diff options
Diffstat (limited to 'src/test/ui/borrowck/two-phase-reservation-sharing-interference.rs')
-rw-r--r-- | src/test/ui/borrowck/two-phase-reservation-sharing-interference.rs | 45 |
1 files changed, 0 insertions, 45 deletions
diff --git a/src/test/ui/borrowck/two-phase-reservation-sharing-interference.rs b/src/test/ui/borrowck/two-phase-reservation-sharing-interference.rs deleted file mode 100644 index 0463e22b3..000000000 --- a/src/test/ui/borrowck/two-phase-reservation-sharing-interference.rs +++ /dev/null @@ -1,45 +0,0 @@ -// revisions: nll_target - -// The nll_beyond revision is disabled due to missing support from two-phase beyond autorefs -//[nll_beyond]compile-flags: -Z two-phase-beyond-autoref -//[nll_beyond]should-fail - -// This is a corner case that the current implementation is (probably) -// treating more conservatively than is necessary. But it also does -// not seem like a terribly important use case to cover. -// -// So this test is just making a note of the current behavior, with -// the caveat that in the future, the rules may be loosened, at which -// point this test might be thrown out. -// -// The convention for the listed revisions: "lxl" means lexical -// lifetimes (which can be easier to reason about). "nll" means -// non-lexical lifetimes. "nll_target" means the initial conservative -// two-phase borrows that only applies to autoref-introduced borrows. -// "nll_beyond" means the generalization of two-phase borrows to all -// `&mut`-borrows (doing so makes it easier to write code for specific -// corner cases). - -fn main() { - let mut vec = vec![0, 1]; - let delay: &mut Vec<_>; - { - let shared = &vec; - - // we reserve here, which could (on its own) be compatible - // with the shared borrow. But in the current implementation, - // its an error. - delay = &mut vec; - //[nll_beyond]~^ ERROR cannot borrow `vec` as mutable because it is also borrowed as immutable - //[nll_target]~^^ ERROR cannot borrow `vec` as mutable because it is also borrowed as immutable - - shared[0]; - } - - // the &mut-borrow only becomes active way down here. - // - // (At least in theory; part of the reason this test fails is that - // the constructed MIR throws in extra &mut reborrows which - // flummoxes our attempt to delay the activation point here.) - delay.push(2); -} |