Bug #11107: Syntax error is raised by "p ->() do a(1) do end end", but not by "p ->() do a 1 do end end"

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 2.3.0dev (2015-04-26 trunk 50395) [x86_64-darwin14]
• Backport: 2.0.0: REQUIRED, 2.1: DONE, 2.2: DONE

[wanabe (_ wanabe)]

As below, lambda literal with do..end block can raise syntax error.

$ ./ruby -ve 'p ->() do a(1) do end end'
ruby 2.3.0dev (2015-04-26 trunk 50395) [x86_64-darwin14]
-e:1: syntax error, unexpected keyword_do_block, expecting keyword_end
p ->() do a(1) do end end
                 ^

The error is not raised when I use {...} block or omit parentheses from method call in lambda.

NG cases:

p ->() do a(1) do end end
p ->() do a() do end end
p 1, ->() do a(1) do end end

OK cases:

p ->() do a 1 do end end
p ->() do a do end end
p ->() { a(1) do end }
p ->() do a(1) {} end
p ->() { a(1) { } }

Confirmed versions (same results):

• ruby 1.9.3p551 (2014-11-13 revision 48407) [x86_64-darwin14.3.0]
• ruby 2.0.0p598 (2014-11-13) [i386-mingw32]
• ruby 2.1.5p273 (2014-11-13 revision 48405) [i386-mingw32]
• ruby 2.2.2p95 (2015-04-13 revision 50295) [x86_64-darwin14]
• ruby 2.3.0dev (2015-04-26 trunk 50395) [x86_64-darwin14]

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed

Applied in changeset r50402.

---

parse.y: push cmdarg_stack

• parse.y (lambda): push and reset cmdarg_stack in lambda body.
  [ruby-core:69017] [Bug #11107]

[nobu (Nobuyoshi Nakada)]

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

[usa (Usaku NAKAMURA)]

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

ruby_2_1 r50468 merged revision(s) 50402.

[nagachika (Tomoyuki Chikanaga)]

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

Backported into ruby_2_2 branch at r50487.

[nobu (Nobuyoshi Nakada)]

• Related to Bug #11380: Parser regression in 2.3? added