rewrite and rename issue-14698 to rmake

Author: Oneirical

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -28,7 +28,6 @@ run-make/incr-add-rust-src-component/Makefile
 run-make/incr-foreign-head-span/Makefile
 run-make/interdependent-c-libraries/Makefile
 run-make/issue-107094/Makefile
-run-make/issue-14698/Makefile
 run-make/issue-15460/Makefile
 run-make/issue-33329/Makefile
 run-make/issue-35164/Makefile

tests/run-make/issue-14698/foo.rs renamed to tests/run-make/invalid-tmpdir-env-var/foo.rs

@@ -0,0 +1,18 @@
+// When the TMP or TMPDIR variable is set to an invalid or non-existing directory,
+// this used to cause an internal compiler error (ICE). After the addition of proper
+// error handling in #28430, this test checks that the expected message is printed.
+// See https://github.com/rust-lang/rust/issues/14698
+
+use run_make_support::rustc;
+
+// NOTE: This is not a UI test despite its simplicity, as the error message contains a path
+// with some variability that is difficult to normalize
+
+fn main() {
+    rustc()
+        .input("foo.rs")
+        .env("TMP", "fake")
+        .env("TMPDIR", "fake")
+        .run_fail()
+        .assert_stderr_contains("couldn't create a temp dir");
+}