Every request to ollama ends up in "Cannot read properties of undefined (reading 'createMessageContent')"

[xpomul]

Bug Description:

This seems to be a regression in Theia 1.60, introduced with #15092 (see below).
Since upgrading to Theia 1.60, every request to ollama (in the code, every call to OllamaModel.request fails with the error Cannot read properties of undefined (reading 'createMessageContent')

Steps to Reproduce:

1. Start Theia IDE or a Theia application that includes the AI modules.
2. Enable AI, Configure ollama (note: this does not even need a local ollama server running to reproduce), configure the chat naming agent and the Orchestrator agent to use an ollama model.
3. Open AI Chat and enter any message.

Expected behavior:

The chat agent answers the message.

Actual behavior:

The chat view reports the error:
Cannot read properties of undefined (reading 'createMessageContent')

Additional Information

• Operating System: MacOS, Arm64 (M1 MacBook)
• Theia Version: Theia IDE 1.60.200

Anaylsis:

In the line

theia/packages/ai-ollama/src/node/ollama-language-model.ts

Line 64 in fefa45f

messages: request.messages.map(this.toOllamaMessage).filter(m => m !== undefined) as Message[],

and the following line, we pass methods to the map() function which causes this to be unbound when the methods are called.

This was like this already in previous versions, but only since #15092, this is referenced within toOllamaMessage() which introduces the bug.

[Vadim-Zenin]

The issue exists in downloaded TheiaIDE.AppImage. Date is: 2025-05-06

[sdirix]

The fix is in Theia 1.61. The Theia IDE with Theia 1.61 is not yet released because of infrastructure issues, however we expect them to be resolved soonish.

[z0rb]

@sdirix Hi. How is the infrastructure doing? I would like to demo Theia as an AI solution and this is a show stopper. I managed to patch this in the compiled TS/JS, but would be great if I can just download the AppImage (and extract it). Have a makeshift patch with sed replacing the function calls in the JS file ... it just hurts seeing that in a pipeline. 😅

(Don't know if there is a public site where we can check the status of the infra instead of asking.)

[xpomul]

@z0rb not sure if this is the place: https://github.com/eclipse-theia/theia-ide/actions/workflows/build.yml?query=branch%3Amaster but maybe you are able to get a usable preliminary artifact there?

[sdirix]

Hi @z0rb @xpomul, Theia IDE 1.61 is currently under active testing in the preview channel. You can consume this version by changing the update channel in the Theia IDE preferences and restarting the IDE. See here for the discussion of the current testing. As there are no issues found, the preview build will likely be promoted within the next days, possibly even tomorrow.

[z0rb]

@xpomul Thanks, I downloaded the linux.zip and the app image was in it. It worked nicely for the demo.

@sdirix Thanks for the info. I tried updating, but it didn't help in case of the extracted app image. Good to learn the structure of the release process for the future. I can then look into the discussions in case I need anything from an unreleased version.