[Bug libfortran/69651] Usage of unitialized pointer io/list_read.c

[kyukhin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69651

--- Comment #4 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
Created attachment 37628
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37628&action=edit
Reproducer input