An exhaustive list of what `miri` does not support is not available, as this could be
an unbounded set with FFI and more. However `miri` will explicitly tell you when it finds
-something unsupported with an error:
+something unsupported with an error, containing a message such as:
```
error: unsupported operation: can't call foreign function: mach_timebase_info
- --> /home/r/.rustup/toolchains/miri/lib/rustlib/src/rust/src/libstd/sys/unix/time.rs:239:13
- |
-239 | mach_timebase_info(&mut info);
- | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't call foreign function: mach_timebase_info
- |
- = help: this is likely not a bug in the program; it indicates that the program performed an operation that the interpreter does not support
- = note: inside call to `std::sys::unix::time::inner::info` at /home/r/.rustup/toolchains/miri/lib/rustlib/src/rust/src/libstd/sys/unix/time.rs:156:24
- = note: inside call to `std::sys::unix::time::inner::Instant::checked_sub_instant` at /home/r/.rustup/toolchains/miri/lib/rustlib/src/rust/src/libstd/time.rs:263:9
-note: inside call to `std::time::Instant::duration_since` at tests/run-pass/time.rs:25:20
- --> tests/run-pass/time.rs:25:20
- |
-25 | let diff = now2.duration_since(now1);
- | ^^^^^^^^^^^^^^^^^^^^^^^^^
- = note: inside call to `main` at /home/r/.rustup/toolchains/miri/lib/rustlib/src/rust/src/libstd/rt.rs:67:34
+ ...
+ = help: this is likely not a bug in the program; it indicates that the program \
+ performed an operation that the interpreter does not support
```
-If you do not see an error like this, you are able to keep using `miri`!
-
### Running Miri on CI
To run Miri on CI, make sure that you handle the case where the latest nightly