What happened?

Running Fallow on microsoft/TypeScript (https://github.com/microsoft/Typescript) aborts with a Rust stack overflow in dead-code and health.

thread '<unknown>' has overflowed its stack
fatal runtime error: stack overflow, aborting

dupes completes, so this appears isolated to the dead-code/health path.

Increasing the Rust stack makes the same commands complete successfully:

RUST_MIN_STACK=16777216 fallow --only dead-code --performance --summary

TOTAL: 2714.3ms
Dead Code: 2.76s

health also completes with the same workaround:

TOTAL: 3122.2ms
Health: 3.12s

Reproduction

git clone --depth 1 https://github.com/microsoft/TypeScript.git
cd TypeScript
fallow --only dead-code --performance --summary

Isolation:

fallow --only dead-code  -> stack overflow
fallow --only health     -> stack overflow
fallow --only dupes      -> completes (~45.8s)

Expected behavior

Fallow should not abort with a stack overflow. It should complete or report a normal diagnostic/error.

Fallow version

2.58.0

Operating system

macOS

Configuration

No Fallow config.

Note: dependencies were not installed; Fallow warned that `node_modules` was missing. The crash still seems useful because increasing `RUST_MIN_STACK` makes the same source tree complete.