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[BUG]: When I connect to Mullvad VPN, Bar crashes. #643

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opened 2026-01-05 14:52:09 +01:00 by adam · 7 comments
adam commented 2026-01-05 14:52:09 +01:00
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Originally created by @nlaocs on GitHub (Jul 9, 2025).

Summary

When using komorebi bar while connected to Mullvad VPN, the following error occurs.

 .\komorebi-bar.exe
2025-07-09T01:17:19.370243Z  INFO komorebi_bar: found configuration file: C:\Users\nlaocs\komorebi.bar.json
2025-07-09T01:17:19.381580Z  INFO komorebi_bar: watching configuration file for changes
2025-07-09T01:17:19.626251Z  INFO komorebi_bar::bar: attempting
to add custom font family: JetBrains Mono NFP
2025-07-09T01:17:19.640441Z  INFO komorebi_bar: subscribed to komorebi notifications: "komorebi-bar-subapical"
2025-07-09T01:17:19.928924Z  WARN komorebi_bar::bar: couldn't find the monitor index of this bar, if the bar is starting up this is normal until it receives the first state from komorebi.
2025-07-09T01:17:19.929087Z  INFO komorebi_bar::bar: widget configuration options applied
2025-07-09T01:17:19.929165Z  INFO komorebi_bar::bar: attempting
to add custom font family: JetBrains Mono NFP
2025-07-09T01:17:19.990526Z  WARN komorebi_bar::bar: couldn't find the monitor index of this bar, if the bar is starting up this is normal until it receives the first state from komorebi.
2025-07-09T01:17:19.990662Z  INFO komorebi_bar::bar: widget configuration options applied
2025-07-09T01:17:19.999320Z  INFO komorebi_bar::bar: Found this
bar's monitor. The bar will be enabled!
2025-07-09T01:17:21.655071Z  INFO komorebi_bar::bar: attempting
to add custom font family: JetBrains Mono NFP
2025-07-09T01:17:21.714139Z  INFO komorebi_bar::bar: work area offset applied to monitor: 0
2025-07-09T01:17:21.714303Z  INFO komorebi_bar::bar: widget configuration options applied
2025-07-09T01:17:21.715836Z  INFO komorebi_bar::bar: updated bar position
2025-07-09T01:17:21.716019Z  INFO komorebi_bar::bar: updated bar position
The application panicked (crashed).
Message:  assertion `left == right` failed
  left: 0
 right: 6
Location: C:\Users\runneradmin\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\netdev-0.34.0\src\interface\windows.rs:44

Backtrace omitted. Run with RUST_BACKTRACE=1 environment variable to display it.
Run with RUST_BACKTRACE=full to include source snippets.

When I launch the bar with VPN enabled, it crashes immediately. Even if I disable VPN before launching and then enable it after launching, it still crashes.

Version Information

OS name: Microsoft Windows 11 Pro
OS version: 10.0.26100 N/A ビルド 26100

(Extracted manually because the language setting is Japanese.)

PS C:\Users\nlaocs> komorebic --version
komorebic 0.1.37
tag:v0.1.37
commit_hash:00384ce3
build_time:2025-05-17 19:16:53 +00:00
build_env:rustc 1.87.0 (17067e9ac 2025-05-09),stable-x86_64-pc-windows-msvc```

### Komorebi Configuration

```json
{
  "$schema": "https://raw.githubusercontent.com/LGUG2Z/komorebi/v0.1.35/schema.bar.json",
  "monitor": 0,
  "font_family": "JetBrains Mono NFP",
  "theme": {
    "palette": "Base16",
    "name": "Ashes",
    "accent": "Base0D"
  },
  "left_widgets": [
    {
      "Komorebi": {
        "workspaces": {
          "enable": true,
          "hide_empty_workspaces": false
        },
        "layout": {
          "enable": true
        },
        "focused_window": {
          "enable": true,
          "show_icon": true
        }
      }
    }
  ],
  "right_widgets": [
    {
      "Update": {
        "enable": true
      }
    },
    {
      "Media": {
        "enable": true
      }
    },
    {
      "Storage": {
        "enable": true
      }
    },
    {
      "Memory": {
        "enable": true
      }
    },
    {
      "Network": {
        "enable": true,
        "show_total_data_transmitted": true,
        "show_network_activity": true
      }
    },
    {
      "Date": {
        "enable": true,
        "format": "DayDateMonthYear"
      }
    },
    {
      "Time": {
        "enable": true,
        "format": "TwentyFourHour"
      }
    },
    {
      "Battery": {
        "enable": true
      }
    }
  ]
}

Hotkey Configuration

N/A

Output of komorebic check

PS C:\Users\nlaocs> komorebic check
No KOMOREBI_CONFIG_HOME detected, defaulting to C:\Users\nlaocs

Looking for configuration files in C:\Users\nlaocs

Found komorebi.json; this file can be passed to the start command with the --config flag

Found C:\Users\nlaocs\.config\whkdrc; key bindings will be loaded from here when whkd is started, and you can start it automatically using the --whkd flag
Originally created by @nlaocs on GitHub (Jul 9, 2025). ### Summary When using komorebi bar while connected to Mullvad VPN, the following error occurs. ``` .\komorebi-bar.exe 2025-07-09T01:17:19.370243Z INFO komorebi_bar: found configuration file: C:\Users\nlaocs\komorebi.bar.json 2025-07-09T01:17:19.381580Z INFO komorebi_bar: watching configuration file for changes 2025-07-09T01:17:19.626251Z INFO komorebi_bar::bar: attempting to add custom font family: JetBrains Mono NFP 2025-07-09T01:17:19.640441Z INFO komorebi_bar: subscribed to komorebi notifications: "komorebi-bar-subapical" 2025-07-09T01:17:19.928924Z WARN komorebi_bar::bar: couldn't find the monitor index of this bar, if the bar is starting up this is normal until it receives the first state from komorebi. 2025-07-09T01:17:19.929087Z INFO komorebi_bar::bar: widget configuration options applied 2025-07-09T01:17:19.929165Z INFO komorebi_bar::bar: attempting to add custom font family: JetBrains Mono NFP 2025-07-09T01:17:19.990526Z WARN komorebi_bar::bar: couldn't find the monitor index of this bar, if the bar is starting up this is normal until it receives the first state from komorebi. 2025-07-09T01:17:19.990662Z INFO komorebi_bar::bar: widget configuration options applied 2025-07-09T01:17:19.999320Z INFO komorebi_bar::bar: Found this bar's monitor. The bar will be enabled! 2025-07-09T01:17:21.655071Z INFO komorebi_bar::bar: attempting to add custom font family: JetBrains Mono NFP 2025-07-09T01:17:21.714139Z INFO komorebi_bar::bar: work area offset applied to monitor: 0 2025-07-09T01:17:21.714303Z INFO komorebi_bar::bar: widget configuration options applied 2025-07-09T01:17:21.715836Z INFO komorebi_bar::bar: updated bar position 2025-07-09T01:17:21.716019Z INFO komorebi_bar::bar: updated bar position The application panicked (crashed). Message: assertion `left == right` failed left: 0 right: 6 Location: C:\Users\runneradmin\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\netdev-0.34.0\src\interface\windows.rs:44 Backtrace omitted. Run with RUST_BACKTRACE=1 environment variable to display it. Run with RUST_BACKTRACE=full to include source snippets. ``` When I launch the bar with VPN enabled, it crashes immediately. Even if I disable VPN before launching and then enable it after launching, it still crashes. ### Version Information ``` OS name: Microsoft Windows 11 Pro OS version: 10.0.26100 N/A ビルド 26100 ``` (Extracted manually because the language setting is Japanese.) ``` PS C:\Users\nlaocs> komorebic --version komorebic 0.1.37 tag:v0.1.37 commit_hash:00384ce3 build_time:2025-05-17 19:16:53 +00:00 build_env:rustc 1.87.0 (17067e9ac 2025-05-09),stable-x86_64-pc-windows-msvc``` ### Komorebi Configuration ```json { "$schema": "https://raw.githubusercontent.com/LGUG2Z/komorebi/v0.1.35/schema.bar.json", "monitor": 0, "font_family": "JetBrains Mono NFP", "theme": { "palette": "Base16", "name": "Ashes", "accent": "Base0D" }, "left_widgets": [ { "Komorebi": { "workspaces": { "enable": true, "hide_empty_workspaces": false }, "layout": { "enable": true }, "focused_window": { "enable": true, "show_icon": true } } } ], "right_widgets": [ { "Update": { "enable": true } }, { "Media": { "enable": true } }, { "Storage": { "enable": true } }, { "Memory": { "enable": true } }, { "Network": { "enable": true, "show_total_data_transmitted": true, "show_network_activity": true } }, { "Date": { "enable": true, "format": "DayDateMonthYear" } }, { "Time": { "enable": true, "format": "TwentyFourHour" } }, { "Battery": { "enable": true } } ] } ``` ### Hotkey Configuration N/A ### Output of komorebic check ``` PS C:\Users\nlaocs> komorebic check No KOMOREBI_CONFIG_HOME detected, defaulting to C:\Users\nlaocs Looking for configuration files in C:\Users\nlaocs Found komorebi.json; this file can be passed to the start command with the --config flag Found C:\Users\nlaocs\.config\whkdrc; key bindings will be loaded from here when whkd is started, and you can start it automatically using the --whkd flag ```
adam added the bug label 2026-01-05 14:52:09 +01:00
adam closed this issue 2026-01-05 14:52:09 +01:00
adam commented 2026-01-05 14:52:10 +01:00
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@CtByte commented on GitHub (Jul 10, 2025):

can you try with the network widget disabled?

@CtByte commented on GitHub (Jul 10, 2025): can you try with the network widget disabled?
adam commented 2026-01-05 14:52:10 +01:00
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@nlaocs commented on GitHub (Jul 10, 2025):

It started up fine without the network widget.

@nlaocs commented on GitHub (Jul 10, 2025): It started up fine without the network widget.
adam commented 2026-01-05 14:52:10 +01:00
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@CtByte commented on GitHub (Jul 10, 2025):

I've been suspecting the default interface part of the network widget to be the culprit.
Could you also try with that disabled? Something like this:

    {
      "Network": {
        "enable": true,
        "data_refresh_interval": 2,
        "show_default_interface": false, // this one here
        "show_total_activity": false,
        "show_activity": true
      }
    },
@CtByte commented on GitHub (Jul 10, 2025): I've been suspecting the `default interface` part of the network widget to be the culprit. Could you also try with that disabled? Something like this: ```json { "Network": { "enable": true, "data_refresh_interval": 2, "show_default_interface": false, // this one here "show_total_activity": false, "show_activity": true } }, ```
adam commented 2026-01-05 14:52:10 +01:00
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@nlaocs commented on GitHub (Jul 10, 2025):

If any of the network settings are set to true, the bar will crash.
If only enable is set to true, the bar will not crash (although this is meaningless).

@nlaocs commented on GitHub (Jul 10, 2025): If any of the network settings are set to true, the bar will crash. If only enable is set to true, the bar will not crash (although this is meaningless).
adam commented 2026-01-05 14:52:10 +01:00
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@CtByte commented on GitHub (Jul 10, 2025):

That is interesting, thank you for testing this.

I use different VPNs for work and the bar does not crash, but I have also seen issues with other VPNs in the past 🤔

One solution could be to silently "disable" the widget on any error, instead of letting it crash the whole bar. I will keep this in mind and when I get the time will look into it.

@CtByte commented on GitHub (Jul 10, 2025): That is interesting, thank you for testing this. I use different VPNs for work and the bar does not crash, but I have also seen issues with other VPNs in the past 🤔 One solution could be to silently "disable" the widget on any error, instead of letting it crash the whole bar. I will keep this in mind and when I get the time will look into it.
adam commented 2026-01-05 14:52:10 +01:00
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@CtByte commented on GitHub (Oct 5, 2025):

@nlaocs Hi there, would it be possible for you to test if this version still fails for you?

@CtByte commented on GitHub (Oct 5, 2025): @nlaocs Hi there, would it be possible for you to test if [this version](https://github.com/LGUG2Z/komorebi/actions/runs/18235052593) still fails for you?
adam commented 2026-01-05 14:52:10 +01:00
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@nlaocs commented on GitHub (Oct 6, 2025):

The bar no longer crashes when launched with a VPN enabled.
I tested this after reverting the config to the state where it crashed in the previous version.
Thank you so much for fixing it!

@nlaocs commented on GitHub (Oct 6, 2025): The bar no longer crashes when launched with a VPN enabled. I tested this after reverting the config to the state where it crashed in the previous version. Thank you so much for fixing it!
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Reference: starred/komorebi#643