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-rw-r--r--test/ruby/test_m17n.rb7
1 files changed, 7 insertions, 0 deletions
diff --git a/test/ruby/test_m17n.rb b/test/ruby/test_m17n.rb
index 5d5b183c67..590b22f18f 100644
--- a/test/ruby/test_m17n.rb
+++ b/test/ruby/test_m17n.rb
@@ -721,6 +721,13 @@ class TestM17N < Test::Unit::TestCase
s = "abc".force_encoding(Encoding::ASCII_8BIT)
t = s.gsub(/b/, "\xa1\xa1".force_encoding("euc-jp"))
assert_equal(Encoding::ASCII_8BIT, s.encoding)
+
+ assert_raise(ArgumentError) {
+ "abc".gsub(/[ac]/) {
+ $& == "a" ? "\xc2\xa1".force_encoding("euc-jp") :
+ "\xc2\xa1".force_encoding("utf-8")
+ }
+ }
end
def test_regexp_match