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Bug 1422532 - gcc7 compiled firefox looks seriously broken
Summary: gcc7 compiled firefox looks seriously broken
Keywords:
Status: CLOSED RAWHIDE
Alias: None
Product: Fedora
Classification: Fedora
Component: firefox
Version: rawhide
Hardware: x86_64
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Martin Stransky
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
: 1422619 1425729 1425770 1426181 (view as bug list)
Depends On:
Blocks: F26AlphaBlocker
TreeView+ depends on / blocked
 
Reported: 2017-02-15 13:24 UTC by Mamoru TASAKA
Modified: 2017-05-22 08:57 UTC (History)
19 users (show)

Fixed In Version: firefox-51.0.1-6.fc26
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2017-02-23 19:37:22 UTC
Type: Bug
Embargoed:

Attachments (Terms of Use)
screenshot with gcc6 compiled firefox (191.16 KB, image/png)
2017-02-15 13:27 UTC, Mamoru TASAKA 		no flags Details
screenshot with gcc7 compiled firefox (139.78 KB, image/png)
2017-02-15 13:30 UTC, Mamoru TASAKA 		no flags Details
startup with 51.0.1-5.fc26 showing crash reporter (1017.35 KB, image/png)
2017-02-23 13:49 UTC, Mamoru TASAKA 		no flags Details
gdb log (82.31 KB, text/plain)
2017-02-23 15:34 UTC, Mamoru TASAKA 		no flags Details
View All

Description Mamoru TASAKA 2017-02-15 13:24:16 UTC 
Description of problem:
Looks like with gcc7 compiled firefox (firefox-51.0.1-3.fc26), browsing any web page looks seriously broken.

Just downgrading firefox only to firefox-51.0.1-2.fc26 restores "good" looking at browsing web pages.


Version-Release number of selected component (if applicable):
firefox-51.0.1-3.fc26

How reproducible:
100%

Steps to Reproduce:
1. browse any web pages with firefox-51.0.1-3.fc26
2.
3.

Actual results:
Very bad.

Expected results:
As was with firefox-51.0.1-2.fc26

Additional info:
Some screenshot will be attached.
Comment 1 Mamoru TASAKA 2017-02-15 13:27:05 UTC 
Created attachment 1250608 [details]
screenshot with gcc6 compiled firefox

https://start.fedoraproject.org/ with firefox-51.0.1-2.fc26 . Looks normal.
Comment 2 Mamoru TASAKA 2017-02-15 13:30:08 UTC 
Created attachment 1250609 [details]
screenshot with gcc7 compiled firefox

https://start.fedoraproject.org/ with firefox-51.0.1-3.fc26 . This one was compiled with gcc7.

Note that
- the right side and bottom side is black
- URL bar is not shown
- And some other things are also broken.
Comment 3 Adam Williamson 2017-02-16 01:54:17 UTC 
*** Bug 1422619 has been marked as a duplicate of this bug. ***
Comment 4 Adam Williamson 2017-02-21 16:30:39 UTC 
This renders cockpit basically unusable:

https://openqa.fedoraproject.org/tests/57165

Given how bad this is I'm gonna nominate it as an Alpha blocker, as a violation of "It must be possible to run the default web browser and a terminal application from all release-blocking desktop environments. ... The web browser must be able to download files, load extensions (if applicable), and log into FAS." - arguably, you can't reasonably do all those things with a Firefox that looks like this. openQA sure can't. :P
Comment 5 Jan Horak 2017-02-22 09:07:19 UTC 
*** Bug 1425729 has been marked as a duplicate of this bug. ***
Comment 6 Martin Stransky 2017-02-22 11:33:40 UTC 
*** Bug 1425770 has been marked as a duplicate of this bug. ***
Comment 7 Martin Stransky 2017-02-22 12:29:43 UTC 
As a workaround you can use our flatpak packages:

https://firefox-flatpak.mojefedora.cz/

or install binary from mozilla.com.
Comment 8 Kevin Fenzi 2017-02-22 14:35:04 UTC 
You can also downgrade to 
https://koji.fedoraproject.org/koji/buildinfo?buildID=836421

which currently has no dep issues or the like.
Comment 9 Kai Engert (:kaie) (inactive account) 2017-02-22 15:47:54 UTC 
Does anyone understand what's happening?
Comment 10 Martin Stransky 2017-02-22 16:38:10 UTC 
(In reply to Kai Engert (:kaie) from comment #9)
> Does anyone understand what's happening?

Build without optimization works fine so I expect it's some -O3 miscompilation/FF bug whatever. Looking into it.
Comment 11 Martin Stransky 2017-02-23 12:21:24 UTC 
New build without -O3 optimization is here:
https://koji.fedoraproject.org/koji/taskinfo?taskID=18011812
Comment 12 Mamoru TASAKA 2017-02-23 13:49:50 UTC 
Created attachment 1256931 [details]
startup with 51.0.1-5.fc26 showing crash reporter

(In reply to Martin Stransky from comment #11)
> New build without -O3 optimization is here:
> https://koji.fedoraproject.org/koji/taskinfo?taskID=18011812

Doesn't seem good.. For me this crashes on startup (i.e. this does not launch) and crash reporter appears.
Comment 13 Mamoru TASAKA 2017-02-23 13:52:41 UTC 
(In reply to Mamoru TASAKA from comment #12)
> Created attachment 1256931 [details]
> startup with 51.0.1-5.fc26 showing crash reporter

Although this picture's file name is "startup-ff-51.0.1-2.fc26.x86_64.png", this is actually with firefox-51.0.1-5.fc26.x86_64
Comment 14 Mamoru TASAKA 2017-02-23 15:34:57 UTC 
Created attachment 1256966 [details]
gdb log

gdb backtrace for firefox-51.0.1-5.fc26.x86_64
Comment 15 Yanko Kaneti 2017-02-23 16:32:47 UTC 
*** Bug 1426181 has been marked as a duplicate of this bug. ***
Comment 16 Kai Engert (:kaie) (inactive account) 2017-02-23 16:51:50 UTC 
I've also experimented with local builds, because I need to test a code change to firefox, and the -O2 build crashed for me, too.

Instead of the approach that Martin had commited, I added the following statement (which is usually used for firefox debug builds):

   MOZ_OPT_FLAGS=$(echo "$MOZ_OPT_FLAGS" | %{__sed} -e 's/-O2//')

This change disables the -O2 flag, that is obtained from this line:
  MOZ_OPT_FLAGS=$(echo "$RPM_OPT_FLAGS" | %{__sed} -e 's/-Wall//')

The local build I've produced that way works for me, without apparent visual issues.
Comment 17 Martin Stransky 2017-02-23 17:19:42 UTC 
(In reply to Mamoru TASAKA from comment #12)
> Created attachment 1256931 [details]
> startup with 51.0.1-5.fc26 showing crash reporter
> 
> (In reply to Martin Stransky from comment #11)
> > New build without -O3 optimization is here:
> > https://koji.fedoraproject.org/koji/taskinfo?taskID=18011812
> 
> Doesn't seem good.. For me this crashes on startup (i.e. this does not
> launch) and crash reporter appears.

That seems to be mozbz#1321579
Comment 18 Martin Stransky 2017-02-23 19:37:22 UTC 
New builds are available at https://koji.fedoraproject.org/koji/buildinfo?buildID=861526
Comment 19 Mamoru TASAKA 2017-02-23 20:18:21 UTC 
(In reply to Martin Stransky from comment #18)
> New builds are available at
> https://koji.fedoraproject.org/koji/buildinfo?buildID=861526

This works for me, thank you!
Comment 20 Jakub 2017-02-24 12:24:08 UTC 
hasnt there been the change in gcc in fedora that allows indefined use of functions or something..? (disables warning about them, that prevents compiling)
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