Bug #14407: defined? still returning true for top-level constant when referenced with scope

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: 2.5.0
• Backport: 2.3: DONTNEED, 2.4: DONTNEED, 2.5: DONE

[grzuy (Gonzalo Rodriguez)]

class A
end

class B
end

if defined?(A::B)
  puts "defined"

  puts A::B
else
  puts "not defined"
end

When running this script with ruby 2.5.0 i get:

defined
Traceback (most recent call last):
test.rb:10:in `<main>': uninitialized constant A::B (NameError)
Did you mean?  B

while my expectation was that after the top-level constant lookup was removed from ruby 2.5, defined? would return false and i would actually get

not defined

as output

[grzuy (Gonzalo Rodriguez)]

Related to https://bugs.ruby-lang.org/issues/11547

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed

Applied in changeset trunk|r62071.

---

defined? returns nil for toplevel constant lookup

• variable.c (rb_const_defined_0): toplevel constant lookup has
  been removed, should return nil too.
  [ruby-core:85142] [Bug #14407] [Fix GH-1800]

From: Gonzalo [e-mail]

[nobu (Nobuyoshi Nakada)]

• Backport changed from 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN to 2.3: DONTNEED, 2.4: DONTNEED, 2.5: REQUIRED

[naruse (Yui NARUSE)]

• Backport changed from 2.3: DONTNEED, 2.4: DONTNEED, 2.5: REQUIRED to 2.3: DONTNEED, 2.4: DONTNEED, 2.5: DONE

ruby_2_5 r62568 merged revision(s) 62071.

[Eregon (Benoit Daloze)]

• Related to Feature #11547: remove top-level constant lookup added