Bug #14201: Regression due to over optimization of hash splat

• Status: Closed
• Assignee: nobu (Nobuyoshi Nakada)
• Target version: 2.5
• ruby -v: 2.5.0-rc1 & trunk
• Backport: 2.3: UNKNOWN, 2.4: UNKNOWN

[marcandre (Marc-Andre Lafortune)]

The following doesn't print anything nor raise anything in 2.5.0-rc1 or trunk:

$ ruby -e "{**puts('hello')}; 42"

It should be the same as in Ruby 2.0-2.4:

hello
-e:1:in `<main>': no implicit conversion of nil into Hash (TypeError)

Note: If you try to use the hash (e.g. passing as argument, storing in variable), then the correct behavior takes place. Found this bug through DeepCover's test suite.

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed

Applied in changeset trunk|r61329.

---

compile.c: side effect in splat

• compile.c (compile_array): splat which may have side effects
  should be compiled even if the result will be popped.
  [ruby-core:84340] [Bug #14201]

From: Nobuyoshi Nakada [e-mail]

[wanabe (_ wanabe)]

• Related to Bug #14459: Unexpected compile error in 2.5.0 added