RUST_BACKTRACE=1 cargo +nightly test --lib --features=backtraces

[dzmitry-lahoda]

error[E0599]: no method named `backtrace` found for reference `&dyn std::error::Error` in the current scope
   --> /home/dz/.cargo/registry/src/github.com-1ecc6299db9ec823/cosmwasm-std-1.0.0/src/errors/std_error.rs:101:9
    |
101 |         source: ConversionOverflowError,
    |         ^^^^^^ method not found in `&dyn std::error::Error`

so how to run with this feature?