Backwards breaking change for setEnv

Edward Z. Yang ezyang at
Tue Aug 16 06:17:51 UTC 2016

Hello all,

I wanted to bring this bug to the attention of the CLC

I propose that we change 'setEnv k ""' to set the environment
variable to an empty string, rather than delete the environment
variable.  The existing behavior was motivated by a Windows
"quirk" that actually doesn't exist (details in ticket.)


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