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-rw-r--r--tool/lib/envutil.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/tool/lib/envutil.rb b/tool/lib/envutil.rb
index 323d7100de..63e23ba957 100644
--- a/tool/lib/envutil.rb
+++ b/tool/lib/envutil.rb
@@ -53,7 +53,7 @@ module EnvUtil
@original_internal_encoding = Encoding.default_internal
@original_external_encoding = Encoding.default_external
@original_verbose = $VERBOSE
- @original_warning = %i[deprecated experimental].to_h {|i| [i, Warning[i]]}
+ @original_warning = %i[deprecated experimental].to_h {|i| [i, Warning[i]]} if RUBY_VERSION > "2.7"
end
end