Rollup merge of #79158 - lcnr:lazy-norm-coerce, r=oli-obk

type is too big -> values of the type are too big

strictly speaking, `[u8; usize::MAX]` or even `[[[u128; usize::MAX]; usize::MAX]; usize::MAX]` are absolutely fine types as long as you don't try to deal with any values of it.

This error message seems to cause some confusion imo, for example in https://github.com/rust-lang/rust/pull/79135#issuecomment-729361380 so I would prefer us to be more precise here.

See the added test case which uses one of these types without causing an error.

r? ``@oli-obk``

compiler/rustc_middle/src/ty/layout.rs

@@ -176,7 +176,7 @@ impl<'tcx> fmt::Display for LayoutError<'tcx> {
         match *self {
             LayoutError::Unknown(ty) => write!(f, "the type `{}` has an unknown layout", ty),
             LayoutError::SizeOverflow(ty) => {
-                write!(f, "the type `{}` is too big for the current architecture", ty)
+                write!(f, "values of the type `{}` are too big for the current architecture", ty)
             }
         }
     }