Ollama / Ollama
Ollama Image Generation Panics on macOS 0.23.1 — Z-Image MLX Runner Bug
Fix Ollama image generation panic and segfault after upgrading to 0.23.1 on macOS Includes evidence for Ollama troubleshooting demand.
- Category
- Ollama
- Error signature
panic: runtime error: index out of range [0] with length 0- Quick fix
- Compare the failing environment with a known working setup, then change one configuration value at a time.
- Updated
What this error means
panic: runtime error: index out of range [0] with length 0 is a Ollama failure pattern reported for developers trying to fix ollama image generation panic and segfault after upgrading to 0.23.1 on macos. Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.
Why this happens
Ollama image generation on macOS broken in 0.23.1. Panic: ‘index out of range [0] with length 0’ in GroupNormLayer.Forward (zimage/vae.go:48), followed by segfault in ArrayToImage/EncodeImageBase64. Worked in 0.22.1. 5 comments confirm.
Common causes
- Ollama’s experimental image generation feature crashes with panic and segfault after 0.23.1 upgrade. Users upgrading from 0.22.1 (where it worked) lose image generation capability entirely.
- Ollama image generation on macOS broken in 0.23.1. Panic: ‘index out of range [0] with length 0’ in GroupNormLayer.Forward (zimage/vae.go:48), followed by segfault in ArrayToImage/EncodeImageBase64. Worked in 0.22.1. 5 comments confirm.
Quick fixes
- Confirm the exact error signature matches
panic: runtime error: index out of range [0] with length 0. - Check the Ollama account, local tool state, and provider configuration involved in the failing workflow.
- Compare the failing environment with a known working setup, then change one configuration value at a time.
Platform/tool-specific checks
- Verify the command, editor, extension, or API client that produced the error.
- Compare local settings with CI, deployment, or editor-level settings when the error appears in only one environment.
- Avoid deleting credentials, local model data, or project settings until the failing scope is clear.
Step-by-step troubleshooting
- Capture the exact error message and the command, editor action, or request that triggered it.
- Check whether the failure is account/auth, quota/rate, model/provider, local runtime, or deployment configuration.
- Review the source evidence below and compare it with your environment.
- Apply one change at a time and rerun the smallest failing action.
- Keep the working fix documented for the team or deployment environment.
How to prevent it
- Keep provider/tool configuration documented.
- Record non-secret diagnostics such as tool version, provider name, model name, and command path.
- Add a lightweight check before CI or production workflows depend on the tool.
Sources checked
Evidence note: Ollama image generation on macOS broken in 0.23.1. Panic: ‘index out of range [0] with length 0’ in GroupNormLayer.Forward (zimage/vae.go:48), followed by segfault in ArrayToImage/EncodeImageBase64. Worked in 0.22.1. 5 comments confirm.
Related errors
- Ollama MLX runner crash
- Ollama image generation not working
- Ollama z-image model error
FAQ
What should I check first?
Start with the exact panic: runtime error: index out of range [0] with length 0 text and the smallest action that reproduces it.
Can I ignore this error?
No. Treat it as a failed Ollama workflow until the root cause is understood.
Is this guaranteed to have one fix?
No. The imported evidence supports the troubleshooting path above, but tool behavior can vary by account, plan, version, provider, and local configuration.
How do I know the fix worked?
Rerun the same command, editor action, or request. The fix is working when that action completes without panic: runtime error: index out of range [0] with length 0.