Add a test for OOB ranges

Author: oli-obk

src/test/ui/layout/valid_range_oob.rs

@@ -0,0 +1,15 @@
+// failure-status: 101
+// normalize-stderr-test "note: .*\n\n" -> ""
+// normalize-stderr-test "thread 'rustc' panicked.*\n" -> ""
+// rustc-env:RUST_BACKTRACE=0
+
+#![feature(rustc_attrs)]
+
+#[rustc_layout_scalar_valid_range_end(257)]
+struct Foo(i8);
+
+// Need to do in a constant, as runtime codegen
+// does not compute the layout of `Foo` in check builds.
+const FOO: Foo = unsafe { Foo(1) };
+
+fn main() {}

src/test/ui/layout/valid_range_oob.stderr

@@ -0,0 +1,6 @@
+error: internal compiler error: unexpected panic
+
+query stack during panic:
+#0 [layout_of] computing layout of `Foo`
+#1 [eval_to_allocation_raw] const-evaluating + checking `FOO`
+end of query stack