1573639 - Almost total MozMill failure in debug builds on 2019-08-13: Assertion failure: sheet->ParsingMode() == aParsingMode

Status: RESOLVED FIXED

(Thunderbird :: General, defect)

Description

[Jorg K (CEST = GMT+2)]

Most tests fail with:
Assertion failure: sheet->ParsingMode() == aParsingMode, at /builds/worker/workspace/build/src/layout/style/Loader.cpp:989
TEST-UNEXPECTED-FAIL | Disconnect Error: Application unexpectedly closed
PROCESS-CRASH | content-policy | application crashed [@ mozilla::css::Loader::CreateSheet(nsIURI*, nsIContent*, nsIPrincipal*, mozilla::css::SheetParsingMode, mozilla::CORSMode, nsIReferrerInfo*, nsTSubstring<char16_t> const&, bool, mozilla::css::StyleSheetState&, RefPtr<mozilla::StyleSheet>*)]

Looks like it comes from here:
https://hg.mozilla.org/mozilla-central/rev/bec4c05b5a70d74b1b4fe7fff264b1428d06b68e#l1.129

+      MOZ_ASSERT(sheet->ParsingMode() == aParsingMode);

Comment 1

[Emilio Cobos Álvarez (:emilio)]

Will be fixed by one of the patches in bug 1571530 that haven't landed yet (https://phabricator.services.mozilla.com/D40692 in particular).

Comment 3

[Jorg K (CEST = GMT+2)]

Emilio, any news here? This has taken down our test suite in debug builds and local debug builds are also crashing unless we take out that assert.

Comment 4

[Emilio Cobos Álvarez (:emilio)]

The patches landed this morning.

Comment 5

[Jorg K (CEST = GMT+2)]

Fixed by landings in bug 1571530. However, not quite, there's a new crash now. I'll file another bug.
EDIT: Follow-up in bug 1574596.