# \[WIP\] markdown: Add a test to reproduce the parser's panic \(\#29479\) · gitcafe/zed

[View on GitCafe](https://git.cafe/gitcafe/zed/commit/bb7a5b13df57209a36934c34f786902b30a437f8)

Repository: [gitcafe/zed](https://git.cafe/gitcafe/zed)

Visibility: public

Requested revision: bb7a5b13df57209a36934c34f786902b30a437f8

Requested commit: bb7a5b13df57209a36934c34f786902b30a437f8

Commit: bb7a5b13df57209a36934c34f786902b30a437f8

Tree: 4b04cca3d2aff0b4951a4964dcfed53db4c2767d

Author: Oleksiy Syvokon

Committer: GitHub

## Message

````
[WIP] markdown: Add a test to reproduce the parser's panic (#29479)

Backtrace of the panic in the Agent pane:
```
Thread "<unnamed>" panicked with "called `Option::unwrap()` on a `None` value" at crates/markdown/src/parser.rs:264:55
https://github.com/zed-industries/zed/blob/3fdbc3090d2cc5c2e24014009cccbe5e7c55d217/src/crates/markdown/src/parser.rs#L264 (may not be uploaded, line may be incorrect if files modified)
   0: zed::reliability::init_panic_hook::{{closure}}
             at /home/silver/develop/zed/crates/zed/src/reliability.rs:56:29
   1: <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call
             at /rustc/05f9846f893b09a1be1fc8560e33fc3c815cfecb/library/alloc/src/boxed.rs:1990:9
      std::panicking::rust_panic_with_hook
             at /rustc/05f9846f893b09a1be1fc8560e33fc3c815cfecb/library/std/src/panicking.rs:839:13
   2: std::panicking::begin_panic_handler::{{closure}}
             at /rustc/05f9846f893b09a1be1fc8560e33fc3c815cfecb/library/std/src/panicking.rs:697:13
   3: std::sys::backtrace::__rust_end_short_backtrace
             at /rustc/05f9846f893b09a1be1fc8560e33fc3c815cfecb/library/std/src/sys/backtrace.rs:168:18
   4: rust_begin_unwind
             at /rustc/05f9846f893b09a1be1fc8560e33fc3c815cfecb/library/std/src/panicking.rs:695:5
   5: core::panicking::panic_fmt
             at /rustc/05f9846f893b09a1be1fc8560e33fc3c815cfecb/library/core/src/panicking.rs:75:14
   6: core::panicking::panic
             at /rustc/05f9846f893b09a1be1fc8560e33fc3c815cfecb/library/core/src/panicking.rs:145:5
   7: core::option::unwrap_failed
             at /rustc/05f9846f893b09a1be1fc8560e33fc3c815cfecb/library/core/src/option.rs:2015:5
   8: core::option::Option<T>::unwrap
             at /home/silver/.rustup/toolchains/1.86-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/option.rs:978:21
      markdown::parser::parse_markdown
             at /home/silver/develop/zed/crates/markdown/src/parser.rs:264:37
   9: markdown::Markdown::parse::{{closure}}
             at /home/silver/develop/zed/crates/markdown/src/markdown.rs:282:51
  10: <core::pin::Pin<P> as core::future::future::Future>::poll
             at /home/silver/.rustup/toolchains/1.86-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/future/future.rs:124:9
  11: async_task::raw::RawTask<F,T,S,M>::run
             at /home/silver/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/async-task-4.7.1/src/raw.rs:557:17
  12: async_task::runnable::Runnable<M>::run
             at /home/silver/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/async-task-4.7.1/src/runnable.rs:781:18
  13: gpui::platform::linux::dispatcher::LinuxDispatcher::new::{{closure}}::{{closure}}
             at /home/silver/develop/zed/crates/gpui/src/platform/linux/dispatcher.rs:44:25
  14: std::sys::backtrace::__rust_begin_short_backtrace
             at /home/silver/.rustup/toolchains/1.86-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/sys/backtrace.rs:152:18
  15: std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}
             at /home/silver/.rustup/toolchains/1.86-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/thread/mod.rs:559:17
  16: <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
             at /home/silver/.rustup/toolchains/1.86-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/panic/unwind_safe.rs:272:9
  17: std::panicking::try::do_call
             at /home/silver/.rustup/toolchains/1.86-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/panicking.rs:587:40
  18: __rust_try
  19: std::panicking::try
             at /home/silver/.rustup/toolchains/1.86-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/panicking.rs:550:19
      std::panic::catch_unwind
             at /home/silver/.rustup/toolchains/1.86-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/panic.rs:358:14
      std::thread::Builder::spawn_unchecked_::{{closure}}
             at /home/silver/.rustup/toolchains/1.86-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/thread/mod.rs:557:30
  20: core::ops::function::FnOnce::call_once{{vtable.shim}}
             at /home/silver/.rustup/toolchains/1.86-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ops/function.rs:250:5
  21: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /rustc/05f9846f893b09a1be1fc8560e33fc3c815cfecb/library/alloc/src/boxed.rs:1976:9
      <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /rustc/05f9846f893b09a1be1fc8560e33fc3c815cfecb/library/alloc/src/boxed.rs:1976:9
      std::sys::pal::unix::thread::Thread::new::thread_start
             at /rustc/05f9846f893b09a1be1fc8560e33fc3c815cfecb/library/std/src/sys/pal/unix/thread.rs:106:17
  22: start_thread
             at ./nptl/pthread_create.c:447:8
  23: clone3
             at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78:0

Segmentation fault
```


Release Notes:

- N/A *or* Added/Fixed/Improved ...

---------

Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>
````

## Parents

- [1e47dfce79d98cdd65d734faef946e1bab840cec](https://git.cafe/gitcafe/zed/commit/1e47dfce79d98cdd65d734faef946e1bab840cec?format=markdown)

[Source at this commit](https://git.cafe/gitcafe/zed/tree/bb7a5b13df57209a36934c34f786902b30a437f8?format=markdown)