[Bug c/86667] [7/8/9 Regression] can no longer traverse environment table

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86667

--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The test works as expected if I replace

      *ep=*ep++;

with

      *ep++;

in the C file.