Add tracking issue to core-pattern-type

Author: clarfonthey

Diff for: core/src/lib.rs

@@ -391,7 +391,7 @@ pub mod net;
 pub mod option;
 pub mod panic;
 pub mod panicking;
-#[unstable(feature = "core_pattern_types", issue = "none")]
+#[unstable(feature = "core_pattern_types", issue = "123646")]
 pub mod pat;
 pub mod pin;
 #[unstable(feature = "new_range_api", issue = "125687")]

Diff for: core/src/pat.rs

@@ -6,7 +6,7 @@
 /// ```
 #[macro_export]
 #[rustc_builtin_macro(pattern_type)]
-#[unstable(feature = "core_pattern_type", issue = "none")]
+#[unstable(feature = "core_pattern_type", issue = "123646")]
 macro_rules! pattern_type {
     ($($arg:tt)*) => {
         /* compiler built-in */

Diff for: std/src/lib.rs

@@ -586,7 +586,7 @@ pub mod net;
 pub mod num;
 pub mod os;
 pub mod panic;
-#[unstable(feature = "core_pattern_types", issue = "none")]
+#[unstable(feature = "core_pattern_types", issue = "123646")]
 pub mod pat;
 pub mod path;
 #[unstable(feature = "anonymous_pipe", issue = "127154")]