Couldn't allocate initial old space -- not enough swap space?

[jrc]

I'm trying to run Self 2024.1 in a freshly created ubuntu-20.04.6-desktop-amd64 virtual machine, on my Mac using UTM https://getutm.app/ (QEMU-based). After installing the various dependencies, I got Self to build, but when I run it, it crashes:

~/self/objects$ ../vm/Self 
Self VM fatal error (/home/john/self/vm/src/any/memory/generation.cpp, line 307): Couldn't allocate initial old space -- not enough swap space?

VM Version: 2023.1.13, Wed 23 Oct 24 17:20:42 Linux i386 (2024.1)

Self process 1329 on john-Standard-PC-Q35-ICH9-2009 has crashed.
Do you want to:
   1) Quit Self (optionally attempting to write a snapshot)
   2) Try to print the Self stack
   3) Try to return to the Self prompt
   4) Force a core dump
   5) Print the interrupted context registers
Your choice: 1
Enter snapshot name (hit return to omit snapshot) > 
No snapshot specified, will skip this step
~/self/objects$ free -h
              total        used        free      shared  buff/cache   available
Mem:          7,7Gi       640Mi       6,6Gi        14Mi       579Mi       6,9Gi
Swap:         2,0Gi          0B       2,0Gi
~/self/objects$ 

Not sure how to go about getting past this. As far as I can tell, there's plenty of memory and swap space.