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Stack Traces

tip

This is standard Rust behavior, and is unrelated to flutter_rust_bridge. However, we do provide defaults to be "battery included".

If using the template by flutter_rust_bridge_codegen create/integrate, this is already configured by default, via the auto-generated call to flutter_rust_bridge::setup_default_user_utils().

Errors (Result)​

To pass Rust stack traces to flutter, you need to set RUST_BACKTRACE in the running application. For that simply add env::set_var("RUST_BACKTRACE", "1"); before initialising the bridge.

Note: The --dart-define will not work, you must use env::set_var, because the former does not set the "environment variable" in the common sense, but instead a special thing only visible to Dart.

Panics​

The standard Rust does not provide stack traces when catching a panic. If you want to know the stack traces, you can use approaches like https://stackoverflow.com/questions/69593235/how-to-get-panic-information-i-e-stack-trace-with-catch-unwind. The builtin utils do use it.