bless a few trivial tests under polonius

These are all about reaching some type and recursion limits and saving
the full type in a file, whose folder changes in this compare-mode.

Author: lqd

src/test/ui/infinite/infinite-instantiation.polonius.stderr

@@ -0,0 +1,15 @@
+error: reached the recursion limit while instantiating `function::<Option<Option<Option<...>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+  --> $DIR/infinite-instantiation.rs:22:9
+   |
+LL |         function(counter - 1, t.to_option());
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+note: `function` defined here
+  --> $DIR/infinite-instantiation.rs:20:1
+   |
+LL | fn function<T:ToOpt + Clone>(counter: usize, t: T) {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   = note: the full type name has been written to '$TEST_BUILD_DIR/infinite/infinite-instantiation.polonius/infinite-instantiation.long-type.txt'
+
+error: aborting due to previous error
+

src/test/ui/issues/issue-22638.polonius.stderr

@@ -0,0 +1,15 @@
+error: reached the recursion limit while instantiating `A::matches::$CLOSURE`
+  --> $DIR/issue-22638.rs:56:9
+   |
+LL |         a.matches(f)
+   |         ^^^^^^^^^^^^
+   |
+note: `A::matches` defined here
+  --> $DIR/issue-22638.rs:15:5
+   |
+LL |     pub fn matches<F: Fn()>(&self, f: &F) {
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   = note: the full type name has been written to '$TEST_BUILD_DIR/issues/issue-22638.polonius/issue-22638.long-type.txt'
+
+error: aborting due to previous error
+

src/test/ui/issues/issue-37311-type-length-limit/issue-37311.polonius.stderr

@@ -0,0 +1,15 @@
+error: reached the recursion limit while instantiating `<(&(&(&(&(&(&(&(&(&(&(&(&(&(&(&(.....), ...), ...) as Foo>::recurse`
+  --> $DIR/issue-37311.rs:17:9
+   |
+LL |         (self, self).recurse();
+   |         ^^^^^^^^^^^^^^^^^^^^^^
+   |
+note: `<T as Foo>::recurse` defined here
+  --> $DIR/issue-37311.rs:16:5
+   |
+LL |     fn recurse(&self) {
+   |     ^^^^^^^^^^^^^^^^^
+   = note: the full type name has been written to '$TEST_BUILD_DIR/issues/issue-37311-type-length-limit/issue-37311.polonius/issue-37311.long-type.txt'
+
+error: aborting due to previous error
+

src/test/ui/issues/issue-67552.polonius.stderr

@@ -0,0 +1,17 @@
+error: reached the recursion limit while instantiating `rec::<&mut &mut &mut &mut &mut &... &mut &mut &mut &mut &mut Empty>`
+  --> $DIR/issue-67552.rs:28:9
+   |
+LL |         rec(identity(&mut it))
+   |         ^^^^^^^^^^^^^^^^^^^^^^
+   |
+note: `rec` defined here
+  --> $DIR/issue-67552.rs:21:1
+   |
+LL | / fn rec<T>(mut it: T)
+LL | | where
+LL | |     T: Iterator,
+   | |________________^
+   = note: the full type name has been written to '$TEST_BUILD_DIR/issues/issue-67552.polonius/issue-67552.long-type.txt'
+
+error: aborting due to previous error
+

src/test/ui/issues/issue-8727.polonius.stderr

@@ -0,0 +1,26 @@
+warning: function cannot return without recursing
+  --> $DIR/issue-8727.rs:7:1
+   |
+LL | fn generic<T>() {
+   | ^^^^^^^^^^^^^^^ cannot return without recursing
+LL |     generic::<Option<T>>();
+   |     ---------------------- recursive call site
+   |
+   = note: `#[warn(unconditional_recursion)]` on by default
+   = help: a `loop` may express intention better if this is on purpose
+
+error: reached the recursion limit while instantiating `generic::<Option<Option<Option<O...>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+  --> $DIR/issue-8727.rs:8:5
+   |
+LL |     generic::<Option<T>>();
+   |     ^^^^^^^^^^^^^^^^^^^^^^
+   |
+note: `generic` defined here
+  --> $DIR/issue-8727.rs:7:1
+   |
+LL | fn generic<T>() {
+   | ^^^^^^^^^^^^^^^
+   = note: the full type name has been written to '$TEST_BUILD_DIR/issues/issue-8727.polonius/issue-8727.long-type.txt'
+
+error: aborting due to previous error; 1 warning emitted
+

src/test/ui/recursion/issue-38591-non-regular-dropck-recursion.polonius.stderr

@@ -0,0 +1,15 @@
+error: reached the recursion limit while instantiating `std::ptr::drop_in_place::<S<fn(f...)))))))))))))))))))))))))))))>))`
+  --> $SRC_DIR/core/src/ptr/mod.rs:LL:COL
+   |
+LL | pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+note: `std::ptr::drop_in_place` defined here
+  --> $SRC_DIR/core/src/ptr/mod.rs:LL:COL
+   |
+LL | pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   = note: the full type name has been written to '$TEST_BUILD_DIR/recursion/issue-38591-non-regular-dropck-recursion.polonius/issue-38591-non-regular-dropck-recursion.long-type.txt'
+
+error: aborting due to previous error
+

src/test/ui/recursion/recursion.polonius.stderr

@@ -0,0 +1,15 @@
+error: reached the recursion limit while instantiating `test::<Cons<Cons<Cons<Cons<Cons<...>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+  --> $DIR/recursion.rs:18:11
+   |
+LL |     _ => {test (n-1, i+1, Cons {head:2*i+1, tail:first}, Cons{head:i*i, tail:second})}
+   |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+note: `test` defined here
+  --> $DIR/recursion.rs:16:1
+   |
+LL | fn test<T:Dot> (n:isize, i:isize, first:T, second:T) ->isize {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   = note: the full type name has been written to '$TEST_BUILD_DIR/recursion/recursion.polonius/recursion.long-type.txt'
+
+error: aborting due to previous error
+

src/test/ui/type_length_limit.polonius.stderr

@@ -0,0 +1,11 @@
+error: reached the type-length limit while instantiating `std::mem::drop::<Option<((((...,....., ...), ..., ...), ..., ...)>>`
+  --> $SRC_DIR/core/src/mem/mod.rs:LL:COL
+   |
+LL | pub fn drop<T>(_x: T) {}
+   | ^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: the full type name has been written to '$TEST_BUILD_DIR/type_length_limit.polonius/type_length_limit.long-type.txt'
+   = help: consider adding a `#![type_length_limit="8"]` attribute to your crate
+
+error: aborting due to previous error
+