GNU bug report logs - #64605
HandBrake 1.5.1 hangs on startup due libQt5Qml

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Package: guix;

Reported by: Distopico Vegan <distopico <at> riseup.net>

Date: Fri, 14 Jul 2023 04:54:01 UTC

Severity: normal

Done: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>

Bug is archived. No further changes may be made.

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Report forwarded to bug-guix <at> gnu.org:
bug#64605; Package guix. (Fri, 14 Jul 2023 04:54:01 GMT) Full text and rfc822 format available.
Acknowledgement sent to Distopico Vegan <distopico <at> riseup.net>:
New bug report received and forwarded. Copy sent to bug-guix <at> gnu.org. (Fri, 14 Jul 2023 04:54:01 GMT) Full text and rfc822 format available.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Distopico Vegan <distopico <at> riseup.net>
To: bug-guix <at> gnu.org
Subject: HandBrake 1.5.1 hangs on startup due libQt5Qml
Date: Thu, 13 Jul 2023 13:56:36 -0500

[Message part 1 (text/plain, inline)]
HandBrake 1.5.1 hangs on startup and `dmesg` show the following error


```
 QQmlThread[....]: segfault at 0 ip 000.... sp 0000... error 4 in libQt5Qml.so.5.15.8
```
After some research I found a similar issues on NixOS:

- https://github.com/NixOS/nixpkgs/issues/32577
- https://github.com/NixOS/nixpkgs/issues/177720

and a solution: https://github.com/NixOS/nixpkgs/pull/197010

Looks like the issue is related with QML disk cache, and after test
ruining *handbrake* with `QML_DISABLE_DISK_CACHE=1` works fine

```
QML_DISABLE_DISK_CACHE=1 ghb
```

[signature.asc (application/pgp-signature, inline)]
Information forwarded to bug-guix <at> gnu.org:
bug#64605; Package guix. (Thu, 20 Jul 2023 13:16:01 GMT) Full text and rfc822 format available.

Message #8 received at 64605 <at> debbugs.gnu.org (full text, mbox):

From: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
To: Distopico Vegan <distopico <at> riseup.net>
Cc: 64605 <at> debbugs.gnu.org
Subject: Re: bug#64605: HandBrake 1.5.1 hangs on startup due libQt5Qml
Date: Thu, 20 Jul 2023 09:15:38 -0400

Hello,

Distopico Vegan <distopico <at> riseup.net> writes:

> HandBrake 1.5.1 hangs on startup and `dmesg` show the following error
>
>
> ```
>  QQmlThread[....]: segfault at 0 ip 000.... sp 0000... error 4 in libQt5Qml.so.5.15.8
> ```
> After some research I found a similar issues on NixOS:
>
> - https://github.com/NixOS/nixpkgs/issues/32577
> - https://github.com/NixOS/nixpkgs/issues/177720
>
> and a solution: https://github.com/NixOS/nixpkgs/pull/197010
>
> Looks like the issue is related with QML disk cache, and after test
> ruining *handbrake* with `QML_DISABLE_DISK_CACHE=1` works fine
>
> ```
> QML_DISABLE_DISK_CACHE=1 ghb
> ```

This looks like an upstream Qt problem.  Have you searched if an issue
was known about it?  Their tracker is at https://bugreports.qt.io/.

-- 
Thanks,
Maxim
Information forwarded to bug-guix <at> gnu.org:
bug#64605; Package guix. (Thu, 20 Jul 2023 16:49:02 GMT) Full text and rfc822 format available.

Message #11 received at 64605 <at> debbugs.gnu.org (full text, mbox):

From: Distopico <distopico <at> riseup.net>
To: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
Cc: 64605 <at> debbugs.gnu.org
Subject: Re: bug#64605: HandBrake 1.5.1 hangs on startup due libQt5Qml
Date: Thu, 20 Jul 2023 11:43:39 -0500

[Message part 1 (text/plain, inline)]
On 2023-07-20, Maxim Cournoyer <maxim.cournoyer <at> gmail.com> wrote:

> This looks like an upstream Qt problem.  Have you searched if an issue
> was known about it?  Their tracker is at https://bugreports.qt.io/.

Checking there looks like is already reported a similar issue
https://bugreports.qt.io/browse/QTBUG-58508, I think that happens in
Guix/Nix becase QT is trying to write inside the profile path 


[signature.asc (application/pgp-signature, inline)]
Information forwarded to bug-guix <at> gnu.org:
bug#64605; Package guix. (Thu, 20 Jul 2023 19:52:02 GMT) Full text and rfc822 format available.

Message #14 received at 64605 <at> debbugs.gnu.org (full text, mbox):

From: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
To: Distopico <distopico <at> riseup.net>
Cc: 64605 <at> debbugs.gnu.org
Subject: Re: bug#64605: HandBrake 1.5.1 hangs on startup due libQt5Qml
Date: Thu, 20 Jul 2023 15:51:35 -0400

Hello,

Distopico <distopico <at> riseup.net> writes:

> On 2023-07-20, Maxim Cournoyer <maxim.cournoyer <at> gmail.com> wrote:
>
>> This looks like an upstream Qt problem.  Have you searched if an issue
>> was known about it?  Their tracker is at https://bugreports.qt.io/.
>
> Checking there looks like is already reported a similar issue
> https://bugreports.qt.io/browse/QTBUG-58508, I think that happens in
> Guix/Nix becase QT is trying to write inside the profile path 

It looks like we should apply this patch to completely disable QML disk
cache in Qt: https://github.com/NixOS/nixpkgs/pull/197010.

-- 
Thanks,
Maxim
Information forwarded to bug-guix <at> gnu.org:
bug#64605; Package guix. (Thu, 20 Jul 2023 20:27:01 GMT) Full text and rfc822 format available.

Message #17 received at 64605 <at> debbugs.gnu.org (full text, mbox):

From: Distopico <distopico <at> riseup.net>
To: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
Cc: 64605 <at> debbugs.gnu.org
Subject: Re: bug#64605: HandBrake 1.5.1 hangs on startup due libQt5Qml
Date: Thu, 20 Jul 2023 15:25:10 -0500

[Message part 1 (text/plain, inline)]
On 2023-07-20, Maxim Cournoyer <maxim.cournoyer <at> gmail.com> wrote:

> Hello,
>
> Distopico <distopico <at> riseup.net> writes:
>
>> On 2023-07-20, Maxim Cournoyer <maxim.cournoyer <at> gmail.com> wrote:
>>
>>> This looks like an upstream Qt problem.  Have you searched if an issue
>>> was known about it?  Their tracker is at https://bugreports.qt.io/.
>>
>> Checking there looks like is already reported a similar issue
>> https://bugreports.qt.io/browse/QTBUG-58508, I think that happens in
>> Guix/Nix becase QT is trying to write inside the profile path 
>
> It looks like we should apply this patch to completely disable QML disk
> cache in Qt: https://github.com/NixOS/nixpkgs/pull/197010.

yes, I was thinking on that, maybe inside [profile]/etc/profile

[signature.asc (application/pgp-signature, inline)]
Information forwarded to bug-guix <at> gnu.org:
bug#64605; Package guix. (Fri, 21 Jul 2023 01:36:01 GMT) Full text and rfc822 format available.

Message #20 received at 64605 <at> debbugs.gnu.org (full text, mbox):

From: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
To: Distopico <distopico <at> riseup.net>
Cc: 64605 <at> debbugs.gnu.org
Subject: Re: bug#64605: HandBrake 1.5.1 hangs on startup due libQt5Qml
Date: Thu, 20 Jul 2023 21:35:25 -0400

Hi,

Distopico <distopico <at> riseup.net> writes:

> On 2023-07-20, Maxim Cournoyer <maxim.cournoyer <at> gmail.com> wrote:
>
>> Hello,
>>
>> Distopico <distopico <at> riseup.net> writes:
>>
>>> On 2023-07-20, Maxim Cournoyer <maxim.cournoyer <at> gmail.com> wrote:
>>>
>>>> This looks like an upstream Qt problem.  Have you searched if an issue
>>>> was known about it?  Their tracker is at https://bugreports.qt.io/.
>>>
>>> Checking there looks like is already reported a similar issue
>>> https://bugreports.qt.io/browse/QTBUG-58508, I think that happens in
>>> Guix/Nix becase QT is trying to write inside the profile path 
>>
>> It looks like we should apply this patch to completely disable QML disk
>> cache in Qt: https://github.com/NixOS/nixpkgs/pull/197010.
>
> yes, I was thinking on that, maybe inside [profile]/etc/profile

No, the patch is more definitive than that, it disables the QML disk
caching from qtdeclarative directly.

-- 
Thanks,
Maxim
Reply sent to Maxim Cournoyer <maxim.cournoyer <at> gmail.com>:
You have taken responsibility. (Sat, 26 Aug 2023 02:28:02 GMT) Full text and rfc822 format available.
Notification sent to Distopico Vegan <distopico <at> riseup.net>:
bug acknowledged by developer. (Sat, 26 Aug 2023 02:28:02 GMT) Full text and rfc822 format available.

Message #25 received at 64605-done <at> debbugs.gnu.org (full text, mbox):

From: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
To: Distopico <distopico <at> riseup.net>
Cc: 64605-done <at> debbugs.gnu.org
Subject: Re: bug#64605: HandBrake 1.5.1 hangs on startup due libQt5Qml
Date: Fri, 25 Aug 2023 22:26:52 -0400

Hello,

Maxim Cournoyer <maxim.cournoyer <at> gmail.com> writes:

> Hi,
>
> Distopico <distopico <at> riseup.net> writes:
>
>> On 2023-07-20, Maxim Cournoyer <maxim.cournoyer <at> gmail.com> wrote:
>>
>>> Hello,
>>>
>>> Distopico <distopico <at> riseup.net> writes:
>>>
>>>> On 2023-07-20, Maxim Cournoyer <maxim.cournoyer <at> gmail.com> wrote:
>>>>
>>>>> This looks like an upstream Qt problem.  Have you searched if an issue
>>>>> was known about it?  Their tracker is at https://bugreports.qt.io/.
>>>>
>>>> Checking there looks like is already reported a similar issue
>>>> https://bugreports.qt.io/browse/QTBUG-58508, I think that happens in
>>>> Guix/Nix becase QT is trying to write inside the profile path 
>>>
>>> It looks like we should apply this patch to completely disable QML disk
>>> cache in Qt: https://github.com/NixOS/nixpkgs/pull/197010.
>>
>> yes, I was thinking on that, maybe inside [profile]/etc/profile
>
> No, the patch is more definitive than that, it disables the QML disk
> caching from qtdeclarative directly.

Installed with commit 1717c8a233b7fda3a10aabc061168c71317f883e.

Let me know if any caching problems persist.

-- 
Thanks,
Maxim
bug archived. Request was from Debbugs Internal Request <help-debbugs <at> gnu.org> to internal_control <at> debbugs.gnu.org. (Sat, 23 Sep 2023 11:24:05 GMT) Full text and rfc822 format available.
This bug report was last modified 1 year and 230 days ago.

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