Fix bug when multiple $else clauses followed an $if #1824.

releasenotes.md

@@ -31,6 +31,7 @@
 - Handle bytes and string literals the same way in terms of zero termination.
 - Function comments are stored and displayed with -P.
 - Prevent `#hash` arguments from taking code that modifies ct variables. #1794
+
 ### Fixes
 - Fix case trying to initialize a `char[*]*` from a String.
 - Fix Map & HashMap `put_all_for_create` not copying all elements, causing `init_from_map` to create incomplete copy.
@@ -79,6 +80,7 @@
 - Assert when partially initializing a constant struct containing a slice #1812.
 - Assert concatenating constant slices #1805.
 - Do not link "ld" on Linux with no libc.
+- Fix bug when multiple `$else` clauses followed an `$if` #1824.
 
 ### Stdlib changes
 - Increase BitWriter.write_bits limit up to 32 bits.

src/compiler/parse_stmt.c

@@ -1040,7 +1040,7 @@ static inline Ast *parse_ct_if_stmt(ParseContext *c)
 		if (!parse_ct_compound_stmt(c, &else_ast->ct_else_stmt)) return poisoned_ast;
 		ast->ct_if_stmt.elif = astid(else_ast);
 	}
-	advance_and_verify(c, TOKEN_CT_ENDIF);
+	CONSUME_OR_RET(TOKEN_CT_ENDIF, poisoned_ast);
 	RANGE_EXTEND_PREV(ast);
 	return ast;
 }

test/test_suite/compile_time/ct_else_else.c3

@@ -0,0 +1,8 @@
+// Issue #1824
+fn void main()
+{
+  $if true:
+  $else
+  $else // #error: Expected '$endif'
+  $endif
+}