read + SIGWINCH - strange error

[Antonio Macchi]

If I run this script in xterm, and I maximize (not resize) the window, 
I'll get (nearly always) a very strange error... something like

./test: line 17: wait_for: No record of process 22659
but if I use 'read' without timing or with a very long time ( -t10 ) the 
error does not raise.


-------

#!/bin/bash

trap trapfunc SIGWINCH

trapfunc ()  {
  for i in {1..1000}; do
    tput cup 0 0
    echo OK
  done
}


clear
echo maximize your window
while true; do
  read -sn1 -t1
done

------