Created attachment 1248394 [details] backtrace Description of problem: Version-Release number of selected component (if applicable): evolution-3.23.4-1.fc26.x86_64 webkitgtk4-plugin-process-gtk2-2.15.4-4.fc26.x86_64 webkitgtk4-doc-2.15.4-4.fc26.noarch webkitgtk4-devel-2.15.4-4.fc26.x86_64\ webkitgtk4-jsc-2.15.4-4.fc26.x86_64 webkitgtk4-jsc-devel-2.15.4-4.fc26.x86_64 webkitgtk4-2.15.4-4.fc26.x86_64 How reproducible: 100% Steps to Reproduce: 1. double click on an email to open it in an extra window (window1) 2. Edit as New Message (window2 appears) 3. close window1 (Ignore evolution's question "Should Evolution close this window when replying or forwarding?") Actual results: crash Expected results: window is closed without crashing evolution Additional info: bt attached
As we spoke on IRC, I'm pairing this with an upstream bug report.