⎕SR not returning valid terminating keystroke

[David Lamkins]

Dyalog APL/S Version 13.1.14064
Unicode Edition

Here's what I'm seeing:

      ⎕SM←'stuff' 2 3 ⋄ ⎕sr 1                                                   
1 1 1    0 0

Note that ⎕SR[4] is always empty. I expect to see one of 'ER', 'EP' or 'QT' depending upon which exit key I use.

The same behavior obtains with dyadic ⎕SR, e.g. as in the smdesign workspace (which requires a minor tweak to make it function at all under Linux).

[AndyS|Dyalog]

I've logged this as 008734: Linux only: in optimised builds ⎕sr always returns an empty 4th element and we'll let you know when we have a fix.
It's fine on AIX and Windows (and on the Linux debug versions which we build for in-house use).