I found a bug. If you bind any Ctrl prefixed combination to help and press any unbound key, km_error_key() prints just "Key is not bound."
For example, after defining this: :bind index \Ch help :bind index l noop If in the index you press 'l' you have the following message: Key is not bound. When it should print: Key is not bound. Press '^H' for help. Doing the same in the pager produces and infinite loop. Something alike the described here: https://marc.info/?l=mutt-dev&m=146365169501329&w=2 but this time with Control prefixed bindings. I tried to investigate the cause but my level of C doesn't help. The problem is in these lines of km_error_key() on keymap.c: /* make sure the key is really the help key in this menu */ tokenize_unget_string (buf); if (km_dokey (menu) != OP_HELP) { mutt_error _("Key is not bound."); return; } I'm not able to understand what this check do and why, the fact is if I compile mutt without these lines the problem is gone and all works as expected (is really useful that check?). Guessing from my bare intuition, the functions tokenize_unget_string() and km_dokey() aren't able to parse Ctrl prefixed bindings.
