Ruby

=begin
Sorry, hit the wrong button:

Fibers as superclass don't call initialize of derived class. This is probably intended, but not documented.

Description by Wolfgang Nádasi-Donner:

The following code...

class Hugo < Fiber
def initialize(&b)
puts "in 'Hugo'" # !!! never executed !!!
super(&b)
end
end

h = Hugo.new{42}
p h

...results in...

ruby19 myfiber_test.rb
#Hugo:0xb24ee0
Exit code: 0

...which I didn't expect.

=end