thisisnic commented on PR #47985:
URL: https://github.com/apache/arrow/pull/47985#issuecomment-3497376983

   > Did you manage to get a CI job running with this failing in it? I too am 
surprised we hadn't caught it.
   
   Yeah, in my most recent commit I removed a LOT of crap I added on the 
journey to this smaller PR, but I ended up on this path as I added a condition 
in `configure.win` (and `configure`) to error out if the running of `codegen.R` 
failed and it instantly failed.  I thought it was my changes or other recent 
ones which had caused this, before taking the loooooong path to figure out that 
it was segfaulting the whole time but an external process called from 
`configure.win` segfaulting doesn't cause the script to fail unless you 
explicitly tell it to (surprising!) and it had been doing it the whole time.
   
   Biggest clue was looking back to the oldest log I could find which was 
before all this base pipe stuff and it was segfaulting there but not erroring 
on CI!  And in one of my commit above, I revert all of my changes except for 
the "error if the `configure.R` step fails" one, and it still fails on CI.


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