FRB Debugging

Note: Check your user-level remote-testing rules before running commands. Codegen and debugging may require remote execution.

When to Use

• •Generated code looks wrong
• •Code generation fails
• •Need to understand FRB internals
• •Runtime errors in generated code

Quick Diagnostics

Dump Intermediate Representations

The in-tree examples by default enable dump_all: true in flutter_rust_bridge.yaml for debugability.

Therefore, you can check rust/target/frb_dump/ for:

• •Effective configuration
• •IR (intermediate representation)
• •Generated spec and code
• •...

Debug Logs

RUST_LOG=debug flutter_rust_bridge_codegen ...

Full Troubleshooting

If above doesn't help, see:

• •website/docs/docs/guides/contributing/tip.md
• •website/docs/manual/troubleshooting.md

Related Skills

• •frb-code-generation - Which generation commands to run
• •frb-develop-feature - Development workflow