Add tests to fixed ICEs

Closes #27078. Closes #27985. Closes #39848. Closes #42164.
Closes #42479. Closes #45152. Closes #45662. Closes #45876.
Closes #45965.

src/test/run-pass/macro-nested_expr.rs

@@ -0,0 +1,32 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// #42164
+
+#![feature(decl_macro)]
+#![allow(dead_code)]
+
+pub macro m($inner_str:expr) {
+    #[doc = $inner_str]
+    struct S;
+}
+
+macro_rules! define_f {
+    ($name:expr) => {
+        #[export_name = $name]
+        fn f() {}
+    }
+}
+
+fn main() {
+    define_f!(concat!("exported_", "f"));
+    m!(stringify!(foo));
+}
+