R devel - Jun 2021 - Remove env var with .Renviron?

I have two .Renviron files:  one in my home directory, one in the 
current directory.  From my reading of ?Startup, I thought the local one 
would override the home dir one, and if I set a value, it does. 
However, if the local .Renviron contains

RGL_DEBUGGING
while the home one contains

RGL_DEBUGGING=true

I see that the env var is set to "true" when I start R.  I need to set
the local one to

RGL_DEBUGGING=""

to set a zero-length value. Is this expected?

Duncan Murdoch

On 05/06/2021 4:05 p.m., Duncan Murdoch wrote:
> I have two .Renviron files:  one in my home directory, one in the
> current directory.  From my reading of ?Startup, I thought the local one
> would override the home dir one, and if I set a value, it does.
> However, if the local .Renviron contains
> 
> RGL_DEBUGGING> 
> while the home one contains
> 
> RGL_DEBUGGING=true
> 
> I see that the env var is set to "true" when I start R.  I need
to set
> the local one to
> 
> RGL_DEBUGGING=""
> 
> to set a zero-length value. Is this expected?
An update:  this looks like an RStudio bug; I'm not seeing the same 
weird behaviour in command line R.  Sorry for the noise!

Duncan Murdoch