https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122019
Bug ID: 122019
Summary: ICE with modules and extern lambda
Product: gcc
Version: 15.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ingo at hannover dot ccc.de
Target Milestone: ---
Created attachment 62427
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=62427&action=edit
backtrace
The following code results in an ICE:
import std;
extern "C" auto foo = [] { std::format("bar"); };
Building with:
$ g++ -std=c++20 -fmodules -fsearch-include-path -c bits/std.cc -o /dev/null
$ g++ -std=c++20 -fmodules -freport-bug ice.cc
ice.cc:2:17: warning: ‘foo’ initialized and declared ‘extern’
2 | extern "C" auto foo = [] { std::format("bar"); };
| ^~~
ice.cc: In lambda function:
ice.cc:2:33: internal compiler error: Segmentation fault
2 | extern "C" auto foo = [] { std::format("bar"); };
| ^~~~~~
I know the code is weird, it was a (failed) experiment, but it should not
result in an ICE.
