2 files changed, 36 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/wasm/regress/bug1777604/directives.txt b/js/src/jit-test/tests/wasm/regress/bug1777604/directives.txt
new file mode 100644
index 0000000000..e627a21880
--- /dev/null
+++ b/js/src/jit-test/tests/wasm/regress/bug1777604/directives.txt
@@ -0,0 +1 @@
+|jit-test| --ion-offthread-compile=off; --ion-eager; include:wasm.js
diff --git a/js/src/jit-test/tests/wasm/regress/bug1777604/test.js b/js/src/jit-test/tests/wasm/regress/bug1777604/test.js
new file mode 100644
index 0000000000..5accdbdd14
--- /dev/null
+++ b/js/src/jit-test/tests/wasm/regress/bug1777604/test.js
@@ -0,0 +1,35 @@
+// |jit-test| skip-if: !wasmStreamingEnabled()
+
+const { Instance, compile, compileStreaming } = WebAssembly;
+
+for (let i = 0; i < 200; i++) {
+    // Possibly free code from a previous iteration, increasing probability
+    // new code will be allocated in a location previous code was.
+    gc(undefined, "shrinking");
+
+    function compileAndRun(x, g) {
+        var cache = streamCacheEntry(wasmTextToBinary(x));
+
+        compileStreaming(cache).then(function (m) {
+            g(new Instance(m, undefined));
+            return compileStreaming(cache);
+        }).then(function (m) {
+            g(new Instance(m, undefined));
+        });
+
+        // Serialize the promise execution at this point
+        drainJobQueue();
+    }
+
+    // Compile two different modules to increase probability that a module is
+    // is compiled to a page that a different module resided in previously.
+    compileAndRun('(module \
+        (func $test (param i64) (result f64) local.get 0 f64.convert_i64_u )\
+        (func (export "run") (result i32) i64.const 1 call $test f64.const 1 f64.eq )\
+    )', function (i) {});
+    compileAndRun('(module \
+        (func (export "run") (result i64) (i64.const 1))\
+    )', function (i) {
+        i.exports.run();
+    });
+}