1893909 - Crash in [@ core::option::unwrap_failed]

Status: NEW

(Core :: CSS Parsing and Computation, defect)

Description

[BugBot [:suhaib / :marco/ :calixte]]

Crash report: https://crash-stats.mozilla.org/report/index/5eaf120b-f611-4508-8d1c-58d720240411

MOZ_CRASH Reason: called `Option::unwrap()` on a `None` value

Top 10 frames of crashing thread:

0  xul.dll  MOZ_Crash  mfbt/Assertions.h:317
0  xul.dll  RustMozCrash  mozglue/static/rust/wrappers.cpp:17
1  xul.dll  mozglue_static::panic_hook  mozglue/static/rust/lib.rs:98
2  xul.dll  core::ops::function::Fn::call<void   /rustc/7cf61ebde7b22796c69757901dd346d0fe70bd97/library/core/src/ops/function.rs:250
3  xul.dll  alloc::boxed::impl$49::call  library/alloc/src/boxed.rs:2029
3  xul.dll  std::panicking::rust_panic_with_hook  library/std/src/panicking.rs:785
4  xul.dll  std::panicking::begin_panic_handler::closure$0  library/std/src/panicking.rs:651
5  xul.dll  std::sys_common::backtrace::__rust_end_short_backtrace<std::panicking::begin_panic_handler::closure_env$0, never$>  library/std/src/sys_common/backtrace.rs:171
6  xul.dll  std::panicking::begin_panic_handler  library/std/src/panicking.rs:647
7  xul.dll  core::panicking::panic_fmt  library/core/src/panicking.rs:72

By querying Nightly crashes reported within the last 2 months, here are some insights about the signature:

• First crash report: 2024-04-05
• Process type: Multiple distinct types
• Is startup crash: No
• Has user comments: No
• Is null crash: Yes - 5 out of 14 crashes happened on null or near null memory address

Comment 1

[Andrew McCreight [:mccr8]]

This signature is pretty useless, but the volume is so low I'm not sure it is worth adding this function to the prefix list.