Issue #9314 has been updated by nobu (Nobuyoshi Nakada). Status changed from Open to Rejected There is no real encoding, "UTF-16". UTF-{16,32} encodings need endianness. ---------------------------------------- Bug #9314: String#encode method raises TypeError when called with Encoding::UTF_16 https://bugs.ruby-lang.org/issues/9314#change-43926 Author: krists.ozols (Krists Ozols) Status: Rejected Priority: Normal Assignee: Category: Target version: ruby -v: 2.1 Backport: 1.9.3: UNKNOWN, 2.0.0: UNKNOWN, 2.1: UNKNOWN It works with encodings like Encoding::UTF_8.. "test_string".encode(Encoding::UTF_8) # works "test_string".encode(Encoding::UTF_8.to_s) # works "test_string".encode(Encoding::UTF_16) # does not work. Error: `encode': no implicit conversion of Encoding into String (TypeError) from ... "test_string".encode(Encoding::UTF_16.to_s) # works it did not raise any errors in previous ruby versions. -- http://bugs.ruby-lang.org/