1901447 - Crash in [@ selectors::parser::collect_selector_hashes<T>]

Status: NEW

(Core :: CSS Parsing and Computation, defect, P3)

Description

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

Crash report: https://crash-stats.mozilla.org/report/index/d77c4c96-d132-41e0-9f69-652910240607

Reason: EXCEPTION_ACCESS_VIOLATION_READ

Top 10 frames of crashing thread:

0  xul.dll  selectors::parser::collect_selector_hashes<style::gecko::selector_parser::SelectorImpl, selectors::parser::AncestorIter<style::gecko::selector_parser::SelectorImpl> >  servo/components/selectors/parser.rs:668
1  xul.dll  selectors::parser::collect_ancestor_hashes  servo/components/selectors/parser.rs:683
1  xul.dll  selectors::parser::AncestorHashes::new  servo/components/selectors/parser.rs:693
1  xul.dll  style::stylist::CascadeData::add_rule_list<style::gecko::data::GeckoStyleSheet>  servo/components/style/stylist.rs:3118
2  xul.dll  style::stylist::CascadeData::add_stylesheet<style::gecko::data::GeckoStyleSheet>  servo/components/style/stylist.rs:3539
3  xul.dll  style::stylist::impl$43::rebuild::closure$0  servo/components/style/stylist.rs:2665
3  xul.dll  style::stylesheet_set::SheetCollectionFlusher<style::gecko::data::GeckoStyleSheet>::each  servo/components/style/stylesheet_set.rs:242
3  xul.dll  style::stylist::CascadeData::rebuild<style::gecko::data::GeckoStyleSheet>  servo/components/style/stylist.rs:2664
4  xul.dll  style::stylist::DocumentCascadeData::rebuild  servo/components/style/stylist.rs:465
4  xul.dll  style::stylist::Stylist::flush  servo/components/style/stylist.rs:877

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: Content
• Is startup crash: No
• Has user comments: No
• Is null crash: Yes - 1 out of 6 crashes happened on null or near null memory address

Comment 1

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

The Bugbug bot thinks this bug should belong to the 'Core::CSS Parsing and Computation' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[Emilio Cobos Álvarez [:emilio]]

The few crashes I looked at don't seem particularly actionable...