[Perl/perl5] 484dbe: study_chunk: avoid transforming ops while enframed

[Hugo van der Sanden]

  Branch: refs/heads/gh16947-2
  Home:   https://github.com/Perl/perl5
  Commit: 484dbebe300e4fe10ef2027c1d5dd5fe0f060109
      
https://github.com/Perl/perl5/commit/484dbebe300e4fe10ef2027c1d5dd5fe0f060109
  Author: Hugo van der Sanden <h...@crypt.org>
  Date:   2020-04-12 (Sun, 12 Apr 2020)

  Changed paths:
    M regcomp.c

  Log Message:
  -----------
  study_chunk: avoid transforming ops while enframed

gh16947: the outer frame may be in the middle of looking at the part
of the program we would rewrite. Let the outer frame deal with it.