move crash tests to ui

adwinwhite · adwinwhite · commit a45431710f5d · 2025-09-15T12:09:13.000+08:00
diff --git a/tests/ui/codegen/normalization-overflow/recursion-issue-105275.rs b/tests/ui/codegen/normalization-overflow/recursion-issue-105275.rs
@@ -1,9 +1,10 @@
-//@ known-bug: #105275
+//@ build-fail
 //@ compile-flags: -Copt-level=0
 
 pub fn encode_num<Writer: ExampleWriter>(n: u32, mut writer: Writer) -> Result<(), Writer::Error> {
     if n > 15 {
         encode_num(n / 16, &mut writer)?;
+        //~^ ERROR: reached the recursion limit while instantiating
     }
     Ok(())
 }
diff --git a/tests/ui/codegen/normalization-overflow/recursion-issue-105275.stderr b/tests/ui/codegen/normalization-overflow/recursion-issue-105275.stderr
@@ -0,0 +1,14 @@
+error: reached the recursion limit while instantiating `encode_num::<&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut Error>`
+  --> $DIR/recursion-issue-105275.rs:6:9
+   |
+LL |         encode_num(n / 16, &mut writer)?;
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+note: `encode_num` defined here
+  --> $DIR/recursion-issue-105275.rs:4:1
+   |
+LL | pub fn encode_num<Writer: ExampleWriter>(n: u32, mut writer: Writer) -> Result<(), Writer::Error> {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: aborting due to 1 previous error
+
diff --git a/tests/ui/codegen/normalization-overflow/recursion-issue-105937.rs b/tests/ui/codegen/normalization-overflow/recursion-issue-105937.rs
@@ -1,9 +1,10 @@
-//@ known-bug: #105937
+//@ build-fail
 //@ compile-flags: -Copt-level=0
 
 pub fn encode_num<Writer: ExampleWriter>(n: u32, mut writer: Writer) -> Result<(), Writer::Error> {
     if n > 15 {
         encode_num(n / 16, &mut writer)?;
+        //~^ ERROR: reached the recursion limit while instantiating
     }
     Ok(())
 }
diff --git a/tests/ui/codegen/normalization-overflow/recursion-issue-105937.stderr b/tests/ui/codegen/normalization-overflow/recursion-issue-105937.stderr
@@ -0,0 +1,14 @@
+error: reached the recursion limit while instantiating `encode_num::<&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut Error>`
+  --> $DIR/recursion-issue-105937.rs:6:9
+   |
+LL |         encode_num(n / 16, &mut writer)?;
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+note: `encode_num` defined here
+  --> $DIR/recursion-issue-105937.rs:4:1
+   |
+LL | pub fn encode_num<Writer: ExampleWriter>(n: u32, mut writer: Writer) -> Result<(), Writer::Error> {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: aborting due to 1 previous error
+
diff --git a/tests/ui/codegen/normalization-overflow/recursion-issue-117696-2.rs b/tests/ui/codegen/normalization-overflow/recursion-issue-117696-2.rs
@@ -1,4 +1,4 @@
-//@ known-bug: #117696
+//@ build-fail
 //@ compile-flags: -Copt-level=0
 fn main() {
     rec(&mut None::<()>.into_iter());
@@ -9,5 +9,6 @@ fn rec<T: Iterator>(mut it: T) {
         it.next();
     } else {
         rec(&mut it);
+        //~^ ERROR: reached the recursion limit while instantiating
     }
 }
diff --git a/tests/ui/codegen/normalization-overflow/recursion-issue-117696-2.stderr b/tests/ui/codegen/normalization-overflow/recursion-issue-117696-2.stderr
@@ -0,0 +1,14 @@
+error: reached the recursion limit while instantiating `rec::<&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut std::option::IntoIter<()>>`
+  --> $DIR/recursion-issue-117696-2.rs:11:9
+   |
+LL |         rec(&mut it);
+   |         ^^^^^^^^^^^^
+   |
+note: `rec` defined here
+  --> $DIR/recursion-issue-117696-2.rs:7:1
+   |
+LL | fn rec<T: Iterator>(mut it: T) {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: aborting due to 1 previous error
+
diff --git a/tests/ui/codegen/normalization-overflow/recursion-issue-118590.rs b/tests/ui/codegen/normalization-overflow/recursion-issue-118590.rs
@@ -1,4 +1,4 @@
-//@ known-bug: #118590
+//@ build-fail
 
 fn main() {
     recurse(std::iter::empty::<()>())
@@ -8,4 +8,5 @@ fn recurse(nums: impl Iterator) {
     if true { return }
 
     recurse(nums.skip(42).peekable())
+    //~^ ERROR: reached the recursion limit while instantiating
 }
diff --git a/tests/ui/codegen/normalization-overflow/recursion-issue-118590.stderr b/tests/ui/codegen/normalization-overflow/recursion-issue-118590.stderr
@@ -0,0 +1,11 @@
+error: reached the recursion limit while instantiating `<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<Peekable<Skip<std::iter::Empty<()>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> as Iterator>::peekable`
+  --> $DIR/recursion-issue-118590.rs:10:13
+   |
+LL |     recurse(nums.skip(42).peekable())
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+note: `peekable` defined here
+  --> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
+
+error: aborting due to 1 previous error
+
diff --git a/tests/ui/codegen/normalization-overflow/recursion-issue-122823.rs b/tests/ui/codegen/normalization-overflow/recursion-issue-122823.rs
@@ -1,4 +1,4 @@
-//@ known-bug: #122823
+//@ build-fail
 //@ compile-flags: -Copt-level=0
 // ignore-tidy-linelength
 
@@ -41,6 +41,7 @@ pub fn operator_packet<I: Iterator<Item = u64>>(version: u64, type_id: u64, itr:
         version: version,
         type_id: type_id,
         packets: decode_packets(&mut itr.take(0).peekable()),
+        //~^ ERROR: reached the recursion limit while instantiating
     };
 
     return Some(Packet::Operator(p));
diff --git a/tests/ui/codegen/normalization-overflow/recursion-issue-122823.stderr b/tests/ui/codegen/normalization-overflow/recursion-issue-122823.stderr
@@ -0,0 +1,11 @@
+error: reached the recursion limit while instantiating `<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::vec::IntoIter<u64>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> as Iterator>::peekable`
+  --> $DIR/recursion-issue-122823.rs:43:38
+   |
+LL |         packets: decode_packets(&mut itr.take(0).peekable()),
+   |                                      ^^^^^^^^^^^^^^^^^^^^^^
+   |
+note: `peekable` defined here
+  --> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
+
+error: aborting due to 1 previous error
+
diff --git a/tests/ui/codegen/normalization-overflow/recursion-issue-131342.rs b/tests/ui/codegen/normalization-overflow/recursion-issue-131342.rs
@@ -1,4 +1,4 @@
-//@ known-bug: #131342
+//@ build-fail
 
 fn main() {
     let mut items = vec![1, 2, 3, 4, 5].into_iter();
@@ -7,6 +7,7 @@ fn main() {
 
 fn problem_thingy(items: &mut impl Iterator<Item = u8>) {
     let mut peeker = items.peekable();
+    //~^ ERROR: reached the recursion limit while instantiating
     match peeker.peek() {
         Some(_) => (),
         None => return (),
diff --git a/tests/ui/codegen/normalization-overflow/recursion-issue-131342.stderr b/tests/ui/codegen/normalization-overflow/recursion-issue-131342.stderr
@@ -0,0 +1,11 @@
+error: reached the recursion limit while instantiating `<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut Peekable<&mut std::vec::IntoIter<u8>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> as Iterator>::peekable`
+  --> $DIR/recursion-issue-131342.rs:9:22
+   |
+LL |     let mut peeker = items.peekable();
+   |                      ^^^^^^^^^^^^^^^^
+   |
+note: `peekable` defined here
+  --> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
+
+error: aborting due to 1 previous error
+
diff --git a/tests/ui/codegen/normalization-overflow/recursion-issue-139659.rs b/tests/ui/codegen/normalization-overflow/recursion-issue-139659.rs
@@ -1,5 +1,6 @@
-//@ known-bug: #139659
+//@ build-fail
 //@compile-flags: -Cdebuginfo=2 -Copt-level=0 --crate-type lib
+//~^^ ERROR: reached the recursion limit while instantiating
 trait Trait {
     type Output;
 }
diff --git a/tests/ui/codegen/normalization-overflow/recursion-issue-139659.stderr b/tests/ui/codegen/normalization-overflow/recursion-issue-139659.stderr
@@ -0,0 +1,10 @@
+error: reached the recursion limit while instantiating `recurse`
+   |
+note: `recurse` defined here
+  --> $DIR/recursion-issue-139659.rs:27:1
+   |
+LL | pub fn recurse() -> impl Sized {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: aborting due to 1 previous error
+
diff --git a/tests/ui/codegen/normalization-overflow/recursion-issue-92004.rs b/tests/ui/codegen/normalization-overflow/recursion-issue-92004.rs
@@ -1,4 +1,4 @@
-//@ known-bug: #102310
+//@ build-fail
 //@ compile-flags: -Copt-level=0
 //@ edition:2021
 // ignore-tidy-linelength
@@ -42,6 +42,7 @@ pub fn operator_packet<I: Iterator<Item = u64>>(version: u64, type_id: u64, itr:
         version: version,
         type_id: type_id,
         packets: decode_packets(&mut itr.take(0).peekable()),
+        //~^ ERROR: reached the recursion limit while instantiating
     };
 
     return Some(Packet::Operator(p));
diff --git a/tests/ui/codegen/normalization-overflow/recursion-issue-92004.stderr b/tests/ui/codegen/normalization-overflow/recursion-issue-92004.stderr
@@ -0,0 +1,11 @@
+error: reached the recursion limit while instantiating `<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::iter::Take<&mut Peekable<std::vec::IntoIter<u64>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> as Iterator>::peekable`
+  --> $DIR/recursion-issue-92004.rs:44:38
+   |
+LL |         packets: decode_packets(&mut itr.take(0).peekable()),
+   |                                      ^^^^^^^^^^^^^^^^^^^^^^
+   |
+note: `peekable` defined here
+  --> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
+
+error: aborting due to 1 previous error
+
diff --git a/tests/ui/codegen/normalization-overflow/recursion-issue-92470.rs b/tests/ui/codegen/normalization-overflow/recursion-issue-92470.rs
@@ -1,4 +1,4 @@
-//@ known-bug: #92470
+//@ build-fail
 fn main() {
     encode(&mut EncoderImpl);
 }
@@ -10,8 +10,10 @@ pub trait Encoder {
 }
 
 fn encode<E: Encoder>(mut encoder: E) {
+//~^ WARN: function cannot return without recursing
     encoder.writer();
     encode(&mut encoder);
+    //~^ ERROR: reached the recursion limit while instantiating
 }
 
 struct EncoderImpl;
diff --git a/tests/ui/codegen/normalization-overflow/recursion-issue-92470.stderr b/tests/ui/codegen/normalization-overflow/recursion-issue-92470.stderr
@@ -0,0 +1,26 @@
+warning: function cannot return without recursing
+  --> $DIR/recursion-issue-92470.rs:12:1
+   |
+LL | fn encode<E: Encoder>(mut encoder: E) {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot return without recursing
+...
+LL |     encode(&mut encoder);
+   |     -------------------- recursive call site
+   |
+   = help: a `loop` may express intention better if this is on purpose
+   = note: `#[warn(unconditional_recursion)]` on by default
+
+error: reached the recursion limit while instantiating `encode::<&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut EncoderImpl>`
+  --> $DIR/recursion-issue-92470.rs:15:5
+   |
+LL |     encode(&mut encoder);
+   |     ^^^^^^^^^^^^^^^^^^^^
+   |
+note: `encode` defined here
+  --> $DIR/recursion-issue-92470.rs:12:1
+   |
+LL | fn encode<E: Encoder>(mut encoder: E) {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: aborting due to 1 previous error; 1 warning emitted
+
diff --git a/tests/ui/codegen/normalization-overflow/recursion-issue-95134.rs b/tests/ui/codegen/normalization-overflow/recursion-issue-95134.rs
@@ -1,9 +1,10 @@
-//@ known-bug: #95134
+//@ build-fail
 //@ compile-flags: -Copt-level=0
 
 pub fn encode_num<Writer: ExampleWriter>(n: u32, mut writer: Writer) -> Result<(), Writer::Error> {
     if n > 15 {
         encode_num(n / 16, &mut writer)?;
+        //~^ ERROR: reached the recursion limit while instantiating
     }
     Ok(())
 }
diff --git a/tests/ui/codegen/normalization-overflow/recursion-issue-95134.stderr b/tests/ui/codegen/normalization-overflow/recursion-issue-95134.stderr
@@ -0,0 +1,14 @@
+error: reached the recursion limit while instantiating `encode_num::<&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut EmptyWriter>`
+  --> $DIR/recursion-issue-95134.rs:6:9
+   |
+LL |         encode_num(n / 16, &mut writer)?;
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+note: `encode_num` defined here
+  --> $DIR/recursion-issue-95134.rs:4:1
+   |
+LL | pub fn encode_num<Writer: ExampleWriter>(n: u32, mut writer: Writer) -> Result<(), Writer::Error> {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: aborting due to 1 previous error
+

Original file line number	Diff line number	Diff line change
`@@ -1,9 +1,10 @@`
`1`		`-//@ known-bug: #105275`
	`1`	`+//@ build-fail`
`2`	`2`	`//@ compile-flags: -Copt-level=0`
`3`	`3`
`4`	`4`	`pub fn encode_num<Writer: ExampleWriter>(n: u32, mut writer: Writer) -> Result<(), Writer::Error> {`
`5`	`5`	`if n > 15 {`
`6`	`6`	`encode_num(n / 16, &mut writer)?;`
	`7`	`+ //~^ ERROR: reached the recursion limit while instantiating`
`7`	`8`	`}`
`8`	`9`	`Ok(())`
`9`	`10`	`}`
Original file line number	Diff line number	Diff line change
`@@ -1,9 +1,10 @@`
`1`		`-//@ known-bug: #105937`
	`1`	`+//@ build-fail`
`2`	`2`	`//@ compile-flags: -Copt-level=0`
`3`	`3`
`4`	`4`	`pub fn encode_num<Writer: ExampleWriter>(n: u32, mut writer: Writer) -> Result<(), Writer::Error> {`
`5`	`5`	`if n > 15 {`
`6`	`6`	`encode_num(n / 16, &mut writer)?;`
	`7`	`+ //~^ ERROR: reached the recursion limit while instantiating`
`7`	`8`	`}`
`8`	`9`	`Ok(())`
`9`	`10`	`}`
Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-//@ known-bug: #117696`
	`1`	`+//@ build-fail`
`2`	`2`	`//@ compile-flags: -Copt-level=0`
`3`	`3`	`fn main() {`
`4`	`4`	`rec(&mut None::<()>.into_iter());`
`@@ -9,5 +9,6 @@ fn rec<T: Iterator>(mut it: T) {`
`9`	`9`	`it.next();`
`10`	`10`	`} else {`
`11`	`11`	`rec(&mut it);`
	`12`	`+ //~^ ERROR: reached the recursion limit while instantiating`
`12`	`13`	`}`
`13`	`14`	`}`
Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-//@ known-bug: #118590`
	`1`	`+//@ build-fail`
`2`	`2`
`3`	`3`	`fn main() {`
`4`	`4`	`recurse(std::iter::empty::<()>())`
`@@ -8,4 +8,5 @@ fn recurse(nums: impl Iterator) {`
`8`	`8`	`if true { return }`
`9`	`9`
`10`	`10`	`recurse(nums.skip(42).peekable())`
	`11`	`+ //~^ ERROR: reached the recursion limit while instantiating`
`11`	`12`	`}`