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Diffstat (limited to 'tests/ui/regions/regions-variance-invariant-use-contravariant.stderr')
| -rw-r--r-- | tests/ui/regions/regions-variance-invariant-use-contravariant.stderr | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/tests/ui/regions/regions-variance-invariant-use-contravariant.stderr b/tests/ui/regions/regions-variance-invariant-use-contravariant.stderr new file mode 100644 index 000000000..b35a2cb90 --- /dev/null +++ b/tests/ui/regions/regions-variance-invariant-use-contravariant.stderr @@ -0,0 +1,18 @@ +error: lifetime may not live long enough + --> $DIR/regions-variance-invariant-use-contravariant.rs:20:12 + | +LL | fn use_<'short,'long>(c: Invariant<'long>, + | ------ ----- lifetime `'long` defined here + | | + | lifetime `'short` defined here +... +LL | let _: Invariant<'short> = c; + | ^^^^^^^^^^^^^^^^^ type annotation requires that `'short` must outlive `'long` + | + = help: consider adding the following bound: `'short: 'long` + = note: requirement occurs because of the type `Invariant<'_>`, which makes the generic argument `'_` invariant + = note: the struct `Invariant<'a>` is invariant over the parameter `'a` + = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance + +error: aborting due to previous error + |