buck2 completion zsh crashes when built in debug mode from source

[lf-]

Conclusion from this: there needs to be a CI check that runs buck2 completion zsh in debug mode, apparently.

Steps to reproduce:

$ cargo run --bin buck2 -- completion zsh
   Compiling buck2_bxl v0.1.0 (/Users/jade/co/buck2/app/buck2_bxl)
   Compiling buck2 v0.1.0 (/Users/jade/co/buck2/app/buck2)
    Finished `dev` profile [optimized + debuginfo] target(s) in 7.17s
     Running `target/debug/buck2 completion zsh`
#compdef buck2 buck
# Copyright (c) Meta Platforms, Inc. and affiliates.
#
# This source code is licensed under both the MIT license found in the
# LICENSE-MIT file in the root directory of this source tree and the Apache
# License, Version 2.0 found in the LICENSE-APACHE file in the root directory
# of this source tree.

# @generated by `target/debug/buck2 completion zsh`

# clap_complete generated content BEGINS

thread 'buck2-main' panicked at /Users/jade/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/clap_builder-4.5.37/src/builder/debug_asserts.rs:86:13:
Command chrome-trace: Argument names must be unique, but 'path' is in use by more than one argument or group
stack backtrace:
   0: __rustc::rust_begin_unwind
             at /rustc/920d95eaf23d7eb6b415d09868e4f793024fa604/library/std/src/panicking.rs:697:5
   1: core::panicking::panic_fmt
             at /rustc/920d95eaf23d7eb6b415d09868e4f793024fa604/library/core/src/panicking.rs:75:14
   2: clap_builder::builder::debug_asserts::assert_app
             at /Users/jade/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/clap_builder-4.5.37/src/builder/debug_asserts.rs:86:13
   3: clap_builder::builder::command::Command::_build_self
             at /Users/jade/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/clap_builder-4.5.37/src/builder/command.rs:4404:13
   4: clap_builder::builder::command::Command::_build_recursive
             at /Users/jade/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/clap_builder-4.5.37/src/builder/command.rs:4307:9
   5: clap_builder::builder::command::Command::_build_recursive
             at /Users/jade/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/clap_builder-4.5.37/src/builder/command.rs:4309:13
   6: clap_builder::builder::command::Command::_build_recursive
             at /Users/jade/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/clap_builder-4.5.37/src/builder/command.rs:4309:13
   7: clap_builder::builder::command::Command::build
             at /Users/jade/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/clap_builder-4.5.37/src/builder/command.rs:4302:9
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
zsh: abort      cargo run --bin buck2 -- completion zsh

This is 6bb219332a023ed71ee6ee8e46a896ea0ba709a2