https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120381
Bug ID: 120381
Summary: internal compiler error: in composite_type_internal,
at c/c-typeck.cc:848
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: xieym3 at zohomail dot com
Target Milestone: ---
$ cat file.c
struct A {
struct A {
struct A *p;
} *p;
};
int foo(const struct A *q) { return q->p == q; }
void bar(int);
void baz() {
struct A a;
while (foo(&a))
bar(foo(&a));
}
$ gcc -v
Using built-in specs.
COLLECT_GCC=/data/xieym/work-rgf/misc_tools/install/gcc-trunk/bin/gcc
COLLECT_LTO_WRAPPER=/data/xieym/work-rgf/misc_tools/install/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/16.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /data/xieym/work-rgf/misc_tools/src/gcc-trunk/configure
--enable-coverage --enable-checking --disable-multilib --disable-shared
--disable-bootstrap --enable-language=c,c++
--prefix=/data/xieym/work-rgf/misc_tools/install/gcc-trunk
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 16.0.0 20250519 (experimental) (GCC)
$ gcc -c file.c -o /dev/null
<source>:6:22: internal compiler error: in composite_type_internal, at
c/c-typeck.cc:848
6 | int foo(const struct A *q) { return q->p == q; }
| ^
0x260c7a5 diagnostic_context::diagnostic_impl(rich_location*,
diagnostic_metadata const*, diagnostic_option_id, char const*, __va_list_tag
(*) [1], diagnostic_t)
???:0
0x262a516 internal_error(char const*, ...)
???:0
0x9f37e0 fancy_abort(char const*, int, char const*)
???:0
0xa53093 build_binary_op(unsigned long, tree_code, tree_node*, tree_node*,
bool)
???:0
0xa55496 parser_build_binary_op(unsigned long, tree_code, c_expr, c_expr)
???:0
0xabbbee c_parse_file()
???:0
0xb3c959 c_common_parse_file()
???:0
Godbolt url: https://godbolt.org/z/PKefohbPv
