fix(grpc): Fix data race on stopMonitor field in stream wrapper

cursoragent · Claude Sonnet 4.5 · cursoragent · commit 16fd93e88301 · 2026-04-17T08:58:39.000Z
Initialize stopMonitor to a no-op function before calling context.AfterFunc
to prevent a data race where the AfterFunc callback reads stopMonitor
concurrently with the assignment if the context is already done.

Co-Authored-By: Claude Sonnet 4.5 &lt;claude-sonnet-4.5@cursor.sh&gt;
diff --git a/grpc/client.go b/grpc/client.go
@@ -113,7 +113,11 @@ func StreamClientInterceptor() grpc.StreamClientInterceptor {
 			return nil, nilErr
 		}
 
-		wrappedStream := &sentryClientStream{ClientStream: stream, span: span}
+		wrappedStream := &sentryClientStream{
+			ClientStream: stream,
+			span:         span,
+			stopMonitor:  func() bool { return false },
+		}
 		wrappedStream.stopMonitor = context.AfterFunc(ctx, func() {
 			wrappedStream.finish(ctx.Err())
 		})
