[BUG] SystemError: kill() failed: EPERM: Operation not permitted

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Claude Code errored out and completely crashed.

What Should Happen?

It should have continued working on the task until completion.

Error Messages/Logs

● Bash(chmod +x
      /home/vrspace4/docker/k3s-workload-cluster/install-k3s-host.sh)
  ⎿  (No content)

● Let me create the .kube directory if it doesn't exist:

● Bash(mkdir -p /home/vrspace4/.kube && ls -la /home/vrspace4/.kube/)
  ⎿  total 8                                             
     drwxrwxr-x  2 vrspace4 vrspace4 4096 Sep 17 14:57 .
     drwxr-x--- 52 vrspace4 vrspace4 4096 Sep 17 14:57 ..

● Now let's run the installation:

● Bash(sudo /home/vrspace4/docker/k3s-workload-cluster/install-  timeout: 
      k3s-host.sh)                                               3m
  ⎿  Error: Command timed out after 3m 0.0s Created symlink 
     /etc/systemd/system/multi-user.target.wants/k3s.service → 
     /etc/systemd/system/k3s.service.

     Installing K3s workload cluster on host...
     [INFO]  Finding release for channel stable
     [INFO]  Using v1.33.4+k3s1 as release
     [INFO]  Downloading hash https://github.com/k3s-io/k3s/releases/downlo
     ad/v1.33.4+k3s1/sha256sum-amd64.txt
     [INFO]  Downloading binary 
     https://github.com/k3s-io/k3s/releases/download/v1.33.4+k3s1/k3s
     [INFO]  Verifying binary download
     [INFO]  Installing k3s to /usr/local/bin/k3s
     [INFO]  Skipping installation of SELinux RPM
     … +9 lines (ctrl+o to see all)

✢ Installing K3s directly on host for workload cluster… 
  ⎿  Next: Configure K3s with custom settings

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  ⏵⏵ bypass permissions on (shift+tab to cycle)                        ◯
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SystemError: kill() failed: EPERM: Operation not permitted
 syscall: "kill",
   errno: 1,
    code: "EPERM"

      at tJZ (/$bunfs/root/claude:122:3104)
      at <anonymous> (/$bunfs/root/claude:122:2976)
      at forEach (1:11)
      at <anonymous> (/$bunfs/root/claude:122:2951)
      at forEach (1:11)
      at sJZ (/$bunfs/root/claude:122:2923)
      at <anonymous> (/$bunfs/root/claude:122:2850)
      at Q (/$bunfs/root/claude:122:3333)
      at emit (node:events:98:22)

Bun v1.2.19 (Linux x64 baseline)

Steps to Reproduce

go ahead with #2, install k3s directly on host

● I'll install K3s directly on the host for a proper workload cluster,
separate from Rancher's embedded K3s.

● First, let me check if K3s is already installed on the host:

● Bash(which k3s || echo "K3s not installed")
⎿ K3s not installed

● Bash(systemctl status k3s 2>/dev/null || echo "K3s service not found")
⎿ K3s service not found

● Good, K3s is not installed. Let me create an installation script
with proper configuration:

● Write(k3s-workload-cluster/install-k3s-host.sh)
⎿ Wrote 47 lines to k3s-workload-cluster/install-k3s-host.sh
#!/bin/bash
# K3s Workload Cluster Installation Script
# This installs K3s directly on the host, separate from Rancher's
embedded K3s
set -e
echo "Installing K3s workload cluster on host..."
# Set installation directory for K3s
… +37 lines (ctrl+o to expand)

● Bash(chmod +x
/home/vrspace4/docker/k3s-workload-cluster/install-k3s-host.sh)
⎿ (No content)

● Let me create the .kube directory if it doesn't exist:

● Bash(mkdir -p /home/vrspace4/.kube && ls -la /home/vrspace4/.kube/)
⎿ total 8
drwxrwxr-x 2 vrspace4 vrspace4 4096 Sep 17 14:57 .
drwxr-x--- 52 vrspace4 vrspace4 4096 Sep 17 14:57 ..

● Now let's run the installation:

● Bash(sudo /home/vrspace4/docker/k3s-workload-cluster/install- timeout:
k3s-host.sh) 3m
⎿ Error: Command timed out after 3m 0.0s Created symlink
/etc/systemd/system/multi-user.target.wants/k3s.service →
/etc/systemd/system/k3s.service.

Installing K3s workload cluster on host...
[INFO] Finding release for channel stable
[INFO] Using v1.33.4+k3s1 as release
[INFO] Downloading hash https://github.com/k3s-io/k3s/releases/downlo
ad/v1.33.4+k3s1/sha256sum-amd64.txt
[INFO] Downloading binary
https://github.com/k3s-io/k3s/releases/download/v1.33.4+k3s1/k3s
[INFO] Verifying binary download
[INFO] Installing k3s to /usr/local/bin/k3s
[INFO] Skipping installation of SELinux RPM
… +9 lines (ctrl+o to see all)

✢ Installing K3s directly on host for workload cluster…
⎿ Next: Configure K3s with custom settings

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

1.0.117 (Claude Code)

Platform

Other

Operating System

Ubuntu/Debian Linux

Terminal/Shell

VS Code integrated terminal

Additional Information

Running vscode on Windows 11 and ssh remoting into a Ubuntu machine running the latest Claude Code. The terminal used inside vscode is called fish.