[strong] Disallow implicit conversions for binary arithmetic operations

src/code-stubs.cc

Index: src/code-stubs.cc
diff --git a/src/code-stubs.cc b/src/code-stubs.cc
index 29fbb3c8648a8fff2fbbdcba11ffefee7be3b826..e3940dad649cb1de5b44bcb29431495d1afc58d5 100644
--- a/src/code-stubs.cc
+++ b/src/code-stubs.cc
@@ -268,7 +268,8 @@ MaybeHandle<Code> CodeStub::GetCode(Isolate* isolate, uint32_t key) {
 void BinaryOpICStub::GenerateAheadOfTime(Isolate* isolate) {
   // Generate the uninitialized versions of the stub.
   for (int op = Token::BIT_OR; op <= Token::MOD; ++op) {
-    BinaryOpICStub stub(isolate, static_cast<Token::Value>(op));
+    BinaryOpICStub stub(isolate, static_cast<Token::Value>(op),
+                        LanguageMode::SLOPPY);
     stub.GetCode();
   }