assertion failed: count_cell.get() > 0

[johansigfrids]

assertion failed: count_cell.get() > 0

URL:

https://www.computest.nl/blog/startencrypt-considered-harmful-today/

Backtrace:

frame #0  - 0x000000010bbab6ce - backtrace::backtrace::trace::hccde8df28b4db2a2
frame #1  - 0x000000010bbab651 - backtrace::capture::Backtrace::new::h42f95930bb8c5ee8
frame #2  - 0x000000010ae7c086 - _<F as alloc..boxed..FnBox<A>>::call_box::h6059122298f825d8
frame #3  - 0x000000010bb1f947 - util::panicking::initiate_panic_hook::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::h2c0e77c593c00c08
frame #4  - 0x000000010bd93844 - std::panicking::rust_panic_with_hook::h983af77c1a2e581b
frame #5  - 0x000000010a696ae4 - std::panicking::begin_panic::h0bf39f6d43ab9349
frame #6  - 0x000000010ad23262 - _<script..dom..htmllinkelement..StylesheetContext as net_traits..AsyncResponseListener>::response_complete::h315c5e417b85cb3a
frame #7  - 0x000000010ad20d65 - _<script..network_listener..ListenerRunnable<A, Listener> as script..script_thread..Runnable>::handler::hc0416bc7ab472afc
frame #8  - 0x000000010ae8795c - script::script_thread::ScriptThread::handle_msg_from_script::hd1f5e7b2423a8c64
frame #9  - 0x000000010aee3a71 - script::script_thread::ScriptThread::handle_msgs::_$u7b$$u7b$closure$u7d$$u7d$::hc67d8b381c013b79
frame #10 - 0x000000010aec973f - script::script_thread::ScriptThread::handle_msgs::h236c5be60a207bea
frame #11 - 0x000000010ae7a907 - std::panicking::try::call::h645a328f039d97c6
frame #12 - 0x000000010bdaf46b - __rust_try
frame #13 - 0x000000010bdaf405 - __rust_maybe_catch_panic
frame #14 - 0x000000010ae7bab4 - _<F as alloc..boxed..FnBox<A>>::call_box::h3db95636eb747818
frame #15 - 0x000000010bdaaee8 - std::sys::thread::Thread::new::thread_start::h9c883b6d445ece46
frame #16 - 0x00007fff994bb99c - _pthread_body
frame #17 - 0x00007fff994bb919 - _pthread_start

[alex]

Same traceback on https://www.ssllabs.com/ssltest/viewMyClient.html

[cbrewster]

Dupe of #12047.
Thanks for reporting!