Reproduction steps:
1. Open a new or an existing project
2. Open the Package Manager window
3. Install the Burst package
4. Click on the newly appeared Jobs Menu Item

Reproducible with: 2018.4.20f1, 2019.2.0a1
Could not test with: 2017.4.39f1 (due to Package Manager not being present in this version)

First 5 lines of the stack trace:
#0 0x007f439f3e4cec in gtk_menu_get_attach_widget
#1 0x007f439f3e558f in gtk_menu_get_attach_widget
#2 0x007f439f3e5efc in gtk_menu_popup_at_widget
#3 0x007f439f3ecd0e in gtk_menu_item_get_type
#4 0x007f439f3ed773 in gtk_menu_item_toggle_size_allocate
#5 0x007f439e6a610d in g_closure_invoke

Notes:
- Not reproducible on WIndows
- Reproducible with any version of Burst
- The crash does not always produce a stack trace in the Editor.log