We can't call `@frameAddress()` and then immediately `return`! That
invalidates the frame. This *usually* isn't a problem, because the stack
walk `next` call will *probably* have a stack frame and it will
*probably* be at the exact same address, but neither of those is a
guarantee. On powerpc, presumably some unfortunate inlining was going
on, so this frame was indeed invalidated when we started walking frames.

We need to explicitly pass `@frameAddress` into any function which will
return before we actually walk the stack. Pretty simple patch.

Resolves: #24970