.github/CONTRIBUTING.md: explain that compositors are unsupported (#2621)

diff --git a/.github/CONTRIBUTING.md b/.github/CONTRIBUTING.md
index 474355ad90f7a98c5325ce584f0ce871bf4c719b..c19ac81eb29e898e84b85a7b03061fae8b20548d 100644 (file)
--- a/.github/CONTRIBUTING.md
+++ b/.github/CONTRIBUTING.md
@@ -14,6 +14,9 @@ Note that bug reports and feature requests for related projects should be filed
    having access to the source code is too time-consuming. Additionally,
    experience has shown that often, the software in question is responsible for
    the issue. Please raise an issue with the software in question, not i3.
+5. Please note that i3 does not support compositors (e.g. compton). If you
+   encountered the issue you are about to report while using a compositor,
+   please try reproducing it without a compositor.
 
 ## Pull requests