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error: function pointer types may not have generic parameters
--> $DIR/issue-107998.rs:3:18
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LL | fn with<R>(f: &fn<'a>(x: &'a i32) -> R) -> R {
| ^^^^
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help: consider moving the lifetime parameter to a `for` parameter list
|
LL - fn with<R>(f: &fn<'a>(x: &'a i32) -> R) -> R {
LL + fn with<R>(f: &for<'a> fn(x: &'a i32) -> R) -> R {
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error: lifetime parameter `'a` only used once
--> $DIR/issue-107998.rs:3:19
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LL | fn with<R>(f: &fn<'a>(x: &'a i32) -> R) -> R {
| ^^ ---
| | |
| | ...is used only here
| | help: elide the single-use lifetime
| this lifetime...
|
note: the lint level is defined here
--> $DIR/issue-107998.rs:1:9
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LL | #![deny(single_use_lifetimes)]
| ^^^^^^^^^^^^^^^^^^^^
error: aborting due to 2 previous errors
|
