fix: function body comments.

compiler/frontend/src/org/jetbrains/kotlin/extensions/internal/NonStableExtensionPoints.kt

@@ -36,7 +36,7 @@ import org.jetbrains.kotlin.types.expressions.ExpressionTypingContext
  */
 @RequiresOptIn(level = RequiresOptIn.Level.ERROR)
 @Retention(AnnotationRetention.BINARY)
-internal annotation class InternalNonStableExtensionPoints
+annotation class InternalNonStableExtensionPoints
 
 @InternalNonStableExtensionPoints
 interface TypeResolutionInterceptorExtension {

js/js.parser/src/com/google/gwt/dev/js/rhino/Parser.java

@@ -153,7 +153,7 @@ public class Parser {
         Node pn = nf.createBlock(ts.tokenPosition);
         try {
             int tt;
-            while ((tt = ts.peekToken()) > TokenStream.EOF && tt != TokenStream.RC) {
+            while ((tt = ts.peekTokenWithComment()) > TokenStream.EOF && tt != TokenStream.RC) {
                 if (tt == TokenStream.FUNCTION) {
                     ts.getToken();
                     pn.addChildToBack(function(ts, false));

js/js.parser/src/com/google/gwt/dev/js/rhino/TokenStream.java

@@ -536,13 +536,19 @@ public class TokenStream {
     }
 
     public int peekToken() throws IOException {
-        int result = getToken();
+        return peekTokenHelper(getToken());
+    }
 
-        this.pushbackToken = result;
+    public int peekTokenWithComment() throws IOException {
+        return peekTokenHelper(getTokenWithComment());
+    }
+
+    private int peekTokenHelper(int token) throws IOException {
+        this.pushbackToken = token;
         lastPosition = secondToLastPosition;
         lastTokenPosition = tokenPosition;
         tokenno--;
-        return result;
+        return token;
     }
 
     public int peekTokenSameLine() throws IOException {

js/js.translator/testData/box/jsCode/comments.kt

@@ -1,6 +1,8 @@
 // EXPECTED_REACHABLE_NODES: 1282
 // CHECK_COMMENT_EXISTS: text="Single line comment" multiline=false
 // CHECK_COMMENT_EXISTS: text="Multi line comment" multiline=true
+// CHECK_COMMENT_EXISTS: text="Single line comment inside function" multiline=false
+// CHECK_COMMENT_EXISTS: text="Multi line comment inside function" multiline=true
 // CHECK_COMMENT_EXISTS: text="After call single line comment" multiline=false
 // CHECK_COMMENT_EXISTS: text="After call multi line comment" multiline=true
 // CHECK_COMMENT_DOESNT_EXIST: text="random position comment 1" multiline=true
@@ -11,7 +13,11 @@ package foo
 
 fun box(): String {
     js("""
-        function foo() {}
+        function foo() {
+            // Single line comment inside function
+            Object;
+            /*Multi line comment inside function*/
+        }
         
         // Single line comment
         foo();