Error message for casting generic to incompatible type does not work properly with nested generics #1953

releasenotes.md

@@ -36,6 +36,7 @@
 - The `%s` would not properly print function pointers.
 - Compiler crash when passing an untyped list as an argument to `assert` #2108.
 - `@ensure` should be allowed to read "out" variables. #2107
+- Error message for casting generic to incompatible type does not work properly with nested generics #1953
 
 ### Stdlib changes
 - Hash functions for integer vectors and arrays.

src/compiler/sema_decls.c

@@ -4757,6 +4757,10 @@ static bool sema_generate_parameterized_name_to_scratch(SemaContext *context, Mo
 			else
 			{
 				scratch_buffer_append(type->name);
+				if (type_is_user_defined(type) && type->decl->unit->module->generic_suffix)
+				{
+					scratch_buffer_append(type->decl->unit->module->generic_suffix);
+				}
 			}
 		}
 		else