From 50c1c295ee730fa5fbc3baf4b57ceceedfbb20f2 Mon Sep 17 00:00:00 2001 From: Jonas Schievink Date: Sun, 15 Mar 2020 00:24:47 +0100 Subject: Make `needs_drop` less pessimistic on generators --- src/test/ui/generator/borrowing.stderr | 15 ++++++--------- src/test/ui/generator/retain-resume-ref.stderr | 7 +++---- 2 files changed, 9 insertions(+), 13 deletions(-) (limited to 'src/test') diff --git a/src/test/ui/generator/borrowing.stderr b/src/test/ui/generator/borrowing.stderr index 83987e19839..38e1ace8c4e 100644 --- a/src/test/ui/generator/borrowing.stderr +++ b/src/test/ui/generator/borrowing.stderr @@ -1,19 +1,16 @@ error[E0597]: `a` does not live long enough --> $DIR/borrowing.rs:9:33 | +LL | let _b = { + | -- borrow later stored here +LL | let a = 3; LL | Pin::new(&mut || yield &a).resume(()) - | ----------^ - | | | - | | borrowed value does not live long enough + | -- ^ borrowed value does not live long enough + | | | value captured here by generator - | a temporary with access to the borrow is created here ... LL | LL | }; - | -- ... and the borrow might be used here, when that temporary is dropped and runs the destructor for generator - | | - | `a` dropped here while still borrowed - | - = note: The temporary is part of an expression at the end of a block. Consider forcing this temporary to be dropped sooner, before the block's local variables are dropped. For example, you could save the expression's value in a new local variable `x` and then make `x` be the expression at the end of the block. + | - `a` dropped here while still borrowed error[E0597]: `a` does not live long enough --> $DIR/borrowing.rs:16:20 diff --git a/src/test/ui/generator/retain-resume-ref.stderr b/src/test/ui/generator/retain-resume-ref.stderr index bc715c7030e..e33310d12d9 100644 --- a/src/test/ui/generator/retain-resume-ref.stderr +++ b/src/test/ui/generator/retain-resume-ref.stderr @@ -4,10 +4,9 @@ error[E0499]: cannot borrow `thing` as mutable more than once at a time LL | gen.as_mut().resume(&mut thing); | ---------- first mutable borrow occurs here LL | gen.as_mut().resume(&mut thing); - | ^^^^^^^^^^ second mutable borrow occurs here -LL | -LL | } - | - first borrow might be used here, when `gen` is dropped and runs the destructor for generator + | ------ ^^^^^^^^^^ second mutable borrow occurs here + | | + | first borrow later used by call error: aborting due to previous error -- cgit 1.4.1-3-g733a5