ignore "use asm" (#9019)

Preventing V8 from logging erroneous line numbers. Use wasm.

3 files changed, 38 insertions, 0 deletions

diff --git a/cli/tests/integration_tests.rs b/cli/tests/integration_tests.rs
index cd222f0b4..68cfe0b50 100644
--- a/cli/tests/integration_tests.rs
+++ b/cli/tests/integration_tests.rs
@@ -3522,6 +3522,23 @@ itest!(inline_js_source_map_with_contents_from_graph {
 });
 
 #[test]
+fn no_validate_asm() {
+  let output = util::deno_cmd()
+    .current_dir(util::root_path())
+    .arg("run")
+    .arg("cli/tests/no_validate_asm.js")
+    .stderr(std::process::Stdio::piped())
+    .stdout(std::process::Stdio::piped())
+    .spawn()
+    .unwrap()
+    .wait_with_output()
+    .unwrap();
+  assert!(output.status.success());
+  assert!(output.stderr.is_empty());
+  assert!(output.stdout.is_empty());
+}
+
+#[test]
 fn cafile_env_fetch() {
   use deno_core::url::Url;
   let _g = util::http_server();
diff --git a/cli/tests/no_validate_asm.js b/cli/tests/no_validate_asm.js
new file mode 100644
index 000000000..38ea0a446
--- /dev/null
+++ b/cli/tests/no_validate_asm.js
@@ -0,0 +1,20 @@
+// V8 logs any asmjs validation errors to stdout, but it shows line numbers that
+// are non-existent in the source.
+
+const asmJsModule = function () {
+  "use asm";
+
+  function func(
+    x,
+  ) {
+    x = +x; // cast to float
+
+    ~x;
+    // asmjs error: `~` is only valid on integers
+    // should not log to stdout with --no-validate-asm
+  }
+
+  return {
+    f: func,
+  };
+}();
diff --git a/core/runtime.rs b/core/runtime.rs
index 7e8ac48fa..700d378b1 100644
--- a/core/runtime.rs
+++ b/core/runtime.rs
@@ -158,6 +158,7 @@ pub unsafe fn v8_init() {
     "--wasm-test-streaming".to_string(),
     "--no-wasm-async-compilation".to_string(),
     "--harmony-top-level-await".to_string(),
+    "--no-validate-asm".to_string(),
   ];
   v8::V8::set_flags_from_command_line(argv);
 }