Stoopid script failure

[Patrick O'Callaghan]

Can anyone explain why this doesn't work? I've been writing shell
scripts on and off for several decades and I can't see what's going on
here. Is senility setting it?

$ cat > tst
#!/bin/sh
echo foo
$ chmod +x tst
$ ls -l tst
-rwxrwxr-x 1 poc poc 19 2010-02-06 10:22 tst
$ type tst
tst is ./tst
$ tst
bash: ./tst: Permission denied

(SElinux is off, if it matters).

poc