&. is not allowed inside LHS of massign

https://hackerone.com/reports/605262

1 files changed, 6 insertions, 0 deletions

diff --git a/parse.y b/parse.y
index 6fc098bc6e..bf6c726024 100644
--- a/parse.y
+++ b/parse.y
@@ -1787,6 +1787,9 @@ mlhs_node	: user_variable
 		    }
 		| primary_value call_op tIDENTIFIER
 		    {
+			if ($2 == tANDDOT) {
+			    yyerror1(&@2, "&. inside LHS of multiple assignment");
+			}
 		    /*%%%*/
 			$$ = attrset(p, $1, $2, $3, &@$);
 		    /*% %*/
@@ -1801,6 +1804,9 @@ mlhs_node	: user_variable
 		    }
 		| primary_value call_op tCONSTANT
 		    {
+			if ($2 == tANDDOT) {
+			    yyerror1(&@2, "&. inside LHS of multiple assignment");
+			}
 		    /*%%%*/
 			$$ = attrset(p, $1, $2, $3, &@$);
 		    /*% %*/