1. Build with Clang in Debug mode:
```
CXX=clang++ CC=clang cmake .. -GNinja -DCMAKE_BUILD_TYPE=Debug
ninja check
```
2. Verify that the compiler has not emitted a `thread-safety` warning.
3. Run the node: `./src/bitcoind -regtest`
4. Verify that text similar to `"Assertion failed: lock ... not held ..."` is not printed on `stderr`.