Fix bug: symbol.valueDeclaration not guaranteed to be defined (#26267)

2025-11-18 17:21:48 +00:00 · 2018-08-07 12:13:45 -07:00
parent 32e99ba8f9
commit eaf0d59d35
6 changed files with 95 additions and 1 deletions
@@ -20861,7 +20861,7 @@ namespace ts {
                    // If func.parent is a class and symbol is a (readonly) property of that class, or
                    // if func is a constructor and symbol is a (readonly) parameter property declared in it,
                    // then symbol is writeable here.
-                    return !(func.parent === symbol.valueDeclaration.parent || func === symbol.valueDeclaration.parent);
+                    return !symbol.valueDeclaration || !(func.parent === symbol.valueDeclaration.parent || func === symbol.valueDeclaration.parent);
                }
                return true;
            }