Bug #10670: char-class matching same character with different encodings raises exception

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 2.2.0p0 (2014-12-25 revision 49005) [x86_64-darwin14]
• Backport: 2.0.0: DONTNEED, 2.1: DONTNEED, 2.2: DONE

[gkellogg (Gregg Kellogg)]

The following simple script illustrates the issue:

ESCAPE_PLAIN = /\A[\x5B]*\z/m.freeze

0x5B.chr(::Encoding::UTF_8) =~ ESCAPE_PLAIN
0x5B.chr =~ ESCAPE_PLAIN

\x5B is ']', run all lines above and get in `=~': empty char-class: /\A[\x5B]*\z/m (RegexpError)

Comment out either the first or second usage and the error goes away.

[nobu (Nobuyoshi Nakada)]

• Related to Bug #10382: s = '\x80'; /#{s}/ raises an exception in US-ASCII script added

[nobu (Nobuyoshi Nakada)]

• Description updated (diff)
• Backport changed from 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN to 2.0.0: DONTNEED, 2.1: DONTNEED, 2.2: REQUIRED

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed
• % Done changed from 0 to 100

Applied in changeset r49058.

---

re.c: append excape sequence as-is

• re.c (unescape_nonascii): append excape sequence as-is not
  unescaped character, to get rid of unexpected meta-character.
  [ruby-core:67193] [Bug #10670]

[naruse (Yui NARUSE)]

• Backport changed from 2.0.0: DONTNEED, 2.1: DONTNEED, 2.2: REQUIRED to 2.0.0: DONTNEED, 2.1: DONTNEED, 2.2: DONE

ruby_2_2 r49264 merged revision(s) 49058.

[nobu (Nobuyoshi Nakada)]

• Has duplicate Bug #10733: Time.httpdate raises ArgumentError when DateTime.now.httpdate is provided as input added