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-rw-r--r--test/ruby/test_string.rb8
1 files changed, 8 insertions, 0 deletions
diff --git a/test/ruby/test_string.rb b/test/ruby/test_string.rb
index dc76b53810..0fd0538d00 100644
--- a/test/ruby/test_string.rb
+++ b/test/ruby/test_string.rb
@@ -444,6 +444,14 @@ CODE
s = S("").freeze
assert_raise_with_message(RuntimeError, /frozen/) {s.chomp!}
+
+ s = S("ax")
+ o = Struct.new(:s).new(s)
+ def o.to_str
+ s.freeze
+ "x"
+ end
+ assert_raise_with_message(RuntimeError, /frozen/) {s.chomp!(o)}
ensure
$/ = save
end