Avoid trying to add data to an unknown package idHEADmaster

Can happen when you connect to an already running proxy, as the proxy
might send you data updates for packages that you haven't received.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/monitor-gui.cc b/src/monitor-gui.cc
index c4152b0..fdfbe80 100644
--- a/src/monitor-gui.cc
+++ b/src/monitor-gui.cc
@@ -1244,6 +1244,8 @@ public:
                     struct timespec timestamp) override {
     assert(monitor == monitor_.get());
     auto index = packages_->package_data(id, data, size, last, timestamp);
+    if (index == std::string::npos)
+      return;
     auto const& pkg = packages_->package(index);
     protocols_->update(index, pkg.data.data(), pkg.data.size());
     if (has_selection_ && index == selection_) {