===================================================================
RCS file: /cvs/mandoc/TODO,v
retrieving revision 1.304
retrieving revision 1.306
diff -u -p -r1.304 -r1.306
--- mandoc/TODO	2020/06/24 12:09:29	1.304
+++ mandoc/TODO	2020/09/07 14:18:49	1.306
@@ -1,6 +1,6 @@
 ************************************************************************
 * Official mandoc TODO.
-* $Id: TODO,v 1.304 2020/06/24 12:09:29 schwarze Exp $
+* $Id: TODO,v 1.306 2020/09/07 14:18:49 schwarze Exp $
 ************************************************************************
 
 Many issues are annotated for difficulty as follows:
@@ -33,6 +33,21 @@ Obviously, as the issues have not been solved yet, the
 are mere guesses, and some may be wrong.
 
 ************************************************************************
+* assertion failures
+************************************************************************
+
+- .if n .ce in the middle of .TS data
+  afl case f1/id:000103,sig:06,src:009024+009105,op:splice,rep:2 (jes@)
+  While roff_parseln() prevents .ce and similar requests in the middle
+  of a tbl, the guard is no longer effective when the .ce is wrapped
+  in a roff block, for example a conditional.  The resulting assertion
+  has never been seen in any real-world manual page.
+  This is too dangerous to fix before release because it requires
+  reorganizing the very delicate internals of roff_parseln(),
+  which risks causing more severe bugs.
+  loc * exist *** algo *** size * imp *
+
+************************************************************************
 * missing features
 ************************************************************************
 
@@ -99,6 +114,7 @@ are mere guesses, and some may be wrong.
   later handling because they can for example be used in macro names.
   So they may need handling after roff(7) processing.
   pointed out by John Gardner 23 Jun 2020 18:28:08 +1000
+  more info from John Gardner 29 Jun 2020 19:54:04 +1000
   loc **  exist **  algo **  size **  imp *
 
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