add issue numbers via // issue: rust-lang/rust#ISSUE_NUM directive

tests/ui/associated-type-bounds/resolution-failure-building-vtable-representation-ice-90691.rs

@@ -1,5 +1,6 @@
 // ICE #90691 Encountered error `Unimplemented` selecting  ...
 //@ build-pass
+// issue: rust-lang/rust#90691
 
 trait TError: std::fmt::Debug {}
 impl TError for () {}

tests/ui/const-generics/generic_const_exprs/failed-to-normalize-ice-issue-88421.rs

@@ -1,5 +1,5 @@
 //@ check-pass
-
+// issue: rust-lang/rust#88421
 #![feature(adt_const_params)]
 #![feature(generic_const_exprs)]
 #![allow(incomplete_features)]

tests/ui/consts/ice-bad-input-type-for-cast-83056.rs

@@ -1,4 +1,5 @@
 // #83056 ICE "bad input type for cast"
+// issue: rust-lang/rust#83056
 
 struct S([bool; f as usize]);
 fn f() -> T {}

tests/ui/consts/ice-bad-input-type-for-cast-83056.stderr

@@ -1,5 +1,5 @@
 error[E0412]: cannot find type `T` in this scope
-  --> $DIR/ice-bad-input-type-for-cast-83056.rs:4:11
+  --> $DIR/ice-bad-input-type-for-cast-83056.rs:5:11
    |
 LL | struct S([bool; f as usize]);
    | ----------------------------- similarly named struct `S` defined here

tests/ui/extern/extern-C-non-FFI-safe-arg-ice-52334.rs

@@ -1,6 +1,6 @@
 // test for #52334 ICE when casting extern "C" fn when it has a non-FFI-safe argument
 //@ check-pass
-
+// issue: rust-lang/rust#52334
 type Foo = extern "C" fn(::std::ffi::CStr);
 //~^ WARN `extern` fn uses type `[i8]`, which is not FFI-safe
 extern "C" {

tests/ui/extern/extern-C-str-arg-ice-80125.rs

@@ -1,4 +1,4 @@
-// test for #80125
+// issue: rust-lang/rust#80125
 //@ check-pass
 type ExternCallback = extern "C" fn(*const u8, u32, str);
 //~^ WARN `extern` fn uses type `str`, which is not FFI-safe

tests/ui/privacy/decl-macro-infinite-global-import-cycle-ice-64784.rs

@@ -1,5 +1,6 @@
 // ICE #64784  already borrowed: BorrowMutError
 //@ check-pass
+// issue: rust-lang/rust#64784
 #![feature(decl_macro)]
 
 pub macro m($i:ident, $j:ident) {

tests/ui/sized/stack-overflow-trait-infer-98842.32bit.stderr

@@ -0,0 +1,25 @@
+error[E0391]: cycle detected when computing layout of `Foo`
+   |
+   = note: ...which requires computing layout of `<&'static Foo as core::ops::deref::Deref>::Target`...
+   = note: ...which again requires computing layout of `Foo`, completing the cycle
+note: cycle used when const-evaluating + checking `_`
+  --> $DIR/stack-overflow-trait-infer-98842.rs:15:1
+   |
+LL | const _: *const Foo = 0 as _;
+   | ^^^^^^^^^^^^^^^^^^^
+   = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
+
+error[E0080]: it is undefined behavior to use this value
+  --> $DIR/stack-overflow-trait-infer-98842.rs:15:1
+   |
+LL | const _: *const Foo = 0 as _;
+   | ^^^^^^^^^^^^^^^^^^^ a cycle occurred during layout computation
+   |
+   = note: the raw bytes of the constant (size: 4, align: 4) {
+               00 00 00 00                                     │ ....
+           }
+
+error: aborting due to 2 previous errors
+
+Some errors have detailed explanations: E0080, E0391.
+For more information about an error, try `rustc --explain E0080`.

tests/ui/sized/stack-overflow-trait-infer-98842.64bit.stderr

@@ -0,0 +1,25 @@
+error[E0391]: cycle detected when computing layout of `Foo`
+   |
+   = note: ...which requires computing layout of `<&'static Foo as core::ops::deref::Deref>::Target`...
+   = note: ...which again requires computing layout of `Foo`, completing the cycle
+note: cycle used when const-evaluating + checking `_`
+  --> $DIR/stack-overflow-trait-infer-98842.rs:15:1
+   |
+LL | const _: *const Foo = 0 as _;
+   | ^^^^^^^^^^^^^^^^^^^
+   = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
+
+error[E0080]: it is undefined behavior to use this value
+  --> $DIR/stack-overflow-trait-infer-98842.rs:15:1
+   |
+LL | const _: *const Foo = 0 as _;
+   | ^^^^^^^^^^^^^^^^^^^ a cycle occurred during layout computation
+   |
+   = note: the raw bytes of the constant (size: 8, align: 8) {
+               00 00 00 00 00 00 00 00                         │ ........
+           }
+
+error: aborting due to 2 previous errors
+
+Some errors have detailed explanations: E0080, E0391.
+For more information about an error, try `rustc --explain E0080`.

tests/ui/sized/stack-overflow-trait-infer-98842.rs

@@ -1,7 +1,10 @@
 // #98842 stack overflow in trait inference
+// issue: rust-lang/rust#98842
 //@ check-fail
 //@ edition:2021
-//~^^^ ERROR cycle detected when computing layout of `Foo`
+//@ stderr-per-bitwidth
+//@ ignore-endian-big
+//~^^^^^^ ERROR cycle detected when computing layout of `Foo`
 
 // If the inner `Foo` is named through an associated type,
 // the "infinite size" error does not occur.

tests/ui/sized/stack-overflow-trait-infer-98842.stderr

@@ -3,14 +3,14 @@ error[E0391]: cycle detected when computing layout of `Foo`
    = note: ...which requires computing layout of `<&'static Foo as core::ops::deref::Deref>::Target`...
    = note: ...which again requires computing layout of `Foo`, completing the cycle
 note: cycle used when const-evaluating + checking `_`
-  --> $DIR/stack-overflow-trait-infer-98842.rs:12:1
+  --> $DIR/stack-overflow-trait-infer-98842.rs:13:1
    |
 LL | const _: *const Foo = 0 as _;
    | ^^^^^^^^^^^^^^^^^^^
    = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
 
 error[E0080]: it is undefined behavior to use this value
-  --> $DIR/stack-overflow-trait-infer-98842.rs:12:1
+  --> $DIR/stack-overflow-trait-infer-98842.rs:13:1
    |
 LL | const _: *const Foo = 0 as _;
    | ^^^^^^^^^^^^^^^^^^^ a cycle occurred during layout computation

tests/ui/unsized-locals/ice-size_and_align_of-closure-not-supported-88212.rs

@@ -1,5 +1,5 @@
 // ICE size_and_align_of::<[closure@test.rs:15:5: 17:7]> not supported #88212
-
+// issue: rust-lang/rust#88212
 #![feature(unsized_locals)]
 //~^ WARN the feature `unsized_locals` is incomplete and may not be safe to use and/or cause compiler crashes