Fixed type guard for non-Typed instances (#4087).

2023-06-06 21:24:02 -04:00 · 2023-06-06 21:24:02 -04:00 · 20c3d1b109
commit 20c3d1b109
parent bb8685b112
1 changed files with 4 additions and 1 deletions
--- a/src.ts/abi/typed.ts
+++ b/src.ts/abi/typed.ts
@ -771,7 +771,10 @@ export class Typed {
     *  Returns true only if %%value%% is a [[Typed]] instance.
     */
    static isTyped(value: any): value is Typed {
-        return (value && value._typedSymbol === _typedSymbol);
+        return (value
+            && typeof(value) === "object"
+            && "_typedSymbol" in value
+            && value._typedSymbol === _typedSymbol);
    }

    /**