Jakob writes:
> On 07.01.2016 12:44, Brandon Allbery wrote:
>> Actually... I updated to 0.12 and at the same time switched from ghc
>> 7.6.3 to 7.10.3, and found the same thing. I had to move the "args
>> <-
>> io getArgs" directly into "main" before invocation of the "xmonad"
>> function.

> That works! Thank you. Yeah it sounds like a GHC bug for me. I also
> have xmonad 0.12 and GHC 7.10.3.

I run xmonad 0.11.1 and ghc 7.10.3 (both on Debian sid), and it works
for me (to have "as <- io getArgs" in my startupHook).