From: sawadatsuyoshi@... Date: 2016-02-29T18:08:16+00:00 Subject: [ruby-core:74057] [Ruby trunk Bug#12128] Strings in `ARGV` are frozen Issue #12128 has been reported by Tsuyoshi Sawada. ---------------------------------------- Bug #12128: Strings in `ARGV` are frozen https://bugs.ruby-lang.org/issues/12128 * Author: Tsuyoshi Sawada * Status: Open * Priority: Normal * Assignee: * ruby -v: 2.3 * Backport: 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN ---------------------------------------- It is not clear how the frozen status of strings in `ARGV` are to be described, but regardless of what I try to do (i.e. set frozen string pragma as false, which is probably irrelevant because the strings are already created at the time of file load), the strings appear frozen. I ran the following file `foo.rb` as `ruby foo.rb bar`: ~~~RUBY #!/usr/bin/env ruby # frozen_string_literal: false ARGV.first.frozen? #=> true ARGV.first.upcase! #=> can't modify frozen String (RuntimeError) ~~~ I believe this is a bug. If not, I would like to know what determines the frozen status of the strings in `ARGV`. Is it a feature that they are always frozen? -- https://bugs.ruby-lang.org/ Unsubscribe: