--- a/src/core/lib/surface/call.cc
+++ b/src/core/lib/surface/call.cc
@@ -97,6 +97,8 @@
 #include "src/core/lib/transport/metadata_batch.h"
 #include "src/core/lib/transport/transport.h"
 
+#include <util/system/yassert.h>
+
 grpc_core::TraceFlag grpc_call_error_trace(false, "call_error");
 grpc_core::TraceFlag grpc_compression_trace(false, "compression");
 grpc_core::TraceFlag grpc_call_trace(false, "call");
@@ -1729,7 +1731,7 @@
 
   InternalRef("completion");
   if (!is_notify_tag_closure) {
-    GPR_ASSERT(grpc_cq_begin_op(cq_, notify_tag));
+    Y_ABORT_UNLESS(grpc_cq_begin_op(cq_, notify_tag));
   }
   bctl->set_pending_ops(pending_ops);
 
--- a/src/core/ext/filters/client_channel/lb_policy/subchannel_list.h
+++ b/src/core/ext/filters/client_channel/lb_policy/subchannel_list.h
@@ -21,6 +21,7 @@
 
 #include <inttypes.h>
 #include <string.h>
+#include <util/system/compiler.h> // Y_NO_SANITIZE
 
 #include <memory>
 #include <util/generic/string.h>
@@ -360,7 +361,7 @@
 SubchannelList<SubchannelListType, SubchannelDataType>::SubchannelList(
     LoadBalancingPolicy* policy, const char* tracer,
     ServerAddressList addresses,
-    LoadBalancingPolicy::ChannelControlHelper* helper, const ChannelArgs& args)
+    LoadBalancingPolicy::ChannelControlHelper* helper, const ChannelArgs& args) Y_NO_SANITIZE("undefined")
     : DualRefCounted<SubchannelListType>(tracer),
       policy_(policy),
       tracer_(tracer) {