diff options
| -rw-r--r-- | src/test/ui/unsized/param-mentioned-by-different-field.rs | 10 | ||||
| -rw-r--r-- | src/test/ui/unsized/param-mentioned-by-different-field.stderr | 14 |
2 files changed, 24 insertions, 0 deletions
diff --git a/src/test/ui/unsized/param-mentioned-by-different-field.rs b/src/test/ui/unsized/param-mentioned-by-different-field.rs new file mode 100644 index 00000000000..cda94b306d3 --- /dev/null +++ b/src/test/ui/unsized/param-mentioned-by-different-field.rs @@ -0,0 +1,10 @@ +// We must not allow this with our current setup as `T` +// is mentioned both in the tail of `Foo` and by another +// field. +struct Foo<T: ?Sized>(Box<T>, T); + +fn main() { + let x: Foo<[u8; 1]> = Foo(Box::new([2]), [3]); + let y: &Foo<[u8]> = &x; //~ ERROR mismatched types + assert_eq!(y.0.len(), 1); +} diff --git a/src/test/ui/unsized/param-mentioned-by-different-field.stderr b/src/test/ui/unsized/param-mentioned-by-different-field.stderr new file mode 100644 index 00000000000..d18fa6456f3 --- /dev/null +++ b/src/test/ui/unsized/param-mentioned-by-different-field.stderr @@ -0,0 +1,14 @@ +error[E0308]: mismatched types + --> $DIR/param-mentioned-by-different-field.rs:8:25 + | +LL | let y: &Foo<[u8]> = &x; + | ---------- ^^ expected slice `[u8]`, found array `[u8; 1]` + | | + | expected due to this + | + = note: expected reference `&Foo<[u8]>` + found reference `&Foo<[u8; 1]>` + +error: aborting due to previous error + +For more information about this error, try `rustc --explain E0308`. |