gnosis / dex-services / 4851

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travis-pro

Print default backtrace in additon to error log on panic (#1333)

The log message does not include the backtrace (only the last location)
but it is useful to see a full backtrace.

This is probably not optimal because kibana might jumble the backtrace if it doesn't come from a logger but still better than no backtrace at all.

### Test Plan
`env RUST_BACKTRACE=1 cargo test -p core panic_is_printed -- --ignored --nocapture`

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