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The test previously had the hardcoded assumption that /proc/self/status files had "Groups:" lines containing numerical IDs in ascending order. Because of the possibility of non-monotonic ordering of GIDs in user namespaces, this assumption was not universally true for all /proc/self/gid_map setups. To ensure this test can pass in those setups, sanity check failed "Groups:" line matches with a string sorted version of the expected values. (For the test cases here, numerical and string sorted order are guaranteed to match.) Fixes #46145 Change-Id: Ia060e80b123604bc394a15c02582fc406f944d36 Reviewed-on: https://go-review.googlesource.com/c/go/+/319591 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org> Trust: Tobias Klauser <tobias.klauser@gmail.com>