Add FAQ for NLL migration

[rust.git] / src / test / ui / empty / empty-never-array.stderr

diff --git a/src/test/ui/empty/empty-never-array.stderr b/src/test/ui/empty/empty-never-array.stderr
index f1be4a6edec5f51a714e9756586625d59c920769..9911dd4683b6664a69b47d9e7b3a85fb6eb96194 100644 (file)
--- a/src/test/ui/empty/empty-never-array.stderr
+++ b/src/test/ui/empty/empty-never-array.stderr
@@ -11,6 +11,17 @@ LL | | }
 LL |       let Helper::U(u) = Helper::T(t, []);
    |           ^^^^^^^^^^^^ pattern `T(_, _)` not covered
 
+warning[E0381]: use of possibly uninitialized variable: `u`
+  --> $DIR/empty-never-array.rs:12:5
+   |
+LL |     u
+   |     ^ use of possibly uninitialized `u`
+   |
+   = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
+   = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
+   = note: for more information, try `rustc --explain E0729`
+
 error: aborting due to previous error
 
-For more information about this error, try `rustc --explain E0005`.
+Some errors have detailed explanations: E0005, E0381.
+For more information about an error, try `rustc --explain E0005`.