https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105901
Bug ID: 105901
Summary: [C++20] Code generation bug. Well-formed Program
segfaults.
Product: gcc
Version: 12.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: benni at stuerz dot xyz
Target Milestone: ---
Created attachment 53105
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53105&action=edit
The full source code.
GCC versions at least 10.1 to 12.1 (and trunk on godbolt.org) are affected.
System Type: Linux (x86_64)
Build with: g++ -std=c++20 -Wall -Wextra
The optimization level doesn't matter. And the compiler produces no warnings.
Substituting g++ with clang++ makes it work.
The attached file is a small project of mine to create a type-eraser for
"Printable things".
The expected output of the program:
[[10, 20, 30], Hello World, [A random struct (1), A random struct (2), A random
struct (3)]]
