Auto merge of #29980 - Manishearth:missing-diag, r=eddyb

None

src/librustc/diagnostics.rs

@@ -858,6 +858,9 @@ fn foo<T: MyTransmutableType>(x: Vec<T>) {
 ```
 ptr::read(&v as *const _ as *const SomeType) // `v` transmuted to `SomeType`
 ```
+
+Note that this does not move `v` (unlike `transmute`), and may need a
+call to `mem::forget(v)` in case you want to avoid destructors being called.
 "##,
 
 E0152: r##"

src/librustc_driver/lib.rs

@@ -907,6 +907,8 @@ pub fn diagnostics_registry() -> diagnostics::registry::Registry {
     all_errors.push_all(&rustc_typeck::DIAGNOSTICS);
     all_errors.push_all(&rustc_borrowck::DIAGNOSTICS);
     all_errors.push_all(&rustc_resolve::DIAGNOSTICS);
+    all_errors.push_all(&rustc_privacy::DIAGNOSTICS);
+    all_errors.push_all(&rustc_trans::DIAGNOSTICS);
 
     Registry::new(&*all_errors)
 }

src/librustc_privacy/lib.rs

@@ -1505,3 +1505,5 @@ pub fn check_crate(tcx: &ty::ctxt,
 
     access_levels
 }
+
+__build_diagnostic_array! { librustc_privacy, DIAGNOSTICS }

src/librustc_trans/lib.rs

@@ -89,3 +89,5 @@ pub mod back {
 pub mod lib {
     pub use llvm;
 }
+
+__build_diagnostic_array! { librustc_trans, DIAGNOSTICS }