Danny Milosavljevic <dan...@scratchpost.org> writes: > Hi, > > On Tue, 15 Jan 2019 10:43:49 -0500 > Joshua Branson <jbra...@dismail.de> wrote: > >> I'm not certain if this is the right list to report this to, but I just >> installed autoscan version 2.21, and it gave me this warning: >> >> #BEGIN_SRC sh >> autoscan >> #END_SRC >> >> Unescaped left brace in regex is deprecated here (and will be fatal >> in Perl 5.30), passed through in regex; marked by <-- HERE in m/\${ >> <-- HERE [^\}]*}/ at /home/joshua/.guix-profile/bin/autoscan line >> 361. >> >> >> Should I report this upstream instead? > > I think so, yes. > > autoscan is part of autoconf 2.21, so the bug report should go to the > autoconf package. > > The regexp in question is > > s/\${[^\}]*}//g; > > Perl is complaining because perl regexp use curly braces to specify a range > of valid repeats. > Maybe the easiest way to understand it is that the following equivalences > hold in regexps: > > ? is equivalent to {0,1} > + is equivalent to {1,} > * is equivalent to {0,} > > The above (at the end of the regexp "\${[^\}]*}") probably means a literal > curly > brace--but they don't escape it - hence the warning. > > It's only a warning because no valid repeat range can start with a closing > curly > brace. > So perl can still figure out what you meant. > > But it's obviously not recommended to use unescaped closing curly braces to > match a literal closing curly brace regardless. >
Ok, I'll report this upstream. Thanks for flushing out the main issue! -- Joshua Branson Sent from Emacs and Gnus