[Perl/perl5] 5fa8d5: [gh18540] Don't read before start of context stack...

[Hugo van der Sanden via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 5fa8d5db906c2b647f6651b061de02e805d898a1
      
https://github.com/Perl/perl5/commit/5fa8d5db906c2b647f6651b061de02e805d898a1
  Author: Hugo van der Sanden <h...@crypt.org>
  Date:   2021-02-08 (Mon, 08 Feb 2021)

  Changed paths:
    M pp_ctl.c

  Log Message:
  -----------
  [gh18540] Don't read before start of context stack in pp_return()

Add a guard to the chunk introduced by a1325b902d for "try" support.