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-rw-r--r--test/test_mwrap.rb3
1 files changed, 2 insertions, 1 deletions
diff --git a/test/test_mwrap.rb b/test/test_mwrap.rb
index 6522167..29bbdd2 100644
--- a/test/test_mwrap.rb
+++ b/test/test_mwrap.rb
@@ -250,7 +250,8 @@ class TestMwrap < Test::Unit::TestCase
           break
         end
       end
-      addr && addr.frozen? or abort 'Mwrap.each returned unfrozen address'
+      addr or abort 'Mwrap.each did not see any addresses'
+      addr.frozen? or abort 'Mwrap.each returned unfrozen address'
       loc = Mwrap[addr] or abort "Mwrap[#{addr}] broken"
       addr == loc.name or abort 'SourceLocation#name works on address'
       loc.name.frozen? or abort 'SourceLocation#name not frozen'