Hi, On 2024-01-02 19:24, Christopher Yeleighton wrote: > Package: glibc-doc-reference > Version: 2.31-1 > Severity: normal > > Dear Maintainer, > > *** Reporter, please consider answering these questions, where appropriate *** > > * What led up to the situation? > > I used %s conversion to print a string to a file > and %7[^] conversion to scan it back.
%7[^] is not a valid format string. Quoting the manual, section 12.14.5: To read in characters that belong to an arbitrary set of your choice, use the ‘%[’ conversion. You specify the set between the ‘[’ character and a following ‘]’ character, using the same syntax used in regular expressions for explicit sets of characters. As special cases: - A literal ‘]’ character can be specified as the first character of the set. [...] - If a caret character ‘^’ immediately follows the initial ‘[’, then the set of allowed input characters is everything except the characters listed. In your case, you want to match up to 7 characters, but given there is no character or list of characters after the caret, it's not clear what you want to achieve. If you want to match everything but a ‘[’, you should use %7[^]] . Regards, Aurelien -- Aurelien Jarno GPG: 4096R/1DDD8C9B aurel...@aurel32.net http://aurel32.net