diff options
Diffstat (limited to 'tests/ui/closures/2229_closure_analysis')
6 files changed, 117 insertions, 0 deletions
diff --git a/tests/ui/closures/2229_closure_analysis/array_subslice.rs b/tests/ui/closures/2229_closure_analysis/array_subslice.rs new file mode 100644 index 000000000..5f244ea89 --- /dev/null +++ b/tests/ui/closures/2229_closure_analysis/array_subslice.rs @@ -0,0 +1,13 @@ +// regression test for #109298 +// edition: 2021 + +pub fn subslice_array(x: [u8; 3]) { + let f = || { + let [_x @ ..] = x; + let [ref y, ref mut z @ ..] = x; //~ ERROR cannot borrow `x[..]` as mutable + }; + + f(); //~ ERROR cannot borrow `f` as mutable +} + +fn main() {} diff --git a/tests/ui/closures/2229_closure_analysis/array_subslice.stderr b/tests/ui/closures/2229_closure_analysis/array_subslice.stderr new file mode 100644 index 000000000..888c60d5e --- /dev/null +++ b/tests/ui/closures/2229_closure_analysis/array_subslice.stderr @@ -0,0 +1,26 @@ +error[E0596]: cannot borrow `x[..]` as mutable, as `x` is not declared as mutable + --> $DIR/array_subslice.rs:7:21 + | +LL | pub fn subslice_array(x: [u8; 3]) { + | - help: consider changing this to be mutable: `mut x` +... +LL | let [ref y, ref mut z @ ..] = x; + | ^^^^^^^^^ cannot borrow as mutable + +error[E0596]: cannot borrow `f` as mutable, as it is not declared as mutable + --> $DIR/array_subslice.rs:10:5 + | +LL | let [ref y, ref mut z @ ..] = x; + | - calling `f` requires mutable binding due to mutable borrow of `x` +... +LL | f(); + | ^ cannot borrow as mutable + | +help: consider changing this to be mutable + | +LL | let mut f = || { + | +++ + +error: aborting due to 2 previous errors + +For more information about this error, try `rustc --explain E0596`. diff --git a/tests/ui/closures/2229_closure_analysis/unique-borrows-are-invariant-1.rs b/tests/ui/closures/2229_closure_analysis/unique-borrows-are-invariant-1.rs new file mode 100644 index 000000000..f21ef43fb --- /dev/null +++ b/tests/ui/closures/2229_closure_analysis/unique-borrows-are-invariant-1.rs @@ -0,0 +1,18 @@ +// edition:2021 + +// regression test for #112056 + +fn extend_lifetime<'a, 'b>(x: &mut (&'a str,), y: &'b str) { + let mut closure = |input| x.0 = input; + //~^ ERROR: lifetime may not live long enough + closure(y); +} + +fn main() { + let mut tuple = ("static",); + { + let x = String::from("temporary"); + extend_lifetime(&mut tuple, &x); + } + println!("{}", tuple.0); +} diff --git a/tests/ui/closures/2229_closure_analysis/unique-borrows-are-invariant-1.stderr b/tests/ui/closures/2229_closure_analysis/unique-borrows-are-invariant-1.stderr new file mode 100644 index 000000000..730823281 --- /dev/null +++ b/tests/ui/closures/2229_closure_analysis/unique-borrows-are-invariant-1.stderr @@ -0,0 +1,14 @@ +error: lifetime may not live long enough + --> $DIR/unique-borrows-are-invariant-1.rs:6:31 + | +LL | fn extend_lifetime<'a, 'b>(x: &mut (&'a str,), y: &'b str) { + | -- -- lifetime `'b` defined here + | | + | lifetime `'a` defined here +LL | let mut closure = |input| x.0 = input; + | ^^^^^^^^^^^ assignment requires that `'b` must outlive `'a` + | + = help: consider adding the following bound: `'b: 'a` + +error: aborting due to previous error + diff --git a/tests/ui/closures/2229_closure_analysis/unique-borrows-are-invariant-2.rs b/tests/ui/closures/2229_closure_analysis/unique-borrows-are-invariant-2.rs new file mode 100644 index 000000000..dd9d986c2 --- /dev/null +++ b/tests/ui/closures/2229_closure_analysis/unique-borrows-are-invariant-2.rs @@ -0,0 +1,31 @@ +// edition:2021 + +// regression test for #112056 + +struct Spooky<'b> { + owned: Option<&'static u32>, + borrowed: &'b &'static u32, +} + +impl<'b> Spooky<'b> { + fn create_self_reference<'a>(&'a mut self) { + let mut closure = || { + if let Some(owned) = &self.owned { + let borrow: &'a &'static u32 = owned; + self.borrowed = borrow; + //~^ ERROR: lifetime may not live long enough + } + }; + closure(); + } +} + +fn main() { + let mut spooky: Spooky<'static> = Spooky { + owned: Some(&1), + borrowed: &&1, + }; + spooky.create_self_reference(); + spooky.owned = None; + println!("{}", **spooky.borrowed); +} diff --git a/tests/ui/closures/2229_closure_analysis/unique-borrows-are-invariant-2.stderr b/tests/ui/closures/2229_closure_analysis/unique-borrows-are-invariant-2.stderr new file mode 100644 index 000000000..66ba0fe35 --- /dev/null +++ b/tests/ui/closures/2229_closure_analysis/unique-borrows-are-invariant-2.stderr @@ -0,0 +1,15 @@ +error: lifetime may not live long enough + --> $DIR/unique-borrows-are-invariant-2.rs:15:17 + | +LL | impl<'b> Spooky<'b> { + | -- lifetime `'b` defined here +LL | fn create_self_reference<'a>(&'a mut self) { + | -- lifetime `'a` defined here +... +LL | self.borrowed = borrow; + | ^^^^^^^^^^^^^^^^^^^^^^ assignment requires that `'a` must outlive `'b` + | + = help: consider adding the following bound: `'a: 'b` + +error: aborting due to previous error + |