https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119755
Nathaniel Shead <nshead at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |nshead at gcc dot
gnu.org
--- Comment #4 from Nathaniel Shead <nshead at gcc dot gnu.org> ---
Reduced:
// std.cc
export module std;
template <typename _Out> void format(_Out) {
constexpr int __term = 0;
[&] { __term; };
}
export inline void vformat() {
format(0);
}
// std.compat.cc
import std;
int x = (vformat(), 0);
$ g++ -fmodules -S std.cc std.compat.cc
In module imported at std.compat.ii:1:1:
std: error: failed to read compiled module cluster 2: Bad file data
std: note: compiled module file is ‘gcm.cache/std.gcm’
std: error: failed to read compiled module cluster 3: Bad file data
std.compat.cc:2:10: fatal error: failed to load binding ‘::vformat@std’
2 | int x = (vformat(), 0);
| ^~~~~~~
compilation terminated.
The issue appears to be that when loading the lambda we look for '__term' as a
member in its context, but it actually lives outside the lambda so it isn't
found and we bail.
