Commits on Sep 28, 2023

1. fix: flaky tests …

   Fix flaky tests that use `std::env::set_var`.
   
   `std::env::set_var` is not safe to be used in parallel.
   
   Reproducer:
   ``` bash
   for _ in {0..100}; do
     cargo t current_dir || exit 1
   done
   ```
   Will fail very fast.
   
   Doesn't fail:
   ```bash
   for _ in {0..100}; do
     cargo t current_dir_prefers_pwd_env_var || exit 1
     cargo t current_dir_uses_dereferenced_path_when_pwd_env_var_not_set || exit 1
   done
   ```
   
   Reference: rust-lang/rust#27970

   

   a-kenji committed Sep 28, 2023
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