If a tbl(7) layout contains unknown font modifiers, fall back to the

default font rather than failing the whole table.
Needed by some pages in books/man-pages-posix.
Written on the plane back from EuroBSDCon in Sofia.

1 files changed, 5 insertions, 0 deletions

diff --git a/tbl_layout.c b/tbl_layout.c
index b0e0ae98..b78e8881 100644
--- a/tbl_layout.c
+++ b/tbl_layout.c
@@ -201,6 +201,11 @@ mod:
 	default:
 		break;
 	}
+	if (isalnum((unsigned char)p[*pos - 1])) {
+		mandoc_vmsg(MANDOCERR_FT_BAD, tbl->parse,
+		    ln, *pos - 1, "TS f%c", p[*pos - 1]);
+		goto mod;
+	}
 
 	mandoc_msg(MANDOCERR_TBLLAYOUT, tbl->parse,
 	    ln, *pos - 1, NULL);