Tests for commit 1375cf1cf2085f851bb176047d5e60248542f555

diff --git a/t/op/universal.t b/t/op/universal.t
index a1ff975..a24d7aa 100644 (file)
--- a/t/op/universal.t
+++ b/t/op/universal.t
@@ -10,7 +10,7 @@ BEGIN {
     require "./test.pl";
 }
 
-plan tests => 117;
+plan tests => 123;
 
 $a = {};
 bless $a, "Bob";
@@ -253,3 +253,57 @@ use warnings "deprecated";
     like($m, qr/^UNIVERSAL->import is deprecated/,
        "deprecation warning for UNIVERSAL->import");
 }
+
+# Test: [perl #66112]: change @ISA inside  sub isa
+{
+    package RT66112::A;
+
+    package RT66112::B;
+
+    sub isa {
+       my $self = shift;
+       @ISA = qw/RT66112::A/;
+       return $self->SUPER::isa(@_);
+    }
+
+    package RT66112::C;
+
+    package RT66112::D;
+
+    sub isa {
+       my $self = shift;
+       @RT66112::E::ISA = qw/RT66112::A/;
+       return $self->SUPER::isa(@_);
+    }
+
+    package RT66112::E;
+
+    package main;
+
+    @RT66112::B::ISA = qw//;
+    @RT66112::C::ISA = qw/RT66112::B/;
+    @RT66112::T1::ISA = qw/RT66112::C/;
+    ok(RT66112::T1->isa('RT66112::C'), "modify \@ISA in isa (RT66112::T1 isa RT66112::C)");
+
+    @RT66112::B::ISA = qw//;
+    @RT66112::C::ISA = qw/RT66112::B/;
+    @RT66112::T2::ISA = qw/RT66112::C/;
+    ok(RT66112::T2->isa('RT66112::B'), "modify \@ISA in isa (RT66112::T2 isa RT66112::B)");
+
+    @RT66112::B::ISA = qw//;
+    @RT66112::C::ISA = qw/RT66112::B/;
+    @RT66112::T3::ISA = qw/RT66112::C/;
+    ok(RT66112::T3->isa('RT66112::A'), "modify \@ISA in isa (RT66112::T3 isa RT66112::A)");
+
+    @RT66112::E::ISA = qw/RT66112::D/;
+    @RT66112::T4::ISA = qw/RT66112::E/;
+    ok(RT66112::T4->isa('RT66112::E'), "modify \@ISA in isa (RT66112::T4 isa RT66112::E)");
+
+    @RT66112::E::ISA = qw/RT66112::D/;
+    @RT66112::T5::ISA = qw/RT66112::E/;
+    ok(! RT66112::T5->isa('RT66112::D'), "modify \@ISA in isa (RT66112::T5 not isa RT66112::D)");
+
+    @RT66112::E::ISA = qw/RT66112::D/;
+    @RT66112::T6::ISA = qw/RT66112::E/;
+    ok(RT66112::T6->isa('RT66112::A'), "modify \@ISA in isa (RT66112::T6 isa RT66112::A)");
+}