From 84dccb35f7809a3cd00c6b11d0a9aa40b70e045f Mon Sep 17 00:00:00 2001
From: Nicholas Clark <nick@ccl4.org>
Date: Wed, 26 Sep 2007 16:32:45 +0000
Subject: [PATCH] Change 31977 introduced a bug (failing to set the return
 value of mro::get_linear_isa() when passed a second parameter). However,
 there were no tests for this. Fix both.

p4raw-id: //depot/perl@31981
---
 mro.c         |  2 +-
 t/mro/basic.t | 21 ++++++++++++++++-----
 2 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/mro.c b/mro.c
index 525076f..f3db774 100644
--- a/mro.c
+++ b/mro.c
@@ -718,7 +718,7 @@ XS(XS_mro_get_linear_isa) {
 	const struct mro_alg *const algo = S_get_mro_from_name(aTHX_ which);
 	if (!algo)
 	    Perl_croak(aTHX_ "Invalid mro name: '%s'", which);
-	algo->resolve(aTHX_ class_stash, 0);
+	RETVAL = algo->resolve(aTHX_ class_stash, 0);
     }
     else {
         RETVAL = mro_get_linear_isa(class_stash);
diff --git a/t/mro/basic.t b/t/mro/basic.t
index 695306c..a4a6192 100644
--- a/t/mro/basic.t
+++ b/t/mro/basic.t
@@ -3,7 +3,7 @@
 use strict;
 use warnings;
 
-require q(./test.pl); plan(tests => 29);
+require q(./test.pl); plan(tests => 35);
 
 {
     package MRO_A;
@@ -20,18 +20,29 @@ require q(./test.pl); plan(tests => 29);
     our @ISA = qw/MRO_D MRO_E/;
 }
 
+my @MFO_F_DFS = qw/MRO_F MRO_D MRO_A MRO_B MRO_C MRO_E/;
+my @MFO_F_C3 = qw/MRO_F MRO_D MRO_E MRO_A MRO_B MRO_C/;
 is(mro::get_mro('MRO_F'), 'dfs');
 ok(eq_array(
-    mro::get_linear_isa('MRO_F'),
-    [qw/MRO_F MRO_D MRO_A MRO_B MRO_C MRO_E/]
+    mro::get_linear_isa('MRO_F'), \@MFO_F_DFS
 ));
+
+ok(eq_array(mro::get_linear_isa('MRO_F', 'dfs'), \@MFO_F_DFS));
+ok(eq_array(mro::get_linear_isa('MRO_F', 'c3'), \@MFO_F_C3));
+eval{mro::get_linear_isa('MRO_F', 'C3')};
+like($@, qr/^Invalid mro name: 'C3'/);
+
 mro::set_mro('MRO_F', 'c3');
 is(mro::get_mro('MRO_F'), 'c3');
 ok(eq_array(
-    mro::get_linear_isa('MRO_F'),
-    [qw/MRO_F MRO_D MRO_E MRO_A MRO_B MRO_C/]
+    mro::get_linear_isa('MRO_F'), \@MFO_F_C3
 ));
 
+ok(eq_array(mro::get_linear_isa('MRO_F', 'dfs'), \@MFO_F_DFS));
+ok(eq_array(mro::get_linear_isa('MRO_F', 'c3'), \@MFO_F_C3));
+eval{mro::get_linear_isa('MRO_F', 'C3')};
+like($@, qr/^Invalid mro name: 'C3'/);
+
 my @isarev = sort { $a cmp $b } @{mro::get_isarev('MRO_B')};
 ok(eq_array(
     \@isarev,
-- 
2.7.4