Oh, it works fine on X64linux VM

Open Smalltalk Cog[Spur] VM [CoInterpreterPrimitives VMMaker.oscog-dtl.3185]
Unix built on Jun  2 2022 15:26:05 Compiler: Clang 9.0.0 (tags/RELEASE_900/final)
platform sources revision VM: 202206021410 runner at fv-az125-921:work/opensmalltalk-vm/opensmalltalk-vm Date: Thu Jun 2 16:10:44 2022 CommitHash: c9fd365 Plugins: 202206021410 runner at fv-az125-921:work/opensmalltalk-vm/opensmalltalk-vm
CoInterpreter VMMaker.oscog-dtl.3185 uuid: 0e7f07b8-eed6-4362-b223-86c98594ddb9 Jun  2 2022
StackToRegisterMappingCogit VMMaker.oscog-mt.3179 uuid: c6fbcb07-2a19-ed4f-8b40-9c119a70882a Jun  2 2022

So unfortunately an ARMv8 specific issue. Poo.

tim
--
tim Rowledge; tim at rowledge.org; http://www.rowledge.org/tim
Oxymorons: Religious tolerance