https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100825
--- Comment #1 from vopl at bk dot ru ---
a little more minimized:
template <class> void foo() {} //1
void useFirst()
{
foo<int>();// call 1 - instantiate "void foo<int>()"
}
template <class> void foo() requires true {} //2
void useSecond()
{
foo<int>();// call 2 - instantiate "void foo<int>() requires true"
}
$ g++ -std=c++20 -c b.cpp
/tmp/ccnRtmjt.s: Assembler messages:
/tmp/ccnRtmjt.s:59: Error: symbol `_Z3fooIiEvv' is already defined
