we can enable a bunch of tests for validation again

Author: RalfJung

tests/run-pass/dst-field-align.rs

@@ -8,9 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// FIXME: Broken by #296
-// compile-flags: -Zmir-emit-validate=0
-
 #![allow(dead_code)]
 
 struct Foo<T: ?Sized> {

tests/run-pass/mir_coercions.rs

@@ -8,9 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// FIXME: investigate again once #296 is fixed
-// compile-flags: -Zmir-emit-validate=0
-
 #![feature(coerce_unsized, unsize)]
 
 use std::ops::CoerceUnsized;

tests/run-pass/non_capture_closure_to_fn_ptr.rs

@@ -1,6 +1,3 @@
-// FIXME: investigate again once #296 is fixed
-// compile-flags: -Zmir-emit-validate=0
-
 // allow(const_err) to work around a bug in warnings
 #[allow(const_err)]
 static FOO: fn() = || { assert_ne!(42, 43) };

tests/run-pass/subslice_array.rs

@@ -1,6 +1,3 @@
-// FIXME: investigate again once #296 is fixed
-// compile-flags: -Zmir-emit-validate=0
-
 #![feature(advanced_slice_patterns)]
 #![feature(slice_patterns)]
 

tests/run-pass/tuple_like_enum_variant_constructor_pointer_opt.rs

@@ -1,6 +1,3 @@
-// FIXME: investigate again once #296 is fixed
-// compile-flags: -Zmir-emit-validate=0
-
 fn main() {
     let x = 5;
     assert_eq!(Some(&x).map(Some), Some(Some(&x)));