Bug #16633: TracePoint :line event issue

• Status: Rejected
• Assignee: -
• Target version: -
• ruby -v: 2.3.1-2.7.0
• Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN

[ViugiNick (Nickolay Viuginov)]

TracePoint.new(:line) do |tp|
  p [tp.lineno, tp.event]
end.enable

def bar
  yield 1
  yield 2
end
def foo
  1 + 1
  bar do |a|
    return a
  end
  1 + 1
end
def foobar
  1 + 1
  puts foo
  1 + 1
end
foobar

[5, :line]
[9, :line]
[16, :line]
[21, :line]
[17, :line]
[18, :line]
[10, :line]
[11, :line]
[6, :line]
[12, :line]
1
[19, :line]

As you can see there is no line event for line #7

[ViugiNick (Nickolay Viuginov)]

• ruby -v set to 2.3.1-2.7.0

[mame (Yusuke Endoh)]

• Status changed from Open to Rejected

In fact, Line 7 is not reachable. The return statement in the block jumps to the callsite of foo.

def bar
  yield 1
  puts "unreachable"
end

def foo
  bar do |a|
    return a # skips the rest of bar, and immediately returns to the callsite of foo
  end
  puts "unreachable too"
end

foo # the callsite of foo