segfault when converting local indexed to associative array

[Grisha Levit]

$ echo $BASH_VERSION
4.4.23(1)-release
$ f() { declare -a a; declare -A a; declare -p a; }; f
bash: declare: a: cannot convert indexed to associative array
declare -aA a
Segmentation fault: 11

This behavior is still present in the devel branch.