Dear all,

I've committed the attached simple & obvious patch for an ICE due to
an invalid read in frontend optimization after regtesting and an OK
by Jerry in the PR.

Pushed: https://gcc.gnu.org/g:3be2b8f475f22c531d6cef1b041c0573b3ea5133

As this PR is marked as a regression, I plan to backport to open
branches.

Thanks,
Harald