Merging upstream version 1.72.1+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

3 files changed, 108 insertions, 0 deletions

diff --git a/tests/ui/for/issue-20605.current.stderr b/tests/ui/for/issue-20605.current.stderr
new file mode 100644
index 000000000..b9a53cbd4
--- /dev/null
+++ b/tests/ui/for/issue-20605.current.stderr
@@ -0,0 +1,16 @@
+error[E0277]: the size for values of type `dyn Iterator<Item = &'a mut u8>` cannot be known at compilation time
+  --> $DIR/issue-20605.rs:5:17
+   |
+LL |     for item in *things { *item = 0 }
+   |                 ^^^^^^^ the trait `IntoIterator` is not implemented for `dyn Iterator<Item = &'a mut u8>`
+   |
+   = note: the trait bound `dyn Iterator<Item = &'a mut u8>: IntoIterator` is not satisfied
+   = note: required for `dyn Iterator<Item = &'a mut u8>` to implement `IntoIterator`
+help: consider mutably borrowing here
+   |
+LL |     for item in &mut *things { *item = 0 }
+   |                 ++++
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0277`.
diff --git a/tests/ui/for/issue-20605.next.stderr b/tests/ui/for/issue-20605.next.stderr
new file mode 100644
index 000000000..d55efedfc
--- /dev/null
+++ b/tests/ui/for/issue-20605.next.stderr
@@ -0,0 +1,72 @@
+error[E0277]: the trait bound `dyn Iterator<Item = &'a mut u8>: IntoIterator` is not satisfied
+  --> $DIR/issue-20605.rs:5:17
+   |
+LL |     for item in *things { *item = 0 }
+   |                 ^^^^^^^ the trait `IntoIterator` is not implemented for `dyn Iterator<Item = &'a mut u8>`
+
+error[E0277]: the size for values of type `<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter` cannot be known at compilation time
+  --> $DIR/issue-20605.rs:5:17
+   |
+LL |     for item in *things { *item = 0 }
+   |                 ^^^^^^^ doesn't have a size known at compile-time
+   |
+   = help: the trait `Sized` is not implemented for `<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter`
+   = note: all local variables must have a statically known size
+   = help: unsized locals are gated as an unstable feature
+
+error: the type `<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter` is not well-formed
+  --> $DIR/issue-20605.rs:5:17
+   |
+LL |     for item in *things { *item = 0 }
+   |                 ^^^^^^^
+
+error[E0277]: `<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter` is not an iterator
+  --> $DIR/issue-20605.rs:5:17
+   |
+LL |     for item in *things { *item = 0 }
+   |                 ^^^^^^^ `<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter` is not an iterator
+   |
+   = help: the trait `Iterator` is not implemented for `<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter`
+
+error: the type `&mut <dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter` is not well-formed
+  --> $DIR/issue-20605.rs:5:17
+   |
+LL |     for item in *things { *item = 0 }
+   |                 ^^^^^^^
+
+error[E0614]: type `<<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter as Iterator>::Item` cannot be dereferenced
+  --> $DIR/issue-20605.rs:5:27
+   |
+LL |     for item in *things { *item = 0 }
+   |                           ^^^^^
+
+error[E0277]: the size for values of type `<<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter as Iterator>::Item` cannot be known at compilation time
+  --> $DIR/issue-20605.rs:5:9
+   |
+LL |     for item in *things { *item = 0 }
+   |         ^^^^ doesn't have a size known at compile-time
+   |
+   = help: the trait `Sized` is not implemented for `<<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter as Iterator>::Item`
+   = note: all local variables must have a statically known size
+   = help: unsized locals are gated as an unstable feature
+
+error: the type `Option<<<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter as Iterator>::Item>` is not well-formed
+  --> $DIR/issue-20605.rs:5:17
+   |
+LL |     for item in *things { *item = 0 }
+   |                 ^^^^^^^
+
+error[E0277]: the size for values of type `<<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter as Iterator>::Item` cannot be known at compilation time
+  --> $DIR/issue-20605.rs:5:5
+   |
+LL |     for item in *things { *item = 0 }
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
+   |
+   = help: the trait `Sized` is not implemented for `<<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter as Iterator>::Item`
+note: required by a bound in `None`
+  --> $SRC_DIR/core/src/option.rs:LL:COL
+
+error: aborting due to 9 previous errors
+
+Some errors have detailed explanations: E0277, E0614.
+For more information about an error, try `rustc --explain E0277`.
diff --git a/tests/ui/for/issue-20605.rs b/tests/ui/for/issue-20605.rs
new file mode 100644
index 000000000..50d4c3fdd
--- /dev/null
+++ b/tests/ui/for/issue-20605.rs
@@ -0,0 +1,20 @@
+// revisions: current next
+//[next] compile-flags: -Ztrait-solver=next
+
+fn changer<'a>(mut things: Box<dyn Iterator<Item=&'a mut u8>>) {
+    for item in *things { *item = 0 }
+    //[current]~^ ERROR the size for values of type
+    //[next]~^^ ERROR the trait bound `dyn Iterator<Item = &'a mut u8>: IntoIterator` is not satisfied
+    //[next]~| ERROR the size for values of type `<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter` cannot be known at compilation time
+    //[next]~| ERROR the type `<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter` is not well-formed
+    //[next]~| ERROR `<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter` is not an iterator
+    //[next]~| ERROR the type `&mut <dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter` is not well-formed
+    //[next]~| ERROR the size for values of type `<<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter as Iterator>::Item` cannot be known at compilation time
+    //[next]~| ERROR the type `Option<<<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter as Iterator>::Item>` is not well-formed
+    //[next]~| ERROR the size for values of type `<<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter as Iterator>::Item` cannot be known at compilation time
+    //[next]~| ERROR type `<<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter as Iterator>::Item` cannot be dereferenced
+    // FIXME(-Ztrait-solver=next): these error messages are horrible and have to be
+    // improved before we stabilize the new solver.
+}
+
+fn main() {}