This patch marks 2 outstanding ambiguous roots and appears to solve
crashing bugs I had been experiencing with igc/mps and pgtk.

I have run this locally today, and I would have normally faced crashes at timer expiration, this appears to be holding up.



In GNU Emacs 31.0.50 (build 3, x86_64-pc-linux-gnu, GTK+ Version
 3.24.43, cairo version 1.18.0) of 2024-11-06 built on solidus.local
Repository revision: 96de0bf0ba9161af5d3f783b45a5a9de530b6f95
Repository branch: scratch/igc
System Description: Fedora Linux 41 (Sway)

Configured using: