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feynon/cargo_run_error.md

Created October 17, 2025 11:55
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  1. feynon created this gist Oct 17, 2025.
    67 changes: 67 additions & 0 deletions cargo_run_error.md
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    # Cargo Run Error

    ## Command
    ```bash
    cargo run run memgpt.modelfile
    ```

    ## Error Output

    ```
    warning: hiding a lifetime that's elided elsewhere is confusing
    --> src/core/modelfile.rs:252:22
    |
    252 | fn parse_file(input: &str) -> IResult<&str, Vec<(&str, Output)>> {
    | ^^^^ ---- ---- ------ the same lifetime is hidden here
    | | | |
    | | | the same lifetime is elided here
    | | the same lifetime is elided here
    | the lifetime is elided here
    |
    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
    help: use `'_` for type paths
    |
    252 | fn parse_file(input: &str) -> IResult<&str, Vec<(&str, Output<'_>)>> {
    | ++++
    warning: hiding a lifetime that's elided elsewhere is confusing
    --> src/core/modelfile.rs:256:25
    |
    256 | fn parse_command(input: &str) -> IResult<&str, (&str, Output)> {
    | ^^^^ ---- ---- ------ the same lifetime is hidden here
    | | | |
    | | | the same lifetime is elided here
    | | the same lifetime is elided here
    | the lifetime is elided here
    |
    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
    help: use `'_` for type paths
    |
    256 | fn parse_command(input: &str) -> IResult<&str, (&str, Output<'_>)> {
    | ++++
    warning: `tiles` (lib) generated 2 warnings
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.04s
    Running `target/debug/tiles run memgpt.modelfile`
    thread 'main' panicked at src/runner/mlx.rs:44:10:
    mlx runner failed: Os { code: 2, kind: NotFound, message: "No such file or directory" }
    note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
    ```

    ## Analysis

    The error shows:

    1. **Warnings**: Two lifetime syntax warnings in `src/core/modelfile.rs` at lines 252 and 256
    2. **Main Error**: A panic in `src/runner/mlx.rs` at line 44 with error code 2 (No such file or directory)

    The main issue appears to be that the MLX runner is trying to access a file or directory that doesn't exist. This could be related to missing MLX dependencies or configuration files.

    ## Suggested Next Steps

    1. Check if MLX is properly installed
    2. Verify the `memgpt.modelfile` exists and is accessible
    3. Run with `RUST_BACKTRACE=1` to get more detailed stack trace information
    4. Fix the lifetime warnings in the modelfile parser