diff --git a/cranelift/codegen/src/machinst/vcode.rs b/cranelift/codegen/src/machinst/vcode.rs
index f9ef6670f8..aa73ae041c 100644
--- a/cranelift/codegen/src/machinst/vcode.rs
+++ b/cranelift/codegen/src/machinst/vcode.rs
@@ -603,9 +603,14 @@ impl<I: VCodeInst> VCodeBuilder<I> {
         // will be returned directly to `regalloc2` eventually and all
         // operands/results of instructions will use the alias-resolved vregs
         // from `regalloc2`'s perspective.
+        //
+        // Also note that `reftyped_vregs` can't have duplicates, so after the
+        // aliases are applied duplicates are removed.
         for reg in self.vcode.reftyped_vregs.iter_mut() {
             *reg = Self::resolve_vreg_alias_impl(&self.vcode.vreg_aliases, *reg);
         }
+        self.vcode.reftyped_vregs.sort();
+        self.vcode.reftyped_vregs.dedup();
 
         self.compute_preds_from_succs();
         self.vcode.debug_value_labels.sort_unstable();
diff --git a/crates/fuzzing/src/oracles.rs b/crates/fuzzing/src/oracles.rs
index ae15eac8dd..6d387f1c3e 100644
--- a/crates/fuzzing/src/oracles.rs
+++ b/crates/fuzzing/src/oracles.rs
@@ -716,6 +716,12 @@ fn table_ops_eventually_gcs() {
     use arbitrary::Unstructured;
     use rand::prelude::*;
 
+    // Skip if we're under emulation because some fuzz configurations will do
+    // large address space reservations that QEMU doesn't handle well.
+    if std::env::var("WASMTIME_TEST_NO_HOG_MEMORY").is_ok() {
+        return;
+    }
+
     let mut rng = SmallRng::seed_from_u64(0);
     let mut buf = vec![0; 2048];
     let n = 100;