After building Groff from master, I noticed one of Roff.js's regression tests failed when asserting compatibility mode:
*Command:* printf '.ds FOO BAR\n\\*[FOO]' | groff -C -Tutf8 | head -n1 *Expected output:* FOO] *Actual output:* BAR This only started happening since I installed a freshly-built Groff with the latest changes. Groff 1.22.4 (and earlier) don't have this problem.