Segfault with std.variant

[Ali Çehreli]

On 3/24/23 23:07, Mitchell wrote:

 >    variant["four"] = Variant(4); // Segfault

Today I learned that VariantN forwards to associative array operations. 
Cool I guess. :)

 > with a segfault. I'm using LDC2:

Same with dmd. It fails in the destructor of VariantN.

     static if (!AllowedTypes.length || 
anySatisfy!(hasElaborateDestructor, AllowedTypes))
     {
         ~this()
         {
             // Infer the safety of the provided types
             static if (AllowedTypes.length)
             {
                 if (0)
                 {
                     AllowedTypes var;
                 }
             }
             (() @trusted => fptr(OpID.destruct, &store, null))();
         }
     }

That @trusted lambda call segfaults.

This looks like a bug to me. Reported:

   https://issues.dlang.org/show_bug.cgi?id=23809

Ali