Fix deparsing of subs named :::: and ::::::

Since a name like :::: is now divided up as ::/:: (since commit
088225f), there can be a package called ‘::’. But %:: returns %main::,
not %main::::. The result is that the main package is searched again
and again recursively and stash_subs hangs.

The easiest fix is to put main:: at the beginning of a substash’s name
when fetching the stash.

2 files changed, 13 insertions, 1 deletions

diff --git a/dist/B-Deparse/Deparse.pm b/dist/B-Deparse/Deparse.pm
index 3f3c1e8204..f3c304f826 100644
--- a/dist/B-Deparse/Deparse.pm
+++ b/dist/B-Deparse/Deparse.pm
@@ -480,7 +480,7 @@ sub stash_subs {
     else {
 	$pack =~ s/(::)?$/::/;
 	no strict 'refs';
-	$stash = \%$pack;
+	$stash = \%{"main::$pack"};
     }
     my %stash = svref_2object($stash)->ARRAY;
     while (my ($key, $val) = each %stash) {
diff --git a/dist/B-Deparse/t/deparse.t b/dist/B-Deparse/t/deparse.t
index c3301a50db..8138ecd7cf 100644
--- a/dist/B-Deparse/t/deparse.t
+++ b/dist/B-Deparse/t/deparse.t
@@ -170,6 +170,18 @@ eval <<EOFCODE and test($x);
    1
 EOFCODE
 
+# Exotic sub declarations
+$a = `$^X $path "-MO=Deparse" -e "sub ::::{}sub ::::::{}" 2>&1`;
+$a =~ s/-e syntax OK\n//g;
+is($a, <<'EOCODG', "sub :::: and sub ::::::");
+sub :::: {
+    
+}
+sub :::::: {
+    
+}
+EOCODG
+
 # [perl #33752]
 {
   my $code = <<"EOCODE";