catch weird syntax errors with non-expr after binary op

diff --git a/src/parse/parser.c b/src/parse/parser.c
index 5774da3..639fec7 100644 (file)
--- a/src/parse/parser.c
+++ b/src/parse/parser.c
@@ -637,6 +637,7 @@ static sbAst parse_expr(hParser pr, u8 min_precedence) {
       if (rhs == NO_NODE) return syntax_error(pr);
     } else {
       rhs = parse_expr(pr, infix->right_precedence);
+      if (rhs == NO_NODE) return syntax_error(pr);
     }
 
     if (ast_type == AST_NODE_OP) {