From 21665b5f20fc7c96f4819bc1b754980e77849c05 Mon Sep 17 00:00:00 2001
From: Jesse Luehrs <doy@tozt.net>
Date: Thu, 29 Mar 2012 03:10:20 -0500
Subject: get rid of the _< thing if it's not a real filename

---
 lib/Eval/Closure.pm  | 13 ++++++++++++-
 t/clean-main-stash.t | 53 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 65 insertions(+), 1 deletion(-)
 create mode 100644 t/clean-main-stash.t

diff --git a/lib/Eval/Closure.pm b/lib/Eval/Closure.pm
index 161bcdf..46a3448 100644
--- a/lib/Eval/Closure.pm
+++ b/lib/Eval/Closure.pm
@@ -100,12 +100,23 @@ sub eval_closure {
     $args{source} = _canonicalize_source($args{source});
     _validate_env($args{environment} ||= {});
 
+    my $should_set_description = defined $args{description} && !($^P & 0x10);
+
     $args{source} = _line_directive(@args{qw(line description)})
                   . $args{source}
-        if defined $args{description} && !($^P & 0x10);
+        if $should_set_description;
+
+    my $existed_before;
+    $existed_before = exists $::{"_<$args{description}"}
+        if $should_set_description;
 
     my ($code, $e) = _clean_eval_closure(@args{qw(source environment)});
 
+    if (!$existed_before && $should_set_description) {
+        # this will be meaningless, and just leaks memory
+        delete $::{"_<$args{description}"};
+    }
+
     if (!$code) {
         if ($args{terse_error}) {
             die "$e\n";
diff --git a/t/clean-main-stash.t b/t/clean-main-stash.t
new file mode 100644
index 0000000..2aa0b9a
--- /dev/null
+++ b/t/clean-main-stash.t
@@ -0,0 +1,53 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+use Test::More;
+
+use Eval::Closure;
+
+{
+    my @keys_before = keys %::;
+
+    my $sub = eval_closure(
+        source      => 'sub { 1 }',
+        description => 'foo',
+    );
+
+    is_deeply([sort keys %::], [sort @keys_before]);
+}
+
+{
+    my @keys_before = keys %::;
+
+    my $sub = eval_closure(
+        source      => 'sub { 1 }',
+        line        => 100,
+    );
+
+    is_deeply([sort keys %::], [sort @keys_before]);
+}
+
+{
+    my @keys_before = keys %::;
+
+    my $sub = eval_closure(
+        source      => 'sub { 1 }',
+        description => 'foo',
+        line        => 100,
+    );
+
+    is_deeply([sort keys %::], [sort @keys_before]);
+}
+
+{
+    my @keys_before = keys %::;
+
+    my $sub = eval_closure(
+        source      => 'sub { 1 }',
+        description => __FILE__,
+    );
+
+    is_deeply([sort keys %::], [sort @keys_before]);
+}
+
+done_testing;
-- 
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