git-branchless Branchless init doesn't work with a non-standard worktree layout

Description of the bug

I believe my worktree topology is configured in a non-standard way, and it's preventing branchless init from succeeding.

Topology:

linked worktree: $HOME/workspaces/myrepo contents of .git file: gitdir: $HOME/.local/share/myrepo.git/worktrees/myrepo

bare: $HOME/.local/share/myrepo.git contents of gitdir file: $HOME/workspaces/myrepo/.git

I'm not sure how to set up a minimal repro case for this, but happy to grab any other relevant parameters as well.

Expected behavior

Init succeeds

Actual behavior

❯ git branchless init
The application panicked (crashed).
Message:  A fatal error occurred: 
   0: could not open repository: could not find repository from '/home/russ.brennan/.local/share/poppy/src/github.robot.car/cruise'; class=Repository (6); code=NotFound (-3)
   1: could not find repository from '/home/russ.brennan/.local/share/poppy/src/github.robot.car/cruise'; class=Repository (6); code=NotFound (-3)

Location:
   git-branchless-init/src/lib.rs:589

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
                                ⋮ 3 frames hidden ⋮                               
   4: git_branchless_init::command_init::h85f4c92a6835c724
      at <unknown source file>:<unknown line>
   5: git_branchless_init::command_main::hcf13cd11b485e2dd
      at <unknown source file>:<unknown line>
   6: git_branchless::commands::command_main::ha3994300ed87cdc3
      at <unknown source file>:<unknown line>
   7: git_branchless_invoke::do_main_and_drop_locals::ha19c4a129cdbabf9
      at <unknown source file>:<unknown line>
   8: git_branchless::commands::main::h2573813207db7dad
      at <unknown source file>:<unknown line>
   9: std::sys_common::backtrace::__rust_begin_short_backtrace::h21c2fd2ef03ce226
      at <unknown source file>:<unknown line>
  10: std::rt::lang_start::{{closure}}::hc09d9c6b25f3b076
      at <unknown source file>:<unknown line>
  11: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::hb69be6e0857c6cfb
      at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/core/src/ops/function.rs:283
  12: std::panicking::try::do_call::h396dfc441ee9c786
      at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panicking.rs:492
  13: std::panicking::try::h6cdda972d28b3a4f
      at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panicking.rs:456
  14: std::panic::catch_unwind::h376039ec264e8ef9
      at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panic.rs:137
  15: std::rt::lang_start_internal::{{closure}}::hc94720ca3d4cb727
      at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/rt.rs:148
  16: std::panicking::try::do_call::h2422fb95933fa2d5
      at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panicking.rs:492
  17: std::panicking::try::h488286b5ec8333ff
      at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panicking.rs:456
  18: std::panic::catch_unwind::h81636549836d2a25
      at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panic.rs:137
  19: std::rt::lang_start_internal::h6ba1bb743c1e9df9
      at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/rt.rs:148
  20: main<unknown>
      at <unknown source file>:<unknown line>
  21: __libc_start_main<unknown>
      at /build/glibc-CVJwZb/glibc-2.27/csu/../csu/libc-start.c:310
  22: _start<unknown>
      at <unknown source file>:<unknown line>

Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering.
Run with RUST_BACKTRACE=full to include source snippets.
Location: git-branchless/src/commands/mod.rs:255

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
                                ⋮ 8 frames hidden ⋮                               
   9: core::result::Result<T,E>::expect::hb55401d2b6ddac12
      at <unknown source file>:<unknown line>
  10: git_branchless::commands::main::h2573813207db7dad
      at <unknown source file>:<unknown line>
  11: std::sys_common::backtrace::__rust_begin_short_backtrace::h21c2fd2ef03ce226
      at <unknown source file>:<unknown line>
  12: std::rt::lang_start::{{closure}}::hc09d9c6b25f3b076
      at <unknown source file>:<unknown line>
  13: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::hb69be6e0857c6cfb
      at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/core/src/ops/function.rs:283
  14: std::panicking::try::do_call::h396dfc441ee9c786
      at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panicking.rs:492
  15: std::panicking::try::h6cdda972d28b3a4f
      at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panicking.rs:456
  16: std::panic::catch_unwind::h376039ec264e8ef9
      at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panic.rs:137
  17: std::rt::lang_start_internal::{{closure}}::hc94720ca3d4cb727
      at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/rt.rs:148
  18: std::panicking::try::do_call::h2422fb95933fa2d5
      at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panicking.rs:492
  19: std::panicking::try::h488286b5ec8333ff
      at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panicking.rs:456
  20: std::panic::catch_unwind::h81636549836d2a25
      at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panic.rs:137
  21: std::rt::lang_start_internal::h6ba1bb743c1e9df9
      at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/rt.rs:148
  22: main<unknown>
      at <unknown source file>:<unknown line>
  23: __libc_start_main<unknown>
      at /build/glibc-CVJwZb/glibc-2.27/csu/../csu/libc-start.c:310
  24: _start<unknown>
      at <unknown source file>:<unknown line>

Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering.
Run with RUST_BACKTRACE=full to include source snippets.

Version of `rustc`

rustc 1.65.0 (897e37553 2022-11-02)

Automated bug report

Software version

git-branchless 0.7.0-pre.1 (736f398)

Operating system

Linux 5.4.0-1098-gcp

Command-line

/home/russ.brennan/.cargo/bin/git-branchless bug-report

Environment variables

SHELL=/bin/zsh
EDITOR=vim

Git version

> git version 
git version 2.39.1

Hooks

Show 7 hooks

Hook `post-applypatch`

#!/bin/sh
## START BRANCHLESS CONFIG

# This hook has been uninstalled.
# Run `git branchless init` to reinstall.
## END BRANCHLESS CONFIG

Hook `post-checkout`

#!/bin/sh
## START BRANCHLESS CONFIG

# This hook has been uninstalled.
# Run `git branchless init` to reinstall.
## END BRANCHLESS CONFIG

Hook `post-commit`

#!/bin/sh
## START BRANCHLESS CONFIG

# This hook has been uninstalled.
# Run `git branchless init` to reinstall.
## END BRANCHLESS CONFIG

Hook `post-merge`

#!/bin/sh
## START BRANCHLESS CONFIG

# This hook has been uninstalled.
# Run `git branchless init` to reinstall.
## END BRANCHLESS CONFIG

Hook `post-rewrite`

#!/bin/sh
## START BRANCHLESS CONFIG

# This hook has been uninstalled.
# Run `git branchless init` to reinstall.
## END BRANCHLESS CONFIG

Hook `pre-auto-gc`

#!/bin/sh
## START BRANCHLESS CONFIG

# This hook has been uninstalled.
# Run `git branchless init` to reinstall.
## END BRANCHLESS CONFIG