diff --git a/lynglib/src/commonMain/kotlin/net/sergeych/lyng/ClosureScope.kt b/lynglib/src/commonMain/kotlin/net/sergeych/lyng/ClosureScope.kt
index bf2824a..f49377a 100644
--- a/lynglib/src/commonMain/kotlin/net/sergeych/lyng/ClosureScope.kt
+++ b/lynglib/src/commonMain/kotlin/net/sergeych/lyng/ClosureScope.kt
@@ -1,5 +1,5 @@
 /*
- * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
+ * Copyright 2026 Sergey S. Chernov real.sergeych@gmail.com
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -66,6 +66,11 @@ class ClosureScope(val callScope: Scope, val closureScope: Scope) :
             }
         }
 
+        // 1b) Captured locals from the entire closure ancestry. This ensures that parameters
+        // and local variables shadow members of captured receivers, matching standard
+        // lexical scoping rules.
+        closureScope.chainLookupIgnoreClosure(name, followClosure = true)?.let { return it }
+
         // 2) Members on the captured receiver instance
         (closureScope.thisObj as? net.sergeych.lyng.obj.ObjInstance)?.let { inst ->
             // Check direct locals in instance scope (unmangled)
@@ -94,7 +99,7 @@ class ClosureScope(val callScope: Scope, val closureScope: Scope) :
         }
 
         // 3) Closure scope chain (locals/parents + members), ignore ClosureScope overrides to prevent recursion
-        closureScope.chainLookupWithMembers(name, currentClassCtx)?.let { return it }
+        closureScope.chainLookupWithMembers(name, currentClassCtx, followClosure = true)?.let { return it }
 
         // 4) Caller `this` members
         (callScope.thisObj as? net.sergeych.lyng.obj.ObjInstance)?.let { inst ->
diff --git a/lynglib/src/commonMain/kotlin/net/sergeych/lyng/Scope.kt b/lynglib/src/commonMain/kotlin/net/sergeych/lyng/Scope.kt
index ff98401..7d10fc4 100644
--- a/lynglib/src/commonMain/kotlin/net/sergeych/lyng/Scope.kt
+++ b/lynglib/src/commonMain/kotlin/net/sergeych/lyng/Scope.kt
@@ -120,14 +120,14 @@ open class Scope(
         return null
     }
 
-    internal fun chainLookupIgnoreClosure(name: String): ObjRecord? {
+    internal fun chainLookupIgnoreClosure(name: String, followClosure: Boolean = false): ObjRecord? {
         var s: Scope? = this
         // use frameId to detect unexpected structural cycles in the parent chain
         val visited = HashSet<Long>(4)
         while (s != null) {
             if (!visited.add(s.frameId)) return null
             tryGetLocalRecord(s, name, currentClassCtx)?.let { return it }
-            s = s.parent
+            s = if (followClosure && s is ClosureScope) s.closureScope else s.parent
         }
         return null
     }
@@ -169,7 +169,7 @@ open class Scope(
      * This completely avoids invoking overridden `get` implementations, preventing
      * ping-pong recursion between `ClosureScope` frames.
      */
-    internal fun chainLookupWithMembers(name: String, caller: net.sergeych.lyng.obj.ObjClass? = currentClassCtx): ObjRecord? {
+    internal fun chainLookupWithMembers(name: String, caller: net.sergeych.lyng.obj.ObjClass? = currentClassCtx, followClosure: Boolean = false): ObjRecord? {
         var s: Scope? = this
         val visited = HashSet<Long>(4)
         while (s != null) {
@@ -185,7 +185,7 @@ open class Scope(
                     } else return rec
                 }
             }
-            s = s.parent
+            s = if (followClosure && s is ClosureScope) s.closureScope else s.parent
         }
         return null
     }
diff --git a/lynglib/src/commonTest/kotlin/ScriptTest.kt b/lynglib/src/commonTest/kotlin/ScriptTest.kt
index 6cc59ba..bc4c617 100644
--- a/lynglib/src/commonTest/kotlin/ScriptTest.kt
+++ b/lynglib/src/commonTest/kotlin/ScriptTest.kt
@@ -4683,5 +4683,42 @@ class ScriptTest {
             x.getLyngExceptionMessageWithStackTrace()
         )
     }
+
+    @Test
+    fun testMapIteralAmbiguity() = runTest {
+        eval("""
+            val m = { a: 1, b: { foo: "bar" } }
+            assertEquals(1, m["a"])
+            assertEquals("bar", m["b"]["foo"])
+            val bar = "foobar"
+            val m2 = { a: 1, b: { bar: } }
+            assert( m2["b"] is Map )
+            assertEquals("foobar", m2["b"]["bar"])
+        """.trimIndent())
+    }
+
+    @Test
+    fun realWorldCaptureProblem() = runTest {
+        eval("""
+            // 61755f07-630c-4181-8d50-1b044d96e1f4
+            class T {
+                static var f1 = null
+                static fun t(name=null) {
+                    run {
+                        // I expect it will catch the 'name' from
+                        // param? 
+                        f1 = name
+                    }
+                }
+            }
+            assert(T.f1 == null)
+            println("-- "+T.f1::class)
+            println("-- "+T.f1)
+            T.t("foo")
+            println("2- "+T.f1::class)
+            println("2- "+T.f1)
+            assert(T.f1 == "foo")
+        """.trimIndent())
+    }
 }