Bug 907367 – net-libs/webkit-gtk:6: -O3 causes crashes on runtime with complex websites

• Status: CONFIRMED
• Product: Gentoo Linux

[Description Maciej Barć 2023-05-29 13:25:03 UTC]

Today after reboot I noticed Tangram could not load many websites. After installing Epiphany it was crashing on those websites.

There is no backtrace, only this info:
> (epiphany:7295): Adwaita-WARNING **: 15:20:19.598: Using GtkSettings:gtk-application-prefer-dark-theme with libadwaita is unsupported. Please use AdwStyleManager:color-scheme instead.
> (epiphany:7295): epiphany-WARNING **: 15:20:19.834: Cannot fetch source for filter e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 from <>: The URL can’t be shown
> (epiphany:7295): epiphany-WARNING **: 15:20:23.043: Web process crashed

The website that always crashes for me is https://fosstodon.org after it almost finishes loading.

[Comment 1 Maciej Barć 2023-05-29 13:26:58 UTC]

Created attachment 862816 [details]
emerge --info

emerge --info net-libs/webkit-gtk > net-libs.webkit-gtk.emerge.info.txt

[Comment 2 Maciej Barć 2023-05-29 13:32:19 UTC]

Also see the recording: https://dev.gentoo.org/~xgqt/zacznij_hostowac_obrazki_jak_czlowiek/2023-05-29_10-54-26.mp4

[Comment 3 Maciej Barć 2023-05-30 00:02:53 UTC]

This looks like a CFLAGS bug, I have recompiled net-libs/webkit-gtk with safer CFLAGS="-march=native -O2 -pipe" and it woks correctly.

[Comment 4 Matt Turner 2023-05-30 17:54:08 UTC]

Do you think it's -O2 vs -O3 that's responsible, or some of the other CFLAGS?

[Comment 5 Maciej Barć 2023-05-31 17:05:47 UTC]

Looks like the fault of "-O3".
Fails on runtime when compiled with "-march=native -pipe -O3".

[Comment 6 Maciej Barć 2023-12-27 23:31:30 UTC]

> Fails on runtime when compiled with "-march=native -pipe -O3".

Anybody was able to reproduce?

[Comment 7 Mart Raudsepp 2023-12-28 12:38:19 UTC]

Works fine for me, but mine's -O3 compiled with clang

[Comment 8 Sam James 2024-01-05 12:34:19 UTC]

try ubsan?