[Ecls-list] *read-suppress* REPL reader "bug"

[Daniel Herring]

Bug in quotes since it appears to be entirely conforming and common, and 
it falls into the "rm -rf /" or "deltree c:" class of stupid.

If at the REPL you type (setf *read-suppress* t),
CLISP: ignored
SBCL: useless REPL
ECL: useless REPL
CCL: useless REPL
...

I couldn't get "useless REPLs" to return anything other than nil.

While dpANS/CLHS don't seem to say anything about this, I believe CLISP 
has the right idea.  The REPL should (lexically) ensure *read-suppress* is 
bound to nil before reading user input.

- Daniel

P.S. I BCC'd this message to sbcl-devel, ecls-list, and openmcl-devel to 
avoid automatic cross-posting of replies.  Other implementations may also 
be affected.