https://gcc.gnu.org/bugzilla/show_bug.cgi?id=128205
Bug ID: 128205
Summary: internal compiler error: in cdtor_comdat_group, at
cp/optimize.cc
Product: gcc
Version: 17.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: 0599jiangyc at gmail dot com
Target Milestone: ---
The following code:
```c
struct A { virtual ~A (); };
struct D : virtual A { };
typedef struct : D { } S;
void f () { S s; }
```
Output:
```
<source>:3:16: warning: anonymous non-C-compatible type given name for linkage
purposes by 'typedef' declaration [-Wnon-c-typedef-for-linkage]
3 | typedef struct : D { } S;
| ^
| S
<source>:3:16: note: type is not C-compatible because it has a base class
<source>:3:16: internal compiler error: in cdtor_comdat_group, at
cp/optimize.cc:183
0x2c6c2f8 diagnostics::context::diagnostic_impl(rich_location*,
diagnostics::metadata const*, diagnostics::option_id, char const*,
__va_list_tag (*) [1], diagnostics::kind)
???:0
0x2c60f3b internal_error(char const*, ...)
???:0
0xb9c22e fancy_abort(char const*, int, char const*)
???:0
0xd826ad maybe_clone_body(tree_node*)
???:0
0xe9e02e expand_or_defer_fn(tree_node*)
???:0
0xd17f37 synthesize_method(tree_node*)
???:0
0xcc2cf7 mark_used(tree_node*, int)
???:0
0xbbe343 build_new_method_call(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, tree_node*, int, tree_node**, int)
???:0
0xbbf69d build_special_member_call(tree_node*, tree_node*, vec<tree_node*,
va_gc, vl_embed>**, tree_node*, int, int)
???:0
0xce4b78 build_delete(unsigned long, tree_node*, tree_node*,
special_function_kind, int, int, int)
???:0
0xc85ead cxx_maybe_build_cleanup(tree_node*, int)
???:0
0xcb3395 cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int,
cp_decomp*)
???:0
0xdf7523 c_parse_file()
???:0
0xf8bfb9 c_common_parse_file()
???:0
/cefs/86/8648502252d366b91fe55083_gcc-trunk-20261026/bin/../libexec/gcc/x86_64-linux-gnu/17.0.0/cc1plus
-quiet -imultiarch x86_64-linux-gnu -iprefix
/cefs/86/8648502252d366b91fe55083_gcc-trunk-20261026/bin/../lib/gcc/x86_64-linux-gnu/17.0.0/
-D_GNU_SOURCE <source> -quiet -dumpdir /app/output.s- -dumpbase example.cpp
-dumpbase-ext .cpp -mtune=generic -march=x86-64 -g -Os
-fdiagnostics-color=always -fno-verbose-asm -o /tmp/ccshArSU.s
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.
x86-64 gcc (trunk) - 984ms
```
Trunk: https://godbolt.org/z/EP83zxo6e
