reverted the change according to comment below:

#431 (comment)
rubyzip · Feb 8, 2020 · 976dbd3 · 976dbd3
1 parent b326d17
commit 976dbd3
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lib/zip/file.rb b/lib/zip/file.rb
@@ -402,7 +402,7 @@ def get_entry(entry)
     # Creates a directory
     def mkdir(entryName, permissionInt = 0o755)
       raise Errno::EEXIST, "File exists - #{entryName}" if find_entry(entryName)
-      entryName = +entryName.to_s
+      entryName = entryName.dup.to_s
       entryName << '/' unless entryName.end_with?('/')
       @entry_set << ::Zip::StreamableDirectory.new(@name, entryName, nil, permissionInt)
     end