Correctly error on @attrdef Foo = ;.

releasenotes.md

@@ -15,6 +15,7 @@
 - Fix No index OOB check for `[:^n]` #2123.
 - Fix regression in Time diff due to operator overloading #2124.
 - attrdef with any invalid name causes compiler assert #2128.
+- Correctly error on `@attrdef Foo = ;`.
 
 ### Stdlib changes
 - Added `String.quick_ztr` and `String.is_zstr`

src/compiler/parse_global.c

@@ -2229,6 +2229,12 @@ static inline Decl *parse_attrdef(ParseContext *c)
 	if (try_consume(c, TOKEN_EOS)) return decl;
 
 	CONSUME_OR_RET(TOKEN_EQ, poisoned_decl);
+	if (tok_is(c, TOKEN_EOS))
+	{
+		PRINT_ERROR_LAST("Expected a list of attributes after '='.");
+		return poisoned_decl;
+	}
+
 	bool is_cond;
 	bool is_builtin = false;
 	if (!parse_attribute_list(c, &attributes, NULL, decl_needs_prefix(decl) ? &is_builtin : NULL, &is_cond, true)) return poisoned_decl;

test/test_suite/attributes/attrdef_err.c3

@@ -0,0 +1,6 @@
+
+attrdef @Foo = ; // #error: Expected a list of attributes after
+fn void main()
+{
+
+}