rewrite and rename issue-28766

Author: Oneirical

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -103,7 +103,6 @@ run-make/issue-25581/Makefile
 run-make/issue-26006/Makefile
 run-make/issue-26092/Makefile
 run-make/issue-28595/Makefile
-run-make/issue-28766/Makefile
 run-make/issue-30063/Makefile
 run-make/issue-33329/Makefile
 run-make/issue-35164/Makefile

tests/run-make/issue-28766/foo.rs renamed to tests/run-make/box-struct-no-segfault/foo.rs

@@ -0,0 +1,13 @@
+// The crate "foo" tied to this test executes a very specific function,
+// which involves boxing an instance of the struct Foo. However,
+// this once caused a segmentation fault in cargo release builds due to an LLVM
+// incorrect assertion.
+// This test checks that this bug does not resurface.
+// See https://github.com/rust-lang/rust/issues/28766
+
+use run_make_support::{rustc, tmp_dir};
+
+fn main() {
+    rustc().opt().input("foo.rs").run();
+    rustc().opt().library_search_path(tmp_dir()).input("main.rs").run();
+}