test: fix broken env fuzzer by initializing process

Fixes a broken fuzzer.

It looks like the fuzzer is leaking memory, but it is so slow that it is hard to tell. Once the fuzzer starts running on OSS-Fuzz again, we should get good feedback. If it has a leak, then I plan to fix it over the next couple of weeks; If anyone can spot a possible leak without running it, it would be a great help.