[Perl/perl5] 2583ef: Make scalar assignment to undef a compile time error

[Richard Leach via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 2583ef601d381a8a3e6e9b5f44db42bac0d537ab
      
https://github.com/Perl/perl5/commit/2583ef601d381a8a3e6e9b5f44db42bac0d537ab
  Author: Richard Leach <richardle...@users.noreply.github.com>
  Date:   2021-05-25 (Tue, 25 May 2021)

  Changed paths:
    M op.c
    M t/run/fresh_perl.t

  Log Message:
  -----------
  Make scalar assignment to undef a compile time error