https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124302
Bug ID: 124302
Summary: ICE in xref_basetypes, at cp/decl.cc:18541
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: suyuchang at whu dot edu.cn
Target Milestone: ---
Code:
template <struct a union a {} union a {
Command:
g++ -c test.cpp
Backtrace:
<source>:1:37: internal compiler error: in xref_basetypes, at cp/decl.cc:18541
1 | template <struct a union a {} union a {
| ^
0x2963338 diagnostics::context::diagnostic_impl(rich_location*,
diagnostics::metadata const*, diagnostics::option_id, char const*,
__va_list_tag (*) [1], diagnostics::kind)
???:0
0x295807b internal_error(char const*, ...)
???:0
0xb21a12 fancy_abort(char const*, int, char const*)
???:0
0xd6d023 c_parse_file()
???:0
0xef6ef9 c_common_parse_file()
???:0
/cefs/5b/5b7473000a337cbbdec6c161_gcc-trunk-20260226/bin/../libexec/gcc/x86_64-linux-gnu/16.0.1/cc1plus
-quiet -imultiarch x86_64-linux-gnu -iprefix
/cefs/5b/5b7473000a337cbbdec6c161_gcc-trunk-20260226/bin/../lib/gcc/x86_64-linux-gnu/16.0.1/
-D_GNU_SOURCE <source> -quiet -dumpdir /app/ -dumpbase output.cpp -dumpbase-ext
.cpp -masm=intel -mtune=generic -march=x86-64 -g -fdiagnostics-color=always
-fno-verbose-asm -o /app/output.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.
See Compiler Explorer: https://godbolt.org/z/Y7nzoedW3
This only occurs in GCC-trunk, and this also makes released GCC "confused by
earlier errors, bailing out".
The test case was generated by a fuzzer.
