readline: output of completions when column is undefined
Per: https://github.com/joyent/node/pull/9001
@ackalker
originally reported the issue and @TooTallNate
reviewed. Unfortunately
it appears to have stalled. There were a number of issues in the PR that were never
resolved. That said, the issue is still present in master. To reproduce:
bash-3.2$ ./iojs
> process.stdout.columns = undefined;
undefined
> process.std<TAB>
>
(note the blank line after pressing the TAB)