Following up
https://mailman.research.att.com/pipermail/ast-developers/2011q3/000937.html
I have just been bitten by this bug. I was able to boil down the
failure case to this:
$ cat u
#!/bin/ksh
function g { IFS=" " ; }
function f { typeset IFS ; : $(g) ; }
f
f
$ ./u
Segmentation fault
$ ksh --version
version sh (AT&T Research) 93u 2011-02-08
--
Thomas Hood
RAAF Technology
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