Re: verify-visited-file-modtime

[Richard Stallman]

    If the buffer has stored (via the value -1) that the file does not
    exist and the file does not exist on disk either, then the buffer's
    record agrees with the actual situation on disk.  I do not know which
    "untame" errors one had in mind here where
    `verify-visited-file-modtime' should return nil in this situation.

The idea is that tame errors in this context mean that the name
doesn't exist, where as the other errors (not tame) indicate difficulty
in finding out whether the name exists.