Rewrite and rename issue-38237 to rmake

Author: Oneirical

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -107,7 +107,6 @@ run-make/issue-35164/Makefile
 run-make/issue-36710/Makefile
 run-make/issue-37839/Makefile
 run-make/issue-37893/Makefile
-run-make/issue-38237/Makefile
 run-make/issue-40535/Makefile
 run-make/issue-46239/Makefile
 run-make/issue-47384/Makefile

tests/run-make/issue-38237/bar.rs renamed to tests/run-make/deref-impl-rustdoc-ice/bar.rs

@@ -0,0 +1,16 @@
+// A very specific set of circumstances (mainly, implementing Deref, and
+// having a procedural macro and a Debug derivation in external crates) caused
+// an internal compiler error (ICE) when trying to use rustdoc. This test
+// reproduces the exact circumstances which caused the bug and checks
+// that it does not happen again.
+// See https://github.com/rust-lang/rust/issues/38237
+
+//@ ignore-cross-compile
+
+use run_make_support::{rustc, rustdoc, tmp_dir};
+
+fn main() {
+    rustc().input("foo.rs").run();
+    rustc().input("bar.rs").run();
+    rustdoc().input("baz.rs").library_search_path(tmp_dir()).output(tmp_dir()).run();
+}