xcb-util-errors is a utility library that gives human readable names to error codes and event codes and also to major and minor numbers. The necessary information is drawn from xcb-proto's protocol descriptions. This library is especially useful when working with extensions and is mostly useful for debugging. All questions regarding this software should be directed at the XCB mailing list: https://lists.x.org/mailman/listinfo/xcb The primary development code repository can be found at: https://gitlab.freedesktop.org/xorg/lib/libxcb-errors Please submit bug reports and requests to merge patches there. For patch submission instructions, see: https://www.x.org/wiki/Development/Documentation/SubmittingPatches