[Octave-bug-tracker] [bug #54691] Many warnings appear, e.g. when using help ( "Unescaped left brace in regex is deprecated here")

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?54691>

                 Summary: Many warnings appear, e.g. when using help (
"Unescaped left brace in regex is deprecated here")
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Wed 19 Sep 2018 02:02:15 PM UTC
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
             Assigned to: None
         Originator Name: aj
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.4.1
        Operating System: Any

    _______________________________________________________

Details:

If you use the help command, a bunch of "Unescaped left brace in regex is
deprecated here" warnings appear. An example is shown below. Such messages
also appear if you try to use a function (e.g. filter()) with invalid input
arguments or no input arguments at all.

This probably depends on the Perl version which is used.

Tested with Octave 4.4.1 on Arch Linux x86-64. perl --version says:

This is perl 5, version 28, subversion 0 (v5.28.0) built for
x86_64-linux-thread-multi


Example:


>> help filter
Unescaped left brace in regex is deprecated here (and will be fatal in Perl
5.32), passed through in regex; marked by <-- HERE in
m/^\s+@([[:alnum:]][[:alnum:]\-]*)({ <-- HERE })?\s*/ at
/usr/share/texinfo/Texinfo/Parser.pm line 5481.
Unescaped left brace in regex is deprecated here (and will be fatal in Perl
5.32), passed through in regex; marked by <-- HERE in
m/^\s+@([[:alnum:]][[:alnum:]\-]*)({ <-- HERE
})?\s*(\@(c|comment)((\@|\s+).*)?)?/ at /usr/share/texinfo/Texinfo/Parser.pm
line 5485.
'filter' is a built-in function from the file libinterp/corefcn/filter.cc

 -- Y = filter (B, A, X)
 -- [Y, SF] = filter (B, A, X, SI)
...




    _______________________________________________________

Reply to this item at:

  <https://savannah.gnu.org/bugs/?54691>

_______________________________________________
  Message sent via Savannah
  https://savannah.gnu.org/