Unreachable error with git repository (chmod event)

[Kerollmops]

Trying some events with git actions, I found some strange behaviour.

I am on OSX Sierra beta 10.12.2 (16C41b)

To reproduce this:

$> # listen to this directory
$> RUST_BACKTRACE=1 ./target/release/examples/monitor_debounced /tmp/hello
$>
$> mkdir /tmp/hello
$> cd /tmp/hello
$> touch hello
$> git init

$> RUST_BACKTRACE=1 ./target/release/examples/monitor_debounced /tmp/hello
watching /tmp/hello
Create("/private/tmp/hello/hello")
Some(CREATE) # that's my println debug at line 117
thread '<unnamed>' panicked at 'internal error: entered unreachable code', src/debounce/mod.rs:118
stack backtrace:
   1:        0x1003baada - std::sys::imp::backtrace::tracing::imp::write::he3d1bfbdbf113480
   2:        0x1003bde6f - std::panicking::default_hook::{{closure}}::h575f1b40d2e88f07
   3:        0x1003bcb5f - std::panicking::default_hook::h3d5dccce8125d0cf
   4:        0x1003bd196 - std::panicking::rust_panic_with_hook::h00b81bb3dcbd51f2
   5:        0x10034bb63 - std::panicking::begin_panic::h70ee11343cda1bc2
   6:        0x1003a94d8 - notify::debounce::Debounce::check_partial_rename::hcbf233e36f356a5c
   7:        0x1003a9e62 - notify::debounce::Debounce::event::h1601b8a062e67e75
   8:        0x1003a8172 - notify::debounce::EventTx::send::h9136acde8e818b2e
   9:        0x1003a33d1 - notify::fsevent::send_pending_rename_event::h8813d6188d6441e8
  10:        0x1003a5169 - notify::fsevent::callback::h843bd243c277573c
  11:     0x7fffa703db02 - implementation_callback_rpc
  12:     0x7fffa703b70d - _Xcallback_rpc
  13:     0x7fffa703b7cb - FSEventsD2F_server
  14:     0x7fffa7040fec - FSEventsClientProcessMessageCallback
  15:     0x7fffa5e517dc - __CFMachPortPerform
  16:     0x7fffa5e516c8 - __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__
  17:     0x7fffa5e51640 - __CFRunLoopDoSource1
  18:     0x7fffa5e49524 - __CFRunLoopRun
  19:     0x7fffa5e48973 - CFRunLoopRunSpecific
  20:     0x7fffa5e884f0 - CFRunLoopRun
  21:        0x1003af6c8 - notify::fsevent::FsEventWatcher::run::{{closure}}::hf9485ba872fe490f
  22:        0x1003a1cba - <std::panic::AssertUnwindSafe<F> as core::ops::FnOnce<()>>::call_once::h0986629d799f6b84
  23:        0x10034c4c3 - std::panicking::try::do_call::h075cdc0f1c38c144
  24:        0x1003be42a - __rust_maybe_catch_panic
  25:        0x10034c0f2 - std::panicking::try::h83b082fadfa7802d
  26:        0x10034a16e - std::panic::catch_unwind::h4efcd890cc4b3a3b
  27:        0x1003aeea2 - std::thread::Builder::spawn::{{closure}}::he27652165ddf436f
  28:        0x10037c783 - <F as alloc::boxed::FnBox<A>>::call_box::h95de920981a48031
  29:        0x1003bc5a4 - std::sys::imp::thread::Thread::new::thread_start::h990fb082eb5abe34
  30:     0x7fffbb7c6aaa - _pthread_body
  31:     0x7fffbb7c69f6 - _pthread_start

[RHavar]

Another (possibly easier) way to trigger this is in macos is to watch ~/Desktop and then take a screenshot.

I get the same thing that causes the error:
Some(CREATE) # that's my println debug at line 117