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Diffstat (limited to 'tests/ui/variance/variance-cell-is-invariant.stderr')
| -rw-r--r-- | tests/ui/variance/variance-cell-is-invariant.stderr | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/tests/ui/variance/variance-cell-is-invariant.stderr b/tests/ui/variance/variance-cell-is-invariant.stderr new file mode 100644 index 000000000..ab5435d16 --- /dev/null +++ b/tests/ui/variance/variance-cell-is-invariant.stderr @@ -0,0 +1,18 @@ +error: lifetime may not live long enough + --> $DIR/variance-cell-is-invariant.rs:14:12 + | +LL | fn use_<'short,'long>(c: Foo<'short>, + | ------ ----- lifetime `'long` defined here + | | + | lifetime `'short` defined here +... +LL | let _: Foo<'long> = c; + | ^^^^^^^^^^ type annotation requires that `'short` must outlive `'long` + | + = help: consider adding the following bound: `'short: 'long` + = note: requirement occurs because of the type `Foo<'_>`, which makes the generic argument `'_` invariant + = note: the struct `Foo<'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 + |