*,
diagnostic_metadata const*, diagnostic_option_id, char const*, __va_list_tag
(*) [1], diagnostic_t)
???:0
0x285bb66 internal_error(char const*, ...)
???:0
0xdf3f3f merge_decl_attributes(tree_node*, tree_node*)
???:0
0xbbd06f duplicate_decls(tree_node*, tree_node*, bool, bool)
???:0
0xc9836f pushdecl(tree_node*, bool)
???:0
0xbcbd9d start_decl(cp_declarator const*, cp_decl_specifier_seq*, int,
tree_node*, tree_node*, tree_node**)
???:0
0xd07833 c_parse_file()
???:0
0xe6f319 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.
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