`MIRI_LOG` environment variable. For example:
```sh
-MIRI_LOG=info ./miri run tests/run-pass/vecs.rs
+MIRI_LOG=info ./miri run tests/run-pass/vec.rs
```
Setting `MIRI_LOG` like this will configure logging for Miri itself as well as
stacked borrows implementation:
```sh
-MIRI_LOG=rustc_mir::interpret=info,miri::stacked_borrows ./miri run tests/run-pass/vecs.rs
+MIRI_LOG=rustc_mir::interpret=info,miri::stacked_borrows ./miri run tests/run-pass/vec.rs
```
In addition, you can set `MIRI_BACKTRACE=1` to get a backtrace of where an