LGTM
commit 4078b52f67e6e5193e72648a8f1a44e8154636e7 Author: Han-Wen Nienhuys <hanwen@lilypond.org> Date: Sat Feb 8 21:04:28 2020 +0100 GUILE2: softcode GC environment tuning Disable multithreaded GC and explain why https://sourceforge.net/p/testlilyissues/issues/5718 http://codereview.appspot.com/561390043