Index: src/org/eclipse/jdt/core/tests/compiler/regression/LookupTest.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core.tests.compiler/src/org/eclipse/jdt/core/tests/compiler/regression/LookupTest.java,v
--- src/org/eclipse/jdt/core/tests/compiler/regression/LookupTest.java	18 May 2006 17:52:43 -0000	1.56
+++ src/org/eclipse/jdt/core/tests/compiler/regression/LookupTest.java	13 Nov 2008 10:05:46 -0000
@@ -2395,6 +2395,7 @@ 
 		null /* no custom requestor*/,
 	  	false /* do not skip javac for this peculiar test */);
 }
+
 public void test072() {
 	this.runNegativeTest(
 			new String[] {
@@ -2422,6 +2423,39 @@ 
 			"The method foo(String) is ambiguous for the type AX\n" + 
 			"----------\n");
 }
+
+//https://bugs.eclipse.org/bugs/show_bug.cgi?id=150758
+public void test075() {
+	this.runConformTest(
+			new String[] {
+				"package1/Test.java",//===================
+				"package package1;\n"  +
+				"import package2.MyList;\n"  +
+				"public class Test {\n"  +
+				"        public void reproduce(String sortKey, boolean isAscending) {\n"  +
+				"                MyList recList = new MyList();\n"  +
+				"                recList.add(null);\n"  +
+				"        }\n"  +
+				"}\n",//===================
+				"package2/MyList.java",//===================
+				"package package2;\n"  +
+				"import java.util.AbstractList;\n"  +
+				"import java.util.List;\n"  +
+				"public class MyList extends AbstractList implements List {\n"  +
+				"        void add(Integer i) {\n"  +
+				"        }\n"  +
+				"        public Object get(int index) {\n"  +
+				"                return null;\n"  +
+				"        }\n"  +
+				"        public int size() {\n"  +
+				"                return 0;\n"  +
+				"        }\n"  +
+				"}", // =================
+			},
+			"");
+}
+
+
 public static Class testClass() {	return LookupTest.class;
 }
 }
Index: compiler/org/eclipse/jdt/internal/compiler/lookup/Scope.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/compiler/org/eclipse/jdt/internal/compiler/lookup/Scope.java,v
--- compiler/org/eclipse/jdt/internal/compiler/lookup/Scope.java	18 May 2006 19:59:45 -0000	1.279
+++ compiler/org/eclipse/jdt/internal/compiler/lookup/Scope.java	13 Nov 2008 10:05:48 -0000
@@ -1219,12 +1219,12 @@ 
 
 		// check for duplicate parameterized methods
 		if (compilerOptions().sourceLevel >= ClassFileConstants.JDK1_5) {
-			for (int i = 0; i < candidatesCount; i++) {
+			for (int i = 0; i < visiblesCount; i++) {
 				MethodBinding current = candidates[i];
 				if (current instanceof ParameterizedGenericMethodBinding)
 					current = ((ParameterizedGenericMethodBinding) current).originalMethod;
 				if (current instanceof ParameterizedMethodBinding)
-					for (int j = i + 1; j < candidatesCount; j++)
+					for (int j = i + 1; j < visiblesCount; j++)
 						if (current.declaringClass == candidates[j].declaringClass && current.areParametersEqual(candidates[j]))
 							return new ProblemMethodBinding(candidates[i].selector, candidates[i].parameters, ProblemReasons.Ambiguous);
 			}