OSS-Fuzz issue 553133836 - issue with env fuzzer

OSS-Fuzz has found a bug in this project. Please see https://oss-fuzz.com/testcase?key=6571977386295296 for details and reproducers. This issue is mirrored from https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=553133836 and will auto-close if the status changes there. If you have trouble accessing this report, please file an issue at https://github.com/google/oss-fuzz/issues/new.