Resolve exception when Error.stackTraceLimit is undefined

Some applications may explicitly set Error.stackTraceLimit = undefined. In this case it is not safe to assume new Error().stack is available.

packages/grpc-js/src/client.ts

@@ -110,7 +110,7 @@ export type ClientOptions = Partial<ChannelOptions> & {
 };
 
 function getErrorStackString(error: Error): string {
-  return error.stack!.split('\n').slice(1).join('\n');
+  return error.stack?.split('\n').slice(1).join('\n') || 'no stack trace available';
 }
 
 /**