1 files changed, 69 insertions, 0 deletions
diff --git a/tests/ui/suggestions/suggest-tryinto-edition-change.stderr b/tests/ui/suggestions/suggest-tryinto-edition-change.stderr
new file mode 100644
index 000000000..018083f9e
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+++ b/tests/ui/suggestions/suggest-tryinto-edition-change.stderr
@@ -0,0 +1,69 @@
+error[E0433]: failed to resolve: use of undeclared type `TryFrom`
+  --> $DIR/suggest-tryinto-edition-change.rs:11:19
+   |
+LL |     let _i: i16 = TryFrom::try_from(0_i32).unwrap();
+   |                   ^^^^^^^ use of undeclared type `TryFrom`
+   |
+   = note: 'std::convert::TryFrom' is included in the prelude starting in Edition 2021
+   = note: 'core::convert::TryFrom' is included in the prelude starting in Edition 2021
+help: consider importing one of these items
+   |
+LL | use core::convert::TryFrom;
+   |
+LL | use std::convert::TryFrom;
+   |
+
+error[E0433]: failed to resolve: use of undeclared type `TryInto`
+  --> $DIR/suggest-tryinto-edition-change.rs:17:19
+   |
+LL |     let _i: i16 = TryInto::try_into(0_i32).unwrap();
+   |                   ^^^^^^^ use of undeclared type `TryInto`
+   |
+   = note: 'std::convert::TryInto' is included in the prelude starting in Edition 2021
+   = note: 'core::convert::TryInto' is included in the prelude starting in Edition 2021
+help: consider importing one of these items
+   |
+LL | use core::convert::TryInto;
+   |
+LL | use std::convert::TryInto;
+   |
+
+error[E0433]: failed to resolve: use of undeclared type `FromIterator`
+  --> $DIR/suggest-tryinto-edition-change.rs:23:22
+   |
+LL |     let _v: Vec<_> = FromIterator::from_iter(&[1]);
+   |                      ^^^^^^^^^^^^ use of undeclared type `FromIterator`
+   |
+   = note: 'std::iter::FromIterator' is included in the prelude starting in Edition 2021
+   = note: 'core::iter::FromIterator' is included in the prelude starting in Edition 2021
+help: a trait with a similar name exists
+   |
+LL |     let _v: Vec<_> = IntoIterator::from_iter(&[1]);
+   |                      ~~~~~~~~~~~~
+help: consider importing one of these items
+   |
+LL | use core::iter::FromIterator;
+   |
+LL | use std::iter::FromIterator;
+   |
+
+error[E0599]: no method named `try_into` found for type `i32` in the current scope
+  --> $DIR/suggest-tryinto-edition-change.rs:6:25
+   |
+LL |     let _i: i16 = 0_i32.try_into().unwrap();
+   |                         ^^^^^^^^ method not found in `i32`
+  --> $SRC_DIR/core/src/convert/mod.rs:LL:COL
+   |
+   = note: the method is available for `i32` here
+   |
+   = help: items from traits can only be used if the trait is in scope
+   = note: 'std::convert::TryInto' is included in the prelude starting in Edition 2021
+help: the following trait is implemented but not in scope; perhaps add a `use` for it:
+   |
+LL | use std::convert::TryInto;
+   |
+
+error: aborting due to 4 previous errors
+
+Some errors have detailed explanations: E0433, E0599.
+For more information about an error, try `rustc --explain E0433`.