I have managed to work around the d8 GC bug by adding the --nocollect_maps when invoking d8. That means that after 10 minutes of execution on my MacBook Pro, the "make bootstrap" ends with:
... Linking machine code for: "backend/x86/config.js" Linking machine code for: "backend/x86/ir-to-asm.js" Linking machine code for: "backend/x86/asm.js" Linking machine code for: "main.js" Tachyon initialization complete
Yay!
Now... how do we actually execute the bootstrapped Tachyon?
I guess the champagne bottle won't be spending much more time in the fridge... ;-)
Marc