Bug #16406
Updated by alanwu (Alan Wu) over 4 years ago
Consider:
```ruby
plus = proc { |a, b| a + b }
mult_two = ->(x) { x * 2 }
composed = mult_two << plus
p [composed. lambda?, composed.call([1, 2])]
```
I think this ought to print `[false, 6]` instead of `[true, 6]`, as the call `composed.call([1, 2])` is clearly not using lambda semantics.
Since `composed = f << g` calls `g` first, I think it makes sense to report `#lambda?` base based on whether `g` has lambda semantics.
I have a pull request at https://github.com/ruby/ruby/pull/2729 to make this change.