1995444 - Crash in [@ mozilla::net::ProtocolHandlerInfo::DynamicProtocolFlags] via gfxFontUtils::GetPrefsFontList

Status: RESOLVED DUPLICATE of bug 1963153

(Core :: Layout: Text and Fonts, defect)

Description

[BugBot [:suhaib / :marco]]

Crash report: https://crash-stats.mozilla.org/report/index/6de524ae-edbc-43bc-927c-95dfb0251019

MOZ_CRASH Reason: MOZ_DIAGNOSTIC_ASSERT(NS_IsMainThread())

Top 10 frames of crashing thread:

0  xul.dll  mozilla::net::ProtocolHandlerInfo::DynamicProtocolFlags const  netwerk/base/ProtocolHandlerInfo.cpp:40
1  xul.dll  mozilla::net::nsIOService::GetDynamicProtocolFlags  netwerk/base/nsIOService.cpp:1093
2  xul.dll  nsContentSecurityManager::CheckChannelHasProtocolSecurityFlag  dom/security/nsContentSecurityManager.cpp:1173
2  xul.dll  nsContentSecurityManager::doContentSecurityCheck  dom/security/nsContentSecurityManager.cpp:1471
3  xul.dll  nsJARChannel::Open  modules/libjar/nsJARChannel.cpp:1086
4  xul.dll  nsStringBundleBase::ParseProperties  intl/strres/nsStringBundle.cpp:476
5  xul.dll  nsStringBundle::GetStringImpl  intl/strres/nsStringBundle.cpp:592
6  xul.dll  nsStringBundleBase::GetStringFromName  intl/strres/nsStringBundle.cpp:587
7  xul.dll  nsPrefBranch::GetDefaultFromPropertiesFile  modules/libpref/Preferences.cpp:3114
7  xul.dll  nsPrefBranch::GetComplexValue  modules/libpref/Preferences.cpp:2569

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

• First crash report: 2025-10-19
• Process type: Content
• Is startup crash: No
• Has user comments: No
• Is null crash: Yes - 1 out of 2 crashes happened on null or near null memory address

Comment 1

[Andrew McCreight [:mccr8]]

This is getting called from gfxFontUtils::GetPrefsFontList for some reason.

Comment 2

[BugBot [:suhaib / :marco]]

The severity field is not set for this bug.
:lsalzman, could you have a look please?

For more information, please visit BugBot documentation.

Comment 3

[BugBot [:suhaib / :marco]]

The severity field is not set for this bug.
:boris, could you have a look please?

For more information, please visit BugBot documentation.

Comment 4

[Daniel Holbert [:dholbert]]

I think this is a duplicate of bug 1963153; it's got a similar looking backtrace.

Comment 5

[Daniel Holbert [:dholbert]]

Newest crashes here are from 146, before the fix [bug 1760013] landed.

If we see crashes from later builds than that, then we should consider reopening.