[perl #74740] Deparse -(f()) correctly

-(f()) was being deparsed as -f(), which is a filetest operator.

Extra parens are needed for negation if the child op deparses with a
single letter at the beginning.

2 files changed, 10 insertions, 1 deletions

diff --git a/dist/B-Deparse/Deparse.pm b/dist/B-Deparse/Deparse.pm
index 821cce146f..10ab49810c 100644
--- a/dist/B-Deparse/Deparse.pm
+++ b/dist/B-Deparse/Deparse.pm
@@ -1629,7 +1629,13 @@ sub pfixop {
     my($op, $cx, $name, $prec, $flags) = (@_, 0);
     my $kid = $op->first;
     $kid = $self->deparse($kid, $prec);
-    return $self->maybe_parens(($flags & POSTFIX) ? "$kid$name" : "$name$kid",
+    return $self->maybe_parens(($flags & POSTFIX)
+				 ? "$kid$name"
+				   # avoid confusion with filetests
+				 : $name eq '-'
+				   && $kid =~ /^[a-zA-Z](?!\w)/
+					? "$name($kid)"
+					: "$name$kid",
 			       $cx, $prec);
 }
 
diff --git a/dist/B-Deparse/t/deparse.t b/dist/B-Deparse/t/deparse.t
index 8f2a4b80b0..d71eeaafac 100644
--- a/dist/B-Deparse/t/deparse.t
+++ b/dist/B-Deparse/t/deparse.t
@@ -878,3 +878,6 @@ CORE::do({});
 # [perl #63558] open local(*FH)
 open local *FH;
 pipe local *FH, local *FH;
+####
+# [perl #74740] -(f()) vs -f()
+$_ = -(f());