[perl #71870] Use of uninitialized value in bitwise and B::Deparse

It's better to just silence it in Deparse rather than stopping
B::PMOP::reflags from returning undef because of a non-constant regexp.
That way, we keep the possibility to test for this situation, and it stays
in line with B::PMOP::pregcomp.

Also bump $B::Deparse::VERSION.

2 files changed, 10 insertions, 3 deletions

diff --git a/dist/B-Deparse/Deparse.pm b/dist/B-Deparse/Deparse.pm
index 93e250fd56..7c82c3ad4e 100644
--- a/dist/B-Deparse/Deparse.pm
+++ b/dist/B-Deparse/Deparse.pm
@@ -23,7 +23,7 @@ use B qw(class main_root main_start main_cv svref_2object opnumber perlstring
 	 PMf_MULTILINE PMf_SINGLELINE PMf_FOLD PMf_EXTENDED),
 	 ($] < 5.009 ? 'PMf_SKIPWHITE' : 'RXf_SKIPWHITE'),
 	 ($] < 5.011 ? 'CVf_LOCKED' : ());
-$VERSION = 0.93;
+$VERSION = 0.94;
 use strict;
 use vars qw/$AUTOLOAD/;
 use warnings ();
@@ -4311,10 +4311,11 @@ sub pp_split {
     }
 
     # handle special case of split(), and split(' ') that compiles to /\s+/
+    # Under 5.10, the reflags may be undef if the split regexp isn't a constant
     $kid = $op->first;
     if ( $kid->flags & OPf_SPECIAL
 	 and ( $] < 5.009 ? $kid->pmflags & PMf_SKIPWHITE()
-	      : $kid->reflags & RXf_SKIPWHITE() ) ) {
+	      : ($kid->reflags || 0) & RXf_SKIPWHITE() ) ) {
 	$exprs[0] = "' '";
     }
 
diff --git a/dist/B-Deparse/t/deparse.t b/dist/B-Deparse/t/deparse.t
index 191324a7c3..0404ab35f5 100644
--- a/dist/B-Deparse/t/deparse.t
+++ b/dist/B-Deparse/t/deparse.t
@@ -17,7 +17,7 @@ BEGIN {
     require feature;
     feature->import(':5.10');
 }
-use Test::More tests => 83;
+use Test::More tests => 84;
 use Config ();
 
 use B::Deparse;
@@ -615,3 +615,9 @@ my @b;
 @a = reverse @a;
 @b = reverse @b;
 ();
+####
+my($r, $s, @a);
+@a = split(/foo/, $s, 0);
+$r = qr/foo/;
+@a = split(/$r/, $s, 0);
+();