Don’t let ?: folding affect stat

stat(${\1} ? foo : bar) and stat(1 ? foo : bar) should behave the same
way, but were treated differently, due to the way ?: is folded in
the latter case.  Now that foldedness is recorded in the op tree
(cc2ebcd7902), we can use the OPpCONST_FOLDED flag to distinguish
stat(1 ? foo : bar) from stat(foo).

2 files changed, 10 insertions, 2 deletions

diff --git a/op.c b/op.c
index b5ebd79873..52e600ff8a 100644
--- a/op.c
+++ b/op.c
@@ -8130,7 +8130,8 @@ Perl_ck_ftst(pTHX_ OP *o)
 	SVOP * const kid = (SVOP*)cUNOPo->op_first;
 	const OPCODE kidtype = kid->op_type;
 
-	if (kidtype == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
+	if (kidtype == OP_CONST && (kid->op_private & OPpCONST_BARE)
+	 && !(kid->op_private & OPpCONST_FOLDED)) {
 	    OP * const newop = newGVOP(type, OPf_REF,
 		gv_fetchsv(kid->op_sv, GV_ADD, SVt_PVIO));
 #ifdef PERL_MAD
diff --git a/t/comp/fold.t b/t/comp/fold.t
index 69d1903a43..c600067542 100644
--- a/t/comp/fold.t
+++ b/t/comp/fold.t
@@ -4,7 +4,7 @@
 # we've not yet verified that use works.
 # use strict;
 
-print "1..23\n";
+print "1..25\n";
 my $test = 0;
 
 # Historically constant folding was performed by evaluating the ops, and if
@@ -132,3 +132,10 @@ package other { # hide the "ok" sub
  print " ", ++$test, " - print followed by const || URSINE\n";
  BEGIN { $^W = 1 }
 }
+
+# or stat
+print "not " unless stat(1 ? INSTALL : 0) eq stat("INSTALL");
+print "ok ", ++$test, " - stat(const ? word : ....)\n";
+# in case we are in t/
+print "not " unless stat(1 ? TEST : 0) eq stat("TEST");
+print "ok ", ++$test, " - stat(const ? word : ....)\n";