name clash when several files of the same package has different paths but the same name #KT-2713 Fixed

compiler/backend/src/org/jetbrains/jet/codegen/NamespaceCodegen.java

@@ -301,6 +301,7 @@ public class NamespaceCodegen extends GenerationStateAware {
         }
 
         // dollar sign in the end is to prevent synthetic class from having "Test" or other parseable suffix
-        return namespaceInternalName + "$src$" + name.substring(substringFrom, substringTo) + "$";
+        // path hashCode to prevent same name / different path collision
+        return namespaceInternalName + "$src$" + name.substring(substringFrom, substringTo) + "$" + file.getVirtualFile().getCanonicalPath().hashCode();
     }
 }

compiler/testData/codegen/multi/same/1/box.kt

@@ -0,0 +1 @@
+fun box() = box1() + "K"

compiler/testData/codegen/multi/same/2/box.kt

@@ -0,0 +1 @@
+fun box1() = "O"

compiler/tests/org/jetbrains/jet/codegen/CodegenTestFiles.java

@@ -27,9 +27,10 @@ import org.jetbrains.jet.lang.resolve.name.Name;
 import org.jetbrains.jet.lang.types.ref.JetTypeName;
 import org.jetbrains.jet.parsing.JetParsingTest;
 
-import java.io.File;
 import java.io.IOException;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -95,7 +96,7 @@ public class CodegenTestFiles {
             try {
                 String content = JetTestUtils.doLoadFile(JetParsingTest.getTestDataDir() + "/codegen/", name);
                 int i = name.lastIndexOf('/');
-                name = name.substring(i+1);
+                //name = name.substring(i+1);
                 JetFile file = JetTestUtils.createFile(name, content, project);
                 files.add(file);
             } catch (IOException e) {

compiler/tests/org/jetbrains/jet/codegen/MultiFileGenTest.java

@@ -37,4 +37,8 @@ public class MultiFileGenTest extends CodegenTestCase {
     public void testNestedPackagesVisibility() {
         blackBoxMultiFile("/multi/nestedPackages/box.kt", "/multi/nestedPackages/a.kt");
     }
+
+    public void testSameNames() {
+        blackBoxMultiFile("/multi/same/1/box.kt", "/multi/same/2/box.kt");
+    }
 }