In _graphFollowsChanged, _it will be null as long as the search function is not used. Use row instead to send a signal to the graph widget when toggling the "Graph follows" checkbox to avoid a nullptr dereference / segfault. This will also make sure the marker on the graph points to the correct event when the user selects another event afer using the search function. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=219637 Signed-off-by: Ruben Devos <devosruben6@xxxxxxxxx> --- src/KsTraceViewer.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/KsTraceViewer.cpp b/src/KsTraceViewer.cpp index d4bf5f1..6efba7d 100644 --- a/src/KsTraceViewer.cpp +++ b/src/KsTraceViewer.cpp @@ -311,7 +311,7 @@ void KsTraceViewer::_graphFollowsChanged(int state) _graphFollows = (bool) state; if (_graphFollows && row != KS_NO_ROW_SELECTED) - emit select(*_it); // Send a signal to the Graph widget. + emit select(row); // Send a signal to the Graph widget. } void KsTraceViewer::_search() -- 2.47.1
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