Hi all,
I ran into a possible problem in readline developing a library for Rake to aid in managing and launching processes.
basically, if you use (ruby) Process.spawn or other ways to launch a subprocess that don't detach and that process inherits the stdin default pipe of the parent, the terminal input gets corrupted before hitting the child process (if that child is using readline).
my reproduction for any ruby version:
```
$ irb
1.9.3-p551 :001 > Process.spawn('ruby -e "puts :first; require \'pry\'; binding.pry; puts :second"')
=> 62083
[1] pry(main)> ui first
NameError: undefined local variable or method `ui' for main:Object
[4] pry(main)> ui<main>'
NameError: undefined local variable or method `ui' for main:Object
from (pry):2:in `<main>'
[5] pry(main)> ^C
[5] pry(main)> qi
NameError: undefined local variable or method `qi' for main:Object
```
the above is me trying to type "quit" into pry and it getting corrupted.
if i slowly and deliberately type qquuiitt<esc><enter> i can sometimes get it to quit. it appears the nested readline instances may be sharing memory or similar.
i've seen this in both readline 6.3 and 7.0 on osx 10.11 and in redhat7
if i force osx or rhel7 to install and use rb-readline or editline the issue goes away.
It appears others have seen this issue as well:
i also saw a bug report on this with byebug but i can't find it.
i'm not clear if this is a feature i need to work around, or if it's a bug.
thanks!
--
eric thompson qa
(hc)erict (t)@er0ck (gh)er0ck
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