rewrite output-filename-overwrites-input to rmake

Author: Oneirical

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -152,7 +152,6 @@ run-make/no-duplicate-libs/Makefile
 run-make/obey-crate-type-flag/Makefile
 run-make/optimization-remarks-dir-pgo/Makefile
 run-make/optimization-remarks-dir/Makefile
-run-make/output-filename-overwrites-input/Makefile
 run-make/output-type-permutations/Makefile
 run-make/output-with-hyphens/Makefile
 run-make/override-aliased-flags/Makefile

tests/run-make/output-filename-overwrites-input/Makefile

@@ -0,0 +1,21 @@
+// If rustc is invoked on a file that would be overwritten by the
+// compilation, the compilation should fail, to avoid accidental loss.
+// See https://github.com/rust-lang/rust/pull/46814
+
+//@ ignore-cross-compile
+
+use run_make_support::{fs_wrapper, rustc};
+
+fn main() {
+    fs_wrapper::copy("foo.rs", "foo");
+    rustc().input("foo").output("foo").run_fail().assert_stderr_contains(
+        r#"the input file "foo" would be overwritten by the generated executable"#,
+    );
+    fs_wrapper::copy("bar.rs", "bar.rlib");
+    rustc().input("bar.rlib").output("bar.rlib").run_fail().assert_stderr_contains(
+        r#"the input file "bar.rlib" would be overwritten by the generated executable"#,
+    );
+    rustc().input("foo.rs").output("foo.rs").run_fail().assert_stderr_contains(
+        r#"the input file "foo.rs" would be overwritten by the generated executable"#,
+    );
+}