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e3ccb68610
Long-standing problem in one of the corner cases of rename(2): If we rename a directory a check is performed to see if newpath is identical to oldpath or a subdir of oldpath. This check is (accidentally? no hints anywhere in ChangeLogs or code) performed case-insensitive for as long as we use Unicode paths and NT functions. This leads to the problems described in https://cygwin.com/ml/cygwin/2016-09/msg00264.html Change this to be conditional case-sensitive as all other checks but let's take this with a grain of salt. There may be corner-cases in this corner-case which require to chek parts of the path always case-insensitive. Off the top of my head I can't construct such a case but that's no proof they don't exist :} Signed-off-by: Corinna Vinschen <corinna@vinschen.de>