50 lines
2.7 KiB
Plaintext
50 lines
2.7 KiB
Plaintext
note: external requirements
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--> $DIR/propagate-approximated-shorter-to-static-wrong-bound.rs:35:47
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LL | establish_relationships(&cell_a, &cell_b, |_outlives1, _outlives2, x, y| {
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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= note: defining type: supply::{closure#0} with closure substs [
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i16,
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for<Region(BrAnon(None)), Region(BrAnon(None)), Region(BrAnon(None)), Region(BrAnon(None)), Region(BrAnon(None)), Region(BrAnon(None))> extern "rust-call" fn((&ReLateBound(DebruijnIndex(0), BoundRegion { var: 0, kind: BrAnon(None) }) std::cell::Cell<&'?1 &ReLateBound(DebruijnIndex(0), BoundRegion { var: 1, kind: BrAnon(None) }) u32>, &ReLateBound(DebruijnIndex(0), BoundRegion { var: 2, kind: BrAnon(None) }) std::cell::Cell<&'?2 &ReLateBound(DebruijnIndex(0), BoundRegion { var: 3, kind: BrAnon(None) }) u32>, &ReLateBound(DebruijnIndex(0), BoundRegion { var: 4, kind: BrAnon(None) }) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BoundRegion { var: 1, kind: BrAnon(None) }) u32>, &ReLateBound(DebruijnIndex(0), BoundRegion { var: 5, kind: BrAnon(None) }) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BoundRegion { var: 3, kind: BrAnon(None) }) u32>)),
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(),
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]
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= note: late-bound region is '?3
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= note: late-bound region is '?4
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= note: number of external vids: 5
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= note: where '?1: '?0
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note: no external requirements
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--> $DIR/propagate-approximated-shorter-to-static-wrong-bound.rs:34:1
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LL | fn supply<'a, 'b>(cell_a: Cell<&'a u32>, cell_b: Cell<&'b u32>) {
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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= note: defining type: supply
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error[E0521]: borrowed data escapes outside of function
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--> $DIR/propagate-approximated-shorter-to-static-wrong-bound.rs:35:5
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LL | fn supply<'a, 'b>(cell_a: Cell<&'a u32>, cell_b: Cell<&'b u32>) {
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| -- ------ `cell_a` is a reference that is only valid in the function body
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| |
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| lifetime `'a` defined here
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LL | / establish_relationships(&cell_a, &cell_b, |_outlives1, _outlives2, x, y| {
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LL | |
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LL | |
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LL | | // Only works if 'x: 'y:
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LL | | demand_y(x, y, x.get())
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LL | | });
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| | ^
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| | |
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| |______`cell_a` escapes the function body here
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| argument requires that `'a` must outlive `'static`
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= note: requirement occurs because of the type `Cell<&'?10 u32>`, which makes the generic argument `&'?10 u32` invariant
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= note: the struct `Cell<T>` is invariant over the parameter `T`
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= help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
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error: aborting due to previous error
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For more information about this error, try `rustc --explain E0521`.
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