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fix a deadlock in cargo pgrx install during get_git_hash() #1935

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Commits on Nov 2, 2024

  1. fix a deadlock in cargo pgrx install during get_git_hash()

    I can't quite explain why, but this function was deadlocking with this
    backtrace:
    
    ```
    * thread #1, name = 'cargo-pgrx', stop reason = signal SIGSTOP
      * frame #0: 0x00007fbe1eeb288d libc.so.6`syscall at syscall.S:38
        frame #1: 0x000055aee526c5d3 cargo-pgrx`std::sys::sync::mutex::futex::Mutex::lock_contended::h6389e2305b0b005c [inlined] std::sys::pal::unix::futex::futex_wait::h30abf43e2d55aa33 at futex.rs:67:21
        frame #2: 0x000055aee526c590 cargo-pgrx`std::sys::sync::mutex::futex::Mutex::lock_contended::h6389e2305b0b005c at futex.rs:57:13
        frame #3: 0x000055aee4157835 cargo-pgrx`std::sync::mutex::Mutex$LT$T$GT$::lock::h4d2bb65800cc6fd3 at futex.rs:29:13
        frame pgcentralfoundation#4: 0x000055aee41577ed cargo-pgrx`std::sync::mutex::Mutex$LT$T$GT$::lock::h4d2bb65800cc6fd3(self=0x000055aee6926c20) at mutex.rs:317:24
        frame pgcentralfoundation#5: 0x000055aee406c779 cargo-pgrx`cargo_pgrx::command::install::get_git_hash::ha84d504db9d1bba8(manifest_path=0x00007ffdc43b83b0) at install.rs:507:9
        frame pgcentralfoundation#6: 0x000055aee406d6e9 cargo-pgrx`cargo_pgrx::command::install::filter_contents::h8c710847129ba6be(manifest_path=0x00007ffdc43b8d10, input=String @ 0x00007ffdc43b8940) at install.rs:541:46
    ```
    eeeebbbbrrrr committed Nov 2, 2024
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