https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116659
Bug ID: 116659
Summary: ICE: in import_module, at cp/module.cc:19733 with
#pragma GCC optimize("Ofast")
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: iamanonymous.cs at gmail dot com
Target Milestone: ---
*******************************************************************************
OS and Platform:
$ uname -a:
Linux 65dac7c84719 4.15.0-213-generic #224-Ubuntu SMP Mon Jun 19 13:30:12 UTC
2023 x86_64 x86_64 x86_64 GNU/Linux
*******************************************************************************
gcc version:
Using built-in specs.
COLLECT_GCC=/home/software/gcc-trunk-3aa004f/bin/gcc
COLLECT_LTO_WRAPPER=/home/software/gcc-trunk-3aa004f/libexec/gcc/x86_64-pc-linux-gnu/15.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --disable-multilib --disable-bootstrap
--enable-languages=c,c++ --prefix=/home/software/gcc-trunk-3aa004f
--enable-coverage
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 15.0.0 20240630 (experimental) (GCC)
*******************************************************************************
Program:
$ cat mutant.C
#pragma GCC optimize("Ofast")
export module a;
import a;
Compiler dose not ICE without #pragma GCC optimize("Ofast"), and it dose not
ICE compiled with -Ofast.
*******************************************************************************
Command Lines:
$ gcc -fmodules-ts mutant.C
mutant.C:3:8: error: module-declaration only permitted as first declaration, or
ending a global module fragment
3 | export module a;
| ^~~~~~
mutant.C:4:10: internal compiler error: in import_module, at cp/module.cc:19733
4 | import a;
| ^
0x576c1eb diagnostic_context::report_diagnostic(diagnostic_info*)
???:0
0x576cabd diagnostic_context::diagnostic_impl(rich_location*,
diagnostic_metadata const*, int, char const*, __va_list_tag (*) [1],
diagnostic_t)
???:0
0x578c98b internal_error(char const*, ...)
???:0
0x576d000 fancy_abort(char const*, int, char const*)
???:0
0x120c28c import_module(module_state*, unsigned int, bool, tree_node*,
cpp_reader*)
???:0
0x1378350 c_parse_file()
???:0
0x171c898 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.
Also ICE on trunk.
Compiler Explorer: https://godbolt.org/z/E8TTEb931
