Handle return value of JS_ToFloat64

Fixes: #890

Author: saghul

quickjs.c

@@ -6765,7 +6765,9 @@ static void build_backtrace(JSContext *ctx, JSValue error_val, JSValue filter_fu
     saved_exception = JS_GetException(ctx);
 
     // Extract stack trace limit.
-    JS_ToFloat64(ctx, &d, ctx->error_stack_trace_limit);
+    if (JS_ToFloat64(ctx, &d, ctx->error_stack_trace_limit) < 0) {
+        // Ignore error since it sets d to NAN anyway.
+    }
     if (isnan(d) || d < 0.0)
         stack_trace_limit = 0;
     else if (d > INT32_MAX)