Bug #13540: can't set length of shared string (RuntimeError) when interpolating __FILE__ in a heredoc

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 2.4.1p111 (2017-03-22 revision 58053) [x86_64-darwin16]
• Backport: 2.2: DONTNEED, 2.3: DONTNEED, 2.4: DONE

[kylerippey (Kyle Rippey)]

There appears to be a bug in Ruby 2.4.0 and 2.4.1 when interpolating __FILE__ inside of a heredoc. In fact, no code in this file executes when this interpolation is present. Almost as if it's a syntax error, but it's reported as a RuntimeError.

# Works in Ruby 2.3 and 2.4
puts "#{__FILE__}"

# Works in Ruby 2.3 and 2.4
x = __FILE__
puts <<~HEREDOC
  #{x}
HEREDOC

# Works in Ruby 2.3
# Raises exception in Ruby 2.4: can't set length of shared string (RuntimeError)
puts <<~HEREDOC
  #{__FILE__}
HEREDOC

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed

Applied in changeset trunk|r58561.

---

parse.y: make shared string modifiable

• parse.y (dedent_string): ensure that the string is modifiable,
  not to set the length of shared string.
  [ruby-core:80987] [Bug #13540]

[usa (Usaku NAKAMURA)]

• Backport changed from 2.2: UNKNOWN, 2.3: UNKNOWN, 2.4: UNKNOWN to 2.2: DONTNEED, 2.3: DONTNEED, 2.4: REQUIRED

[nagachika (Tomoyuki Chikanaga)]

• Backport changed from 2.2: DONTNEED, 2.3: DONTNEED, 2.4: REQUIRED to 2.2: DONTNEED, 2.3: DONTNEED, 2.4: DONE

ruby_2_4 r59513 merged revision(s) 58561.