https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120380
Bug ID: 120380
Summary: internal compiler error: error reporting routines
re-entered
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 pair_t {
char c;
__int128_t i;
} __attribute__((packed));
typedef struct unaligned_int128_t_ {
struct unaligned_int128_t_ {
struct unaligned_int128_t_ {
__int128_t value;
}
}
} __attribute__((packed, may_alias)) unaligned_int128_t;
struct pair_t p = {0, 1};
unaligned_int128_t *addr = (unaligned_int128_t *)&p.i;
int main() {
addr->value = 0;
return 0;
}
$ 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
internal compiler error: error reporting routines re-entered.
0x260c68e diagnostic_context::report_diagnostic(diagnostic_info*)
???:0
0x260c7a5 diagnostic_context::diagnostic_impl(rich_location*,
diagnostic_metadata const*, diagnostic_option_id, char const*, __va_list_tag
(*) [1], diagnostic_t)
???:0
0x2628d71 warning(diagnostic_option_id, char const*, ...)
???:0
0xa0d188 build_type_attribute_qual_variant(tree_node*, tree_node*, int)
???:0
0x264dec3 pretty_printer::format(text_info&)
???:0
0x260c2e6 diagnostic_context::report_diagnostic(diagnostic_info*)
???:0
0x260c7a5 diagnostic_context::diagnostic_impl(rich_location*,
diagnostic_metadata const*, diagnostic_option_id, char const*, __va_list_tag
(*) [1], diagnostic_t)
???:0
0x2629dff error_at(unsigned long, char const*, ...)
???:0
0xa56ae2 build_component_ref(unsigned long, tree_node*, tree_node*, unsigned
long, unsigned long, bool)
???:0
0xabbbee c_parse_file()
???:0
0xb3c959 c_common_parse_file()
???:0
Godbolt url: https://godbolt.org/z/9nMEo96as
