Misc. bug: WebUI <think> block content disappears when it contains quotes #16299

Name and Version

commit d8359f5 (tag: b6615, upstream/master, origin/master, origin/HEAD, master)

Operating systems

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Which llama.cpp modules do you know to be affected?

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Command line

Problem description & steps to reproduce

Assistant messages that include a </think> block containing a double quote render correctly while streaming, but the reasoning text disappears after the message list re-renders or when a saved conversation is imported.
The parser that strips </think> blocks during rehydration drops the reasoning payload, leaving the thinking pane empty even though the original stream contained text.

Steps to reproduce:

(I used Llama-3_3-Nemotron-Super-49B)

• Generate an assistant reply with a </think> block containing a quote ".
• During the streaming -> reasoning text is visible.
• After assistant response, observe that the thinking panel for that message is partial or empty.
• Refresh the page or import the saved conversation JSON -> same.

Expected result:
The </think> block remains intact and visible after any re-render or import.

Actual result:
The </think> block becomes blank or incomplete whenever it contains a double quote, on re-render or import.

Fix:
Switch parsing logic from split('</think>') to a regex match that preserves all content inside <think> and removes only the matched segment.

Working proposal : master...ServeurpersoCom:llama.cpp:fix-thinking-blocks-with-quotes

First Bad Commit

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