These tests hang or make the box OOM

Index: rust/tests/ui/associated-consts/issue-93775.rs
===================================================================
--- rust.orig/tests/ui/associated-consts/issue-93775.rs
+++ rust/tests/ui/associated-consts/issue-93775.rs
@@ -1,5 +1,6 @@
 // build-pass
 // ignore-tidy-linelength
+// ignore-hurd
 
 // Regression for #93775, needs build-pass to test it.
 
Index: rust/tests/ui/issues/issue-74564-if-expr-stack-overflow.rs
===================================================================
--- rust.orig/tests/ui/issues/issue-74564-if-expr-stack-overflow.rs
+++ rust/tests/ui/issues/issue-74564-if-expr-stack-overflow.rs
@@ -1,5 +1,6 @@
 // build-pass
 // ignore-tidy-filelength
+// ignore-hurd
 #![crate_type = "rlib"]
 
 fn banana(v: &str) -> u32 {
Index: rust/tests/ui/threads-sendsync/mpsc_stress.rs
===================================================================
--- rust.orig/tests/ui/threads-sendsync/mpsc_stress.rs
+++ rust/tests/ui/threads-sendsync/mpsc_stress.rs
@@ -1,6 +1,7 @@
 // run-pass
 // compile-flags:--test
 // ignore-emscripten
+// ignore-hurd
 
 use std::sync::mpsc::channel;
 use std::sync::mpsc::TryRecvError;
Index: rust/tests/run-make/long-linker-command-lines/foo.rs
===================================================================
--- rust.orig/tests/run-make/long-linker-command-lines/foo.rs
+++ rust/tests/run-make/long-linker-command-lines/foo.rs
@@ -44,6 +44,13 @@ fn read_linker_args(path: &Path) -> Stri
     }
 }
 
+#[cfg(target_os = "hurd")]
+// Debian: test causes build to fail on hurd
+fn main() {
+    return;
+}
+
+#[cfg(not(target_os = "hurd"))]
 fn main() {
     let tmpdir = PathBuf::from(env::var_os("TMPDIR").unwrap());
     let ok = tmpdir.join("ok");