1 files changed, 32 insertions, 0 deletions
diff --git a/third_party/rust/wasmparser/tests/big-module.rs b/third_party/rust/wasmparser/tests/big-module.rs
new file mode 100644
index 0000000000..d5cf37f4a4
--- /dev/null
+++ b/third_party/rust/wasmparser/tests/big-module.rs
@@ -0,0 +1,32 @@
+use wasm_encoder::*;
+#[test]
+fn big_type_indices() {
+    const N: u32 = 100_000;
+    let mut module = Module::new();
+    let mut types = TypeSection::new();
+    for _ in 0..N {
+        types.function([], []);
+    }
+    module.section(&types);
+    let mut funcs = FunctionSection::new();
+    funcs.function(N - 1);
+    module.section(&funcs);
+
+    let mut elems = ElementSection::new();
+    elems.declared(RefType::FUNCREF, Elements::Functions(&[0]));
+    module.section(&elems);
+
+    let mut code = CodeSection::new();
+    let mut body = Function::new([]);
+    body.instruction(&Instruction::RefFunc(0));
+    body.instruction(&Instruction::Drop);
+    body.instruction(&Instruction::End);
+    code.function(&body);
+    module.section(&code);
+
+    let wasm = module.finish();
+
+    wasmparser::Validator::default()
+        .validate_all(&wasm)
+        .unwrap();
+}