> Is this going to get tripped by a call from restore_backend_variables?
I ran 'make check-world' with EXEC_BACKEND with no problems, so I don't think so.
v3 looks good, but I'm still not sure how to test the bit mentioned above. I'm not familiar with this part of the code (SubPostmasterMain etc.), but running make check-world with EXEC_BACKEND does not seem to execute that code, as I added exit(1) to restore_backend_variables() and the tests still ran fine. Further digging shows that even though the #ifdef EXEC_BACKEND path is triggered, no --fork argument was being passed. Is there something else one needs to provide to force that --fork (see line 189 of src/backend/main/main.c) when testing?
