The command "src list -f{1} @ -- file.txt" is used internally in vc.el in emacs to retrieve the revision number to display on the modeline. The command produces the error "src: unexpected -f{1} option", leading to the function `vc-src-working-revision' in vc-src.el returning 0 and displaying "SRC-0" in the modeline. I recently updated to SRC v1.38 from 1.32, and this worked in 1.32. Result of "src version": ``` src: 1.38 python: 3.9.2 RCS: 5.10.0 platform: linux ``` Thanks