thread 'main' panicked at 'd was called', $DIR/panic-short-backtrace-windows-x86_64.rs:48:5
stack backtrace:
   0: std::panicking::begin_panic
   1: d
   2: c
   3: b
   4: a
   5: some Rust fn
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.