Fixes #37060 - Distinguish between bytes and chars

theforeman · Jan 30, 2024 · 29d288e · 29d288e
1 parent abbe071
commit 29d288e
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Showing 2 changed files with 7 additions and 1 deletion.
diff --git a/lib/smart_proxy_dynflow/io_buffer.rb b/lib/smart_proxy_dynflow/io_buffer.rb
@@ -88,7 +88,7 @@ def read_available!
       def write_available!
         until @buffer.empty?
           n = @io.write_nonblock(@buffer)
-          @buffer = @buffer[n..-1]
+          @buffer = @buffer.bytes.drop(n).pack('c*')
         end
       rescue IO::WaitWritable # rubocop:disable Lint/SuppressedException
       rescue EOFError

diff --git a/test/io_buffer_test.rb b/test/io_buffer_test.rb
@@ -60,6 +60,12 @@ class CustomWaitWritable < RuntimeError
           buffer.write_available!
           assert_equal buffer.to_s, 'ello'
         end
+
+        it 'can deal with wide characters' do
+          buffer.add_data('ラジオで勉強しました')
+          buffer.write_available! # This would raise an exception
+          assert_equal buffer.to_s, ''
+        end
       end
 
       describe '#read_available!' do