[REGRESSION] Backspace no longer works in host/rootfs make run virtiocon0

[REGRESSION] Backspace no longer works in host/rootfs make run virtiocon0

[Alyssa Ross]

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Bisected to the following range:

1e9c681 lib/nixpkgs.default.nix: update to nixos-unstable-small
f41b4ab tools: move lsvm out of subdirectory
5ad749b tools: enable clippy::ptr-as-ptr lint
a4d7aa9 tools: enable clippy::map-unwrap-or lint
3451250 host/rootfs: group VMM-backing services
99f09ab pkgs: remove dbus overlay

Most likely something in the Nixpkgs upgrade.  Needs further bisection.

To reproduce:

cd host/rootfs
nix-shell --run 'make clean && make run'
View → virtiocon0
Wait for kernel messages to finish
Try typing, see that backspace doesn't work

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Re: [REGRESSION] Backspace no longer works in host/rootfs make run virtiocon0

[Alyssa Ross]

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Alyssa Ross <hi@alyssa.is> writes:

> Bisected to the following range:
>
> 1e9c681 lib/nixpkgs.default.nix: update to nixos-unstable-small
> f41b4ab tools: move lsvm out of subdirectory
> 5ad749b tools: enable clippy::ptr-as-ptr lint
> a4d7aa9 tools: enable clippy::map-unwrap-or lint
> 3451250 host/rootfs: group VMM-backing services
> 99f09ab pkgs: remove dbus overlay
>
> Most likely something in the Nixpkgs upgrade.  Needs further bisection.

1e9c6812b7497743a8473d5eb327c26c53cfbef2 is the first bad commit
commit 1e9c6812b7497743a8473d5eb327c26c53cfbef2
Author: Alyssa Ross <hi@alyssa.is>
Date:   Sat Nov 22 13:13:28 2025 +0100

    lib/nixpkgs.default.nix: update to nixos-unstable-small
    
    Signed-off-by: Alyssa Ross <hi@alyssa.is>

 lib/nixpkgs.default.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

So needs a Nixpkgs bisect.

> To reproduce:
>
> cd host/rootfs
> nix-shell --run 'make clean && make run'
> View → virtiocon0
> Wait for kernel messages to finish
> Try typing, see that backspace doesn't work

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Re: [REGRESSION] Backspace no longer works in host/rootfs make run virtiocon0

[Alyssa Ross]

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Alyssa Ross <hi@alyssa.is> writes:

> Alyssa Ross <hi@alyssa.is> writes:
>
>> Bisected to the following range:
>>
>> 1e9c681 lib/nixpkgs.default.nix: update to nixos-unstable-small
>> f41b4ab tools: move lsvm out of subdirectory
>> 5ad749b tools: enable clippy::ptr-as-ptr lint
>> a4d7aa9 tools: enable clippy::map-unwrap-or lint
>> 3451250 host/rootfs: group VMM-backing services
>> 99f09ab pkgs: remove dbus overlay
>>
>> Most likely something in the Nixpkgs upgrade.  Needs further bisection.
>
> 1e9c6812b7497743a8473d5eb327c26c53cfbef2 is the first bad commit
> commit 1e9c6812b7497743a8473d5eb327c26c53cfbef2
> Author: Alyssa Ross <hi@alyssa.is>
> Date:   Sat Nov 22 13:13:28 2025 +0100
>
>     lib/nixpkgs.default.nix: update to nixos-unstable-small
>     
>     Signed-off-by: Alyssa Ross <hi@alyssa.is>
>
>  lib/nixpkgs.default.nix | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> So needs a Nixpkgs bisect.

# bad: [2ac8b8ee243d52c2a4b429307c23fb72cac43a5c] gitlab-runner: apply patch for file variable handling (#463714)
# good: [b549734f6b3ec54bb9a611a4185d11ee31f52ee1] codex: 0.56.0 -> 0.57.0 (#460287)
git bisect start '2ac8b8ee243d52c2a4b429307c23fb72cac43a5c' 'b549734f6b3ec54bb9a611a4185d11ee31f52ee1'
# good: [ccea08b7b36a1b1388c174d5b8398fcbb0bdb757] Merge master into staging-nixos
git bisect good ccea08b7b36a1b1388c174d5b8398fcbb0bdb757
# good: [ccea08b7b36a1b1388c174d5b8398fcbb0bdb757] Merge master into staging-nixos
git bisect good ccea08b7b36a1b1388c174d5b8398fcbb0bdb757
# bad: [6db9eed557c922da1e7dc287726e6e492ef24326] python313Packages.langchain: fix build (#461518)
git bisect bad 6db9eed557c922da1e7dc287726e6e492ef24326
# good: [1a41aa87c3f40f7493b3e4da391b2ff3af9ffb24] linux_6_17: 6.17.7 -> 6.17.8
git bisect good 1a41aa87c3f40f7493b3e4da391b2ff3af9ffb24
# bad: [14dc5ea9de0e8745374ecbdc6916e3c85b15e4e3] staging-nixos merge for 2025-11-14 (#461577)
git bisect bad 14dc5ea9de0e8745374ecbdc6916e3c85b15e4e3
# good: [c4d1151093af5d483d1900d9214a65e68bc21560] flutterPackages-source: clean (#460613)
git bisect good c4d1151093af5d483d1900d9214a65e68bc21560

Most likely looking remaining candidate is 6725ca2dabdd ("gtk3: 3.24.50 → 3.24.51").

I also found https://gitlab.com/qemu-project/qemu/-/issues/3191, which
looks like the same thing.  Doesn't look like there's a patch yet.  I'll
continue with the bisect in case it helps them to have the specific
change that caused the regression.

>> To reproduce:
>>
>> cd host/rootfs
>> nix-shell --run 'make clean && make run'
>> View → virtiocon0
>> Wait for kernel messages to finish
>> Try typing, see that backspace doesn't work

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Re: [REGRESSION] Backspace no longer works in host/rootfs make run virtiocon0

[Alyssa Ross]

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Alyssa Ross <hi@alyssa.is> writes:

> Alyssa Ross <hi@alyssa.is> writes:
>
>> Alyssa Ross <hi@alyssa.is> writes:
>>
>>> Bisected to the following range:
>>>
>>> 1e9c681 lib/nixpkgs.default.nix: update to nixos-unstable-small
>>> f41b4ab tools: move lsvm out of subdirectory
>>> 5ad749b tools: enable clippy::ptr-as-ptr lint
>>> a4d7aa9 tools: enable clippy::map-unwrap-or lint
>>> 3451250 host/rootfs: group VMM-backing services
>>> 99f09ab pkgs: remove dbus overlay
>>>
>>> Most likely something in the Nixpkgs upgrade.  Needs further bisection.
>>
>> 1e9c6812b7497743a8473d5eb327c26c53cfbef2 is the first bad commit
>> commit 1e9c6812b7497743a8473d5eb327c26c53cfbef2
>> Author: Alyssa Ross <hi@alyssa.is>
>> Date:   Sat Nov 22 13:13:28 2025 +0100
>>
>>     lib/nixpkgs.default.nix: update to nixos-unstable-small
>>     
>>     Signed-off-by: Alyssa Ross <hi@alyssa.is>
>>
>>  lib/nixpkgs.default.nix | 4 ++--
>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> So needs a Nixpkgs bisect.
>
> # bad: [2ac8b8ee243d52c2a4b429307c23fb72cac43a5c] gitlab-runner: apply patch for file variable handling (#463714)
> # good: [b549734f6b3ec54bb9a611a4185d11ee31f52ee1] codex: 0.56.0 -> 0.57.0 (#460287)
> git bisect start '2ac8b8ee243d52c2a4b429307c23fb72cac43a5c' 'b549734f6b3ec54bb9a611a4185d11ee31f52ee1'
> # good: [ccea08b7b36a1b1388c174d5b8398fcbb0bdb757] Merge master into staging-nixos
> git bisect good ccea08b7b36a1b1388c174d5b8398fcbb0bdb757
> # good: [ccea08b7b36a1b1388c174d5b8398fcbb0bdb757] Merge master into staging-nixos
> git bisect good ccea08b7b36a1b1388c174d5b8398fcbb0bdb757
> # bad: [6db9eed557c922da1e7dc287726e6e492ef24326] python313Packages.langchain: fix build (#461518)
> git bisect bad 6db9eed557c922da1e7dc287726e6e492ef24326
> # good: [1a41aa87c3f40f7493b3e4da391b2ff3af9ffb24] linux_6_17: 6.17.7 -> 6.17.8
> git bisect good 1a41aa87c3f40f7493b3e4da391b2ff3af9ffb24
> # bad: [14dc5ea9de0e8745374ecbdc6916e3c85b15e4e3] staging-nixos merge for 2025-11-14 (#461577)
> git bisect bad 14dc5ea9de0e8745374ecbdc6916e3c85b15e4e3
> # good: [c4d1151093af5d483d1900d9214a65e68bc21560] flutterPackages-source: clean (#460613)
> git bisect good c4d1151093af5d483d1900d9214a65e68bc21560
>
> Most likely looking remaining candidate is 6725ca2dabdd ("gtk3: 3.24.50 → 3.24.51").
>
> I also found https://gitlab.com/qemu-project/qemu/-/issues/3191, which
> looks like the same thing.  Doesn't look like there's a patch yet.  I'll
> continue with the bisect in case it helps them to have the specific
> change that caused the regression.

Surprisingly I can reproduce on that commit's parent, so it's not the
gtk3 upgrade.  Glib upgrade, maybe?

# bad: [6725ca2dabdd4b50c78ec0186fc7b0cd477c632d] gtk3: 3.24.50 → 3.24.51
git bisect bad 6725ca2dabdd4b50c78ec0186fc7b0cd477c632d
# bad: [b0dc74cac643509650c2cdacbe7a18e2337520a0] gtk4: 4.20.0 → 4.20.2
git bisect bad b0dc74cac643509650c2cdacbe7a18e2337520a0
# good: [16db70aea3e6af351e8ad4c217745ec67d46c8ca] rusty-path-of-building: 0.2.6 -> 0.2.7 (#457937)
git bisect good 16db70aea3e6af351e8ad4c217745ec67d46c8ca

>>> To reproduce:
>>>
>>> cd host/rootfs
>>> nix-shell --run 'make clean && make run'
>>> View → virtiocon0
>>> Wait for kernel messages to finish
>>> Try typing, see that backspace doesn't work

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Re: [REGRESSION] Backspace no longer works in host/rootfs make run virtiocon0

[Alyssa Ross]

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Alyssa Ross <hi@alyssa.is> writes:

> Alyssa Ross <hi@alyssa.is> writes:
>
>> Alyssa Ross <hi@alyssa.is> writes:
>>
>>> Alyssa Ross <hi@alyssa.is> writes:
>>>
>>>> Bisected to the following range:
>>>>
>>>> 1e9c681 lib/nixpkgs.default.nix: update to nixos-unstable-small
>>>> f41b4ab tools: move lsvm out of subdirectory
>>>> 5ad749b tools: enable clippy::ptr-as-ptr lint
>>>> a4d7aa9 tools: enable clippy::map-unwrap-or lint
>>>> 3451250 host/rootfs: group VMM-backing services
>>>> 99f09ab pkgs: remove dbus overlay
>>>>
>>>> Most likely something in the Nixpkgs upgrade.  Needs further bisection.
>>>
>>> 1e9c6812b7497743a8473d5eb327c26c53cfbef2 is the first bad commit
>>> commit 1e9c6812b7497743a8473d5eb327c26c53cfbef2
>>> Author: Alyssa Ross <hi@alyssa.is>
>>> Date:   Sat Nov 22 13:13:28 2025 +0100
>>>
>>>     lib/nixpkgs.default.nix: update to nixos-unstable-small
>>>     
>>>     Signed-off-by: Alyssa Ross <hi@alyssa.is>
>>>
>>>  lib/nixpkgs.default.nix | 4 ++--
>>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>>
>>> So needs a Nixpkgs bisect.
>>
>> # bad: [2ac8b8ee243d52c2a4b429307c23fb72cac43a5c] gitlab-runner: apply patch for file variable handling (#463714)
>> # good: [b549734f6b3ec54bb9a611a4185d11ee31f52ee1] codex: 0.56.0 -> 0.57.0 (#460287)
>> git bisect start '2ac8b8ee243d52c2a4b429307c23fb72cac43a5c' 'b549734f6b3ec54bb9a611a4185d11ee31f52ee1'
>> # good: [ccea08b7b36a1b1388c174d5b8398fcbb0bdb757] Merge master into staging-nixos
>> git bisect good ccea08b7b36a1b1388c174d5b8398fcbb0bdb757
>> # good: [ccea08b7b36a1b1388c174d5b8398fcbb0bdb757] Merge master into staging-nixos
>> git bisect good ccea08b7b36a1b1388c174d5b8398fcbb0bdb757
>> # bad: [6db9eed557c922da1e7dc287726e6e492ef24326] python313Packages.langchain: fix build (#461518)
>> git bisect bad 6db9eed557c922da1e7dc287726e6e492ef24326
>> # good: [1a41aa87c3f40f7493b3e4da391b2ff3af9ffb24] linux_6_17: 6.17.7 -> 6.17.8
>> git bisect good 1a41aa87c3f40f7493b3e4da391b2ff3af9ffb24
>> # bad: [14dc5ea9de0e8745374ecbdc6916e3c85b15e4e3] staging-nixos merge for 2025-11-14 (#461577)
>> git bisect bad 14dc5ea9de0e8745374ecbdc6916e3c85b15e4e3
>> # good: [c4d1151093af5d483d1900d9214a65e68bc21560] flutterPackages-source: clean (#460613)
>> git bisect good c4d1151093af5d483d1900d9214a65e68bc21560
>>
>> Most likely looking remaining candidate is 6725ca2dabdd ("gtk3: 3.24.50 → 3.24.51").
>>
>> I also found https://gitlab.com/qemu-project/qemu/-/issues/3191, which
>> looks like the same thing.  Doesn't look like there's a patch yet.  I'll
>> continue with the bisect in case it helps them to have the specific
>> change that caused the regression.
>
> Surprisingly I can reproduce on that commit's parent, so it's not the
> gtk3 upgrade.  Glib upgrade, maybe?
>
> # bad: [6725ca2dabdd4b50c78ec0186fc7b0cd477c632d] gtk3: 3.24.50 → 3.24.51
> git bisect bad 6725ca2dabdd4b50c78ec0186fc7b0cd477c632d
> # bad: [b0dc74cac643509650c2cdacbe7a18e2337520a0] gtk4: 4.20.0 → 4.20.2
> git bisect bad b0dc74cac643509650c2cdacbe7a18e2337520a0
> # good: [16db70aea3e6af351e8ad4c217745ec67d46c8ca] rusty-path-of-building: 0.2.6 -> 0.2.7 (#457937)
> git bisect good 16db70aea3e6af351e8ad4c217745ec67d46c8ca

7a24e8bdb6258cb7d69470cc92ad1adf001d2f3a is the first bad commit
commit 7a24e8bdb6258cb7d69470cc92ad1adf001d2f3a
Author: Jan Tojnar <jtojnar@gmail.com>
Date:   Sat Sep 6 17:16:40 2025 +0000

    vte: 0.80.3 → 0.81.90
    
    https://gitlab.gnome.org/GNOME/vte/-/compare/0.80.3...0.81.90
    
    Changelog-Reviewed-By: Jan Tojnar <jtojnar@gmail.com>
    Co-authored-by: Bobby Rong <rjl931189261@126.com>

 nixos/modules/config/vte.nix    |  2 +-
 pkgs/by-name/vt/vte/package.nix | 14 ++++++++++++--
 2 files changed, 13 insertions(+), 3 deletions(-)

>>>> To reproduce:
>>>>
>>>> cd host/rootfs
>>>> nix-shell --run 'make clean && make run'
>>>> View → virtiocon0
>>>> Wait for kernel messages to finish
>>>> Try typing, see that backspace doesn't work

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Re: [REGRESSION] Backspace no longer works in host/rootfs make run virtiocon0

[Alyssa Ross]

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Alyssa Ross <hi@alyssa.is> writes:

> Alyssa Ross <hi@alyssa.is> writes:
>
>> Alyssa Ross <hi@alyssa.is> writes:
>>
>>> Alyssa Ross <hi@alyssa.is> writes:
>>>
>>>> Alyssa Ross <hi@alyssa.is> writes:
>>>>
>>>>> Bisected to the following range:
>>>>>
>>>>> 1e9c681 lib/nixpkgs.default.nix: update to nixos-unstable-small
>>>>> f41b4ab tools: move lsvm out of subdirectory
>>>>> 5ad749b tools: enable clippy::ptr-as-ptr lint
>>>>> a4d7aa9 tools: enable clippy::map-unwrap-or lint
>>>>> 3451250 host/rootfs: group VMM-backing services
>>>>> 99f09ab pkgs: remove dbus overlay
>>>>>
>>>>> Most likely something in the Nixpkgs upgrade.  Needs further bisection.
>>>>
>>>> 1e9c6812b7497743a8473d5eb327c26c53cfbef2 is the first bad commit
>>>> commit 1e9c6812b7497743a8473d5eb327c26c53cfbef2
>>>> Author: Alyssa Ross <hi@alyssa.is>
>>>> Date:   Sat Nov 22 13:13:28 2025 +0100
>>>>
>>>>     lib/nixpkgs.default.nix: update to nixos-unstable-small
>>>>     
>>>>     Signed-off-by: Alyssa Ross <hi@alyssa.is>
>>>>
>>>>  lib/nixpkgs.default.nix | 4 ++--
>>>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>>>
>>>> So needs a Nixpkgs bisect.
>>>
>>> # bad: [2ac8b8ee243d52c2a4b429307c23fb72cac43a5c] gitlab-runner: apply patch for file variable handling (#463714)
>>> # good: [b549734f6b3ec54bb9a611a4185d11ee31f52ee1] codex: 0.56.0 -> 0.57.0 (#460287)
>>> git bisect start '2ac8b8ee243d52c2a4b429307c23fb72cac43a5c' 'b549734f6b3ec54bb9a611a4185d11ee31f52ee1'
>>> # good: [ccea08b7b36a1b1388c174d5b8398fcbb0bdb757] Merge master into staging-nixos
>>> git bisect good ccea08b7b36a1b1388c174d5b8398fcbb0bdb757
>>> # good: [ccea08b7b36a1b1388c174d5b8398fcbb0bdb757] Merge master into staging-nixos
>>> git bisect good ccea08b7b36a1b1388c174d5b8398fcbb0bdb757
>>> # bad: [6db9eed557c922da1e7dc287726e6e492ef24326] python313Packages.langchain: fix build (#461518)
>>> git bisect bad 6db9eed557c922da1e7dc287726e6e492ef24326
>>> # good: [1a41aa87c3f40f7493b3e4da391b2ff3af9ffb24] linux_6_17: 6.17.7 -> 6.17.8
>>> git bisect good 1a41aa87c3f40f7493b3e4da391b2ff3af9ffb24
>>> # bad: [14dc5ea9de0e8745374ecbdc6916e3c85b15e4e3] staging-nixos merge for 2025-11-14 (#461577)
>>> git bisect bad 14dc5ea9de0e8745374ecbdc6916e3c85b15e4e3
>>> # good: [c4d1151093af5d483d1900d9214a65e68bc21560] flutterPackages-source: clean (#460613)
>>> git bisect good c4d1151093af5d483d1900d9214a65e68bc21560
>>>
>>> Most likely looking remaining candidate is 6725ca2dabdd ("gtk3: 3.24.50 → 3.24.51").
>>>
>>> I also found https://gitlab.com/qemu-project/qemu/-/issues/3191, which
>>> looks like the same thing.  Doesn't look like there's a patch yet.  I'll
>>> continue with the bisect in case it helps them to have the specific
>>> change that caused the regression.
>>
>> Surprisingly I can reproduce on that commit's parent, so it's not the
>> gtk3 upgrade.  Glib upgrade, maybe?
>>
>> # bad: [6725ca2dabdd4b50c78ec0186fc7b0cd477c632d] gtk3: 3.24.50 → 3.24.51
>> git bisect bad 6725ca2dabdd4b50c78ec0186fc7b0cd477c632d
>> # bad: [b0dc74cac643509650c2cdacbe7a18e2337520a0] gtk4: 4.20.0 → 4.20.2
>> git bisect bad b0dc74cac643509650c2cdacbe7a18e2337520a0
>> # good: [16db70aea3e6af351e8ad4c217745ec67d46c8ca] rusty-path-of-building: 0.2.6 -> 0.2.7 (#457937)
>> git bisect good 16db70aea3e6af351e8ad4c217745ec67d46c8ca
>
> 7a24e8bdb6258cb7d69470cc92ad1adf001d2f3a is the first bad commit
> commit 7a24e8bdb6258cb7d69470cc92ad1adf001d2f3a
> Author: Jan Tojnar <jtojnar@gmail.com>
> Date:   Sat Sep 6 17:16:40 2025 +0000
>
>     vte: 0.80.3 → 0.81.90
>     
>     https://gitlab.gnome.org/GNOME/vte/-/compare/0.80.3...0.81.90
>     
>     Changelog-Reviewed-By: Jan Tojnar <jtojnar@gmail.com>
>     Co-authored-by: Bobby Rong <rjl931189261@126.com>
>
>  nixos/modules/config/vte.nix    |  2 +-
>  pkgs/by-name/vt/vte/package.nix | 14 ++++++++++++--
>  2 files changed, 13 insertions(+), 3 deletions(-)

https://gitlab.gnome.org/GNOME/vte/-/issues/2924

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Re: [REGRESSION] Backspace no longer works in host/rootfs make run virtiocon0

[Alyssa Ross]

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Alyssa Ross <hi@alyssa.is> writes:

> Alyssa Ross <hi@alyssa.is> writes:
>
>> Alyssa Ross <hi@alyssa.is> writes:
>>
>>> Alyssa Ross <hi@alyssa.is> writes:
>>>
>>>> Alyssa Ross <hi@alyssa.is> writes:
>>>>
>>>>> Alyssa Ross <hi@alyssa.is> writes:
>>>>>
>>>>>> Bisected to the following range:
>>>>>>
>>>>>> 1e9c681 lib/nixpkgs.default.nix: update to nixos-unstable-small
>>>>>> f41b4ab tools: move lsvm out of subdirectory
>>>>>> 5ad749b tools: enable clippy::ptr-as-ptr lint
>>>>>> a4d7aa9 tools: enable clippy::map-unwrap-or lint
>>>>>> 3451250 host/rootfs: group VMM-backing services
>>>>>> 99f09ab pkgs: remove dbus overlay
>>>>>>
>>>>>> Most likely something in the Nixpkgs upgrade.  Needs further bisection.
>>>>>
>>>>> 1e9c6812b7497743a8473d5eb327c26c53cfbef2 is the first bad commit
>>>>> commit 1e9c6812b7497743a8473d5eb327c26c53cfbef2
>>>>> Author: Alyssa Ross <hi@alyssa.is>
>>>>> Date:   Sat Nov 22 13:13:28 2025 +0100
>>>>>
>>>>>     lib/nixpkgs.default.nix: update to nixos-unstable-small
>>>>>     
>>>>>     Signed-off-by: Alyssa Ross <hi@alyssa.is>
>>>>>
>>>>>  lib/nixpkgs.default.nix | 4 ++--
>>>>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>>>>
>>>>> So needs a Nixpkgs bisect.
>>>>
>>>> # bad: [2ac8b8ee243d52c2a4b429307c23fb72cac43a5c] gitlab-runner: apply patch for file variable handling (#463714)
>>>> # good: [b549734f6b3ec54bb9a611a4185d11ee31f52ee1] codex: 0.56.0 -> 0.57.0 (#460287)
>>>> git bisect start '2ac8b8ee243d52c2a4b429307c23fb72cac43a5c' 'b549734f6b3ec54bb9a611a4185d11ee31f52ee1'
>>>> # good: [ccea08b7b36a1b1388c174d5b8398fcbb0bdb757] Merge master into staging-nixos
>>>> git bisect good ccea08b7b36a1b1388c174d5b8398fcbb0bdb757
>>>> # good: [ccea08b7b36a1b1388c174d5b8398fcbb0bdb757] Merge master into staging-nixos
>>>> git bisect good ccea08b7b36a1b1388c174d5b8398fcbb0bdb757
>>>> # bad: [6db9eed557c922da1e7dc287726e6e492ef24326] python313Packages.langchain: fix build (#461518)
>>>> git bisect bad 6db9eed557c922da1e7dc287726e6e492ef24326
>>>> # good: [1a41aa87c3f40f7493b3e4da391b2ff3af9ffb24] linux_6_17: 6.17.7 -> 6.17.8
>>>> git bisect good 1a41aa87c3f40f7493b3e4da391b2ff3af9ffb24
>>>> # bad: [14dc5ea9de0e8745374ecbdc6916e3c85b15e4e3] staging-nixos merge for 2025-11-14 (#461577)
>>>> git bisect bad 14dc5ea9de0e8745374ecbdc6916e3c85b15e4e3
>>>> # good: [c4d1151093af5d483d1900d9214a65e68bc21560] flutterPackages-source: clean (#460613)
>>>> git bisect good c4d1151093af5d483d1900d9214a65e68bc21560
>>>>
>>>> Most likely looking remaining candidate is 6725ca2dabdd ("gtk3: 3.24.50 → 3.24.51").
>>>>
>>>> I also found https://gitlab.com/qemu-project/qemu/-/issues/3191, which
>>>> looks like the same thing.  Doesn't look like there's a patch yet.  I'll
>>>> continue with the bisect in case it helps them to have the specific
>>>> change that caused the regression.
>>>
>>> Surprisingly I can reproduce on that commit's parent, so it's not the
>>> gtk3 upgrade.  Glib upgrade, maybe?
>>>
>>> # bad: [6725ca2dabdd4b50c78ec0186fc7b0cd477c632d] gtk3: 3.24.50 → 3.24.51
>>> git bisect bad 6725ca2dabdd4b50c78ec0186fc7b0cd477c632d
>>> # bad: [b0dc74cac643509650c2cdacbe7a18e2337520a0] gtk4: 4.20.0 → 4.20.2
>>> git bisect bad b0dc74cac643509650c2cdacbe7a18e2337520a0
>>> # good: [16db70aea3e6af351e8ad4c217745ec67d46c8ca] rusty-path-of-building: 0.2.6 -> 0.2.7 (#457937)
>>> git bisect good 16db70aea3e6af351e8ad4c217745ec67d46c8ca
>>
>> 7a24e8bdb6258cb7d69470cc92ad1adf001d2f3a is the first bad commit
>> commit 7a24e8bdb6258cb7d69470cc92ad1adf001d2f3a
>> Author: Jan Tojnar <jtojnar@gmail.com>
>> Date:   Sat Sep 6 17:16:40 2025 +0000
>>
>>     vte: 0.80.3 → 0.81.90
>>     
>>     https://gitlab.gnome.org/GNOME/vte/-/compare/0.80.3...0.81.90
>>     
>>     Changelog-Reviewed-By: Jan Tojnar <jtojnar@gmail.com>
>>     Co-authored-by: Bobby Rong <rjl931189261@126.com>
>>
>>  nixos/modules/config/vte.nix    |  2 +-
>>  pkgs/by-name/vt/vte/package.nix | 14 ++++++++++++--
>>  2 files changed, 13 insertions(+), 3 deletions(-)
>
> https://gitlab.gnome.org/GNOME/vte/-/issues/2924

Fixed in 65d38a7 ("lib/nixpkgs.default.nix: update to
nixos-unstable-small").

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