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git-cola is a Python-powered GPL licensed GUI for git.
+
+Qt4 warning, the website says:
+
+"NOTE: We do not yet recommend using PyQt5 because there are known
+exit-on-segfault bugs in Qt5 that have not yet been addressed. git-cola
+is sensitive to this bug and is known to crash on exit when using git dag
+or the interactive rebase feature on PyQt5.
+
+QTBUG-52988 (https://bugreports.qt.io/browse/QTBUG-52988)
+
+PyQt4 is stable and there are no known issues when using it so we
+recommend using PyQt4 until the Qt5 bugs have been resolved.
+
+Set QT_API=pyqt4 in your environment if you have both versions of PyQt
+installed and want to ensure that PyQt4 is used.
+
+NOTE: git-cola includes a vendored copy of its QtPy dependency."
+
+That said, if you set QT_API=pyqt4 git-cola segfaults, but it works fine
+with Qt5 and PyQt5 from AlienBOB's repository.