fix Issue 11435 - Pushing indirect ref to byte or short can read beyo…

[WalterBright]

…nd edge of valid memory

Hard to write a reliable test case for this.

[dlang-bot]

Thanks for your pull request, @WalterBright!

Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	11435	critical	Pushing indirect ref to byte or short can read beyond edge of valid memory

⚠️⚠️⚠️ Warnings ⚠️⚠️⚠️

• Regression or critical bug fixes should always target the stable branch. Learn more about rebasing to stable or the D release process.

To target stable perform these two steps:

1. Rebase your branch to upstream/stable:

git rebase --onto upstream/stable upstream/master

2. Change the base branch of your PR to stable

Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub run digger -- build "master + dmd#11933"

[WalterBright]

Grabbed test case from @yebblies 's #3806