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-rw-r--r--lib/resolv.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/resolv.rb b/lib/resolv.rb
index 08bfde583b..3b7ab2a394 100644
--- a/lib/resolv.rb
+++ b/lib/resolv.rb
@@ -1172,7 +1172,7 @@ class Resolv
@string = string
# case insensivity of DNS labels doesn't apply non-ASCII characters. [RFC 4343]
# This assumes @string is given in ASCII compatible encoding.
- @downcase = string.dup.force_encoding('ASCII-8BIT').downcase
+ @downcase = string.b.downcase
end
attr_reader :string, :downcase