https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115257
Bug ID: 115257
Summary: Error when compiling a program with module and println
and auto
Product: gcc
Version: 14.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: paalon1936 at gmail dot com
Target Milestone: ---
When I tried to make a following program with module and <print> and autos,
failed to compile.
$ g++-14 -std=c++23 -fmodules-ts -x c++-system-header print
$ g++-14 -std=c++23 -fmodules-ts -Wall -Wextra -save-temps hello.cpp main.cpp
-o main
In file included from /usr/local/Cellar/gcc/14.1.0/include/c++/14/print:41,
of module /usr/local/Cellar/gcc/14.1.0/include/c++/14/print, imported at
hello.cpp:3,
of module hello, imported at main.cpp:1:
/usr/local/Cellar/gcc/14.1.0/include/c++/14/format: In instantiation of 'struct
std::__format::_Runtime_format_string<char>':
/usr/local/Cellar/gcc/14.1.0/include/c++/14/print:129:19: required from 'void
std::println(format_string<_Args ...>, _Args&& ...) [with _Args = {const char
(&)[4]}; format_string<_Args ...> = basic_format_string<char, const char
(&)[4]>]'
129 | { std::println(stdout, __fmt, std::forward<_Args>(__args)...); }
| ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
hello.cpp:7:21: required from 'auto hello::greeting@hello(const auto:1&)
[with auto:1 = char [4]]'
7 | std::println("Hello, {}!", x);
| ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
main.cpp:4:20: required from here
4 | hello::greeting("C++");
| ~~~~~~~~~~~~~~~^~~~~~~
/usr/local/Cellar/gcc/14.1.0/include/c++/14/format:74:55: internal compiler
error: Segmentation fault: 11
74 | template<typename _CharT, typename... _Args> struct
basic_format_string;
|
^~~~~~~~~~~~~~~~~~~
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
See <https://github.com/Homebrew/homebrew-core/issues> for instructions.
$ cat main-hello.ii
# 0 "hello.cpp"
# 0 "<built-in>"
# 0 "<command-line>"
# 1 "hello.cpp"
export module hello;
import "/usr/local/Cellar/gcc/14.1.0/include/c++/14/print";
export namespace hello {
auto greeting(auto const & x) {
std::println("Hello, {}!", x);
}
}
$ cat main-main.ii
# 0 "main.cpp"
# 0 "<built-in>"
# 0 "<command-line>"
# 1 "main.cpp"
import hello;
int main() {
hello::greeting("C++");
}
If I don't use module, but use `#include` then it works, and
if I don't use std::println of <print> and use std::cout of <iostream>, then it
works, and
if I don't use autos, and specify the types `void` and `char const *`, then it
works.
I'm using macOS Ventura 13.6.7, and GCC 14.1.0.
$ g++-14 --version
g++-14 (Homebrew GCC 14.1.0) 14.1.0
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