Commentary on: Bash Command Leads to ...

First, I am assuming that Martin's analysis/distillation of the OP's issue is correct, and
that this is (simply) an issue of the terminal echo being turned off.

Given that, I would like to point out that tcsh, to its credit, always resets the terminal
to "sane" before prompting for user input.  This is a Good Thing and something that
(IMNSHO), bash should also do.

Note, that (rhetorical) you could (probably, since I have not tested it) implement this
yourself using PROMPT_COMMAND, but, again IMNSHO, it should be built-in.  I can't think of
any argument against it (note that it is only when the shell is about to prompt for a
command - you can still turn echo off in your scripts and so on, if you like).

Also note (mainly for OP's benefit): to recover from this you need to learn the trick of
typing in "stty sane^j" blind.  Note that the line terminator sometimes has to be ^j
(Newline), not the usual ^m (Enter or Carriage Return).  And if you are not comfortable
with this, then sometimes it is easier just to disconnect (close the terminal window) and
log back in.

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