fix Issue 23056 - importC: dmd asserts for missing return statement i…

[WalterBright]

…n CTFE function

[dlang-bot]

Thanks for your pull request, @WalterBright!

Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	23056	minor	importC: dmd asserts for missing return statement in CTFE function

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#14043"

[ibuclaw]

@WalterBright please target stable for these bug fixes.

[WalterBright]

@ibuclaw I'm not so sure that's a good idea. This is new development, not regressions.

[thewilsonator]

ICEs always go to stable, its not that hard.

[WalterBright]

Many of our rules are in conflict.

[ibuclaw]

It is especially important because we are cutting a new release in a couple weeks. This fix won't be in the 2.100 release because we've already merged master into stable last week, and won't do so again for another 2 months.

And as @thewilsonator says, if you can crash the compiler with some code, that is all the more reason to get it into the upcoming release.