Re: backup-directory-alist not always honoured

[Richard Stallman]

    However, I recently found this backup file:

      
./cur/1165087471.P20227Q7.chrislap:2,S/1164450633.P2139Q0M622761.chrislap:2,S.~1~

    It is a backup of this file:

      ./cur/1164450633.P2139Q0M622761.chrislap:2,S

    For some reason it was created in:
      ./cur/1165087471.P20227Q7.chrislap:2,S/
    instead of in
      ./cur/Backup/
    as I would expect.

I looked at the code and I can't see any way that this failure could
happen.  I am stumped.

How about if you modify the function make-backup-file-name-1 to adde
data showing its argument and value at the end of a particular file.
Then, if the bug happens again, you can check that file and see what
make-backup-file-name-1 did on that occasion.  At least that way we
will find out if the bug is inside that function.