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| author | Mark Simulacrum <mark.simulacrum@gmail.com> | 2017-05-31 10:52:45 -0600 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2017-05-31 10:52:45 -0600 |
| commit | b851d1cdb47b5961a4b37b0645232a18e122663f (patch) | |
| tree | 82d2b94279f3e0b9e33925389f06f53a33b7693c /src/test | |
| parent | d5a7fd585fd3f0e98c99db74cf5071efdbd1a59a (diff) | |
| parent | c2f7e945526bff3b7d812137d81b235263060ee8 (diff) | |
| download | rust-b851d1cdb47b5961a4b37b0645232a18e122663f.tar.gz rust-b851d1cdb47b5961a4b37b0645232a18e122663f.zip | |
Rollup merge of #42196 - tommyip:explain_closure_err, r=nikomatsakis
Explain why a closure is `FnOnce` in closure errors. Issue: #42065 @nikomatsakis Am I going the right direction with this? ~~I am stuck in a few bits:~~ ~~1. How to trace the code to get the upvar instead of the original variable's span?~~ ~~2. How to find the node id of the upvar where the move occured?~~
Diffstat (limited to 'src/test')
| -rw-r--r-- | src/test/ui/fn_once-moved.rs | 3 | ||||
| -rw-r--r-- | src/test/ui/fn_once-moved.stderr | 6 |
2 files changed, 7 insertions, 2 deletions
diff --git a/src/test/ui/fn_once-moved.rs b/src/test/ui/fn_once-moved.rs index 781d3885eae..409964082f2 100644 --- a/src/test/ui/fn_once-moved.rs +++ b/src/test/ui/fn_once-moved.rs @@ -20,5 +20,6 @@ fn main() { debug_dump_dict(); debug_dump_dict(); //~^ ERROR use of moved value: `debug_dump_dict` - //~| NOTE closure was moved because it only implements `FnOnce` + //~| NOTE closure cannot be invoked more than once because it moves the + //~| variable `dict` out of its environment } diff --git a/src/test/ui/fn_once-moved.stderr b/src/test/ui/fn_once-moved.stderr index 91c89e55c54..27b7d91d1d4 100644 --- a/src/test/ui/fn_once-moved.stderr +++ b/src/test/ui/fn_once-moved.stderr @@ -6,7 +6,11 @@ error[E0382]: use of moved value: `debug_dump_dict` 21 | debug_dump_dict(); | ^^^^^^^^^^^^^^^ value used here after move | - = help: closure was moved because it only implements `FnOnce` +note: closure cannot be invoked more than once because it moves the variable `dict` out of its environment + --> $DIR/fn_once-moved.rs:16:29 + | +16 | for (key, value) in dict { + | ^^^^ error: aborting due to previous error(s) |