Fixed bug in parser that resulted in crash when a soft keyword was used as a class pattern keyword argument name.

msfterictraut · msfterictraut · commit 91f3fdf3b83e · 2022-08-15T09:30:10.000-07:00
diff --git a/packages/pyright-internal/src/parser/parser.ts b/packages/pyright-internal/src/parser/parser.ts
@@ -1080,9 +1080,11 @@ export class Parser {
             secondToken.type === TokenType.Operator &&
             (secondToken as OperatorToken).operatorType === OperatorType.Assign
         ) {
-            this._getNextToken();
-            keywordName = NameNode.create(firstToken as IdentifierToken);
-            this._getNextToken();
+            const classNameToken = this._getTokenIfIdentifier();
+            if (classNameToken !== undefined) {
+                keywordName = NameNode.create(classNameToken);
+                this._getNextToken();
+            }
         }
 
         const pattern = this._parsePatternAs();
