compile-time re-eval count is not saved correctly

[atoomic]

This is an extract from t/split.t in the perl 5.26.0 test suite. ( the test can also be run under perl 5.24 )

When using 'our', the compiled version provides the same behavior as the uncompiled one.
With 'my' the value is incorrect once compiled

# uncompiled
> perl524 -e 'our $c = 0; @a = split /-(?{ $c++ })/, "a-b-c"; print qq[$c\n];'
2
> perl524 -e 'my $c = 0; @a = split /-(?{ $c++ })/, "a-b-c"; print qq[$c\n];'
2

# compiled
> perlcc -r -e 'our $c = 0; @a = split /-(?{ $c++ })/, "a-b-c"; print qq[$c\n];'
2
> perlcc -r -e 'my $c = 0; @a = split /-(?{ $c++ })/, "a-b-c"; print qq[$c\n];'
0

[atoomic]

I suspect one of the CvOutside is not set correctly

> perl -e 'my $c = 0; my $xy = $ENV{AAA} ? undef : "a-b-c"; @a = split /-(?{ $c++ })/, $xy; print qq[$c\n];'
2
> perlcc -r -e 'my $c = 0; my $xy = $ENV{AAA} ? undef : "a-b-c"; @a = split /-(?{ $c++ })/, $xy; print qq[$c\n];'
0