Fix handshaker crash

1 files changed, 2 insertions, 1 deletions

diff --git a/src/core/ext/filters/client_channel/http_connect_handshaker.cc b/src/core/ext/filters/client_channel/http_connect_handshaker.cc
index 6bb4cefe73..88bcc03a3c 100644
--- a/src/core/ext/filters/client_channel/http_connect_handshaker.cc
+++ b/src/core/ext/filters/client_channel/http_connect_handshaker.cc
@@ -254,7 +254,8 @@ static void http_connect_handshaker_do_handshake(
   // If not found, invoke on_handshake_done without doing anything.
   const grpc_arg* arg =
       grpc_channel_args_find(args->args, GRPC_ARG_HTTP_CONNECT_SERVER);
-  if (arg == nullptr) {
+  if (arg == nullptr || arg->type != GRPC_ARG_STRING) {
+    gpr_log(GPR_INFO, "HTTP CONNECT channel arg not found or invalid");
     // Set shutdown to true so that subsequent calls to
     // http_connect_handshaker_shutdown() do nothing.
     gpr_mu_lock(&handshaker->mu);