2 files changed, 64 insertions, 0 deletions

diff --git a/src/test/WixToolsetTest.CoreIntegration/DirectoryFixture.cs b/src/test/WixToolsetTest.CoreIntegration/DirectoryFixture.cs
index 83f2f2bb..2d6e4802 100644
--- a/src/test/WixToolsetTest.CoreIntegration/DirectoryFixture.cs
+++ b/src/test/WixToolsetTest.CoreIntegration/DirectoryFixture.cs
@@ -85,5 +85,44 @@ namespace WixToolsetTest.CoreIntegration
                 }, dirSymbols.Select(d => d.Id.Id).ToArray());
             }
         }
+
+        [Fact]
+        public void CanGetDuplicateDir()
+        {
+            var folder = TestData.Get(@"TestData");
+
+            using (var fs = new DisposableFileSystem())
+            {
+                var baseFolder = fs.GetFolder();
+                var intermediateFolder = Path.Combine(baseFolder, "obj");
+                var msiPath = Path.Combine(baseFolder, @"bin\test.msi");
+
+                var result = WixRunner.Execute(new[]
+                {
+                    "build",
+                    "-arch", "x64",
+                    Path.Combine(folder, "DuplicateDir", "DuplicateDir.wxs"),
+                    Path.Combine(folder, "ProductWithComponentGroupRef", "Product.wxs"),
+                    "-bindpath", Path.Combine(folder, "SingleFile", "data"),
+                    "-intermediateFolder", intermediateFolder,
+                    "-o", msiPath
+                });
+
+                result.AssertSuccess();
+
+                var intermediate = Intermediate.Load(Path.Combine(baseFolder, @"bin\test.wixpdb"));
+                var section = intermediate.Sections.Single();
+
+                var dirSymbols = section.Symbols.OfType<WixToolset.Data.Symbols.DirectorySymbol>().ToList();
+                Assert.Equal(new[]
+                {
+                    "dirZsSsu81KcG46xXTwc4mTSZO5Zx4",
+                    "INSTALLFOLDER",
+                    "ProgramFiles6432Folder",
+                    "ProgramFiles64Folder",
+                    "TARGETDIR"
+                }, dirSymbols.Select(d => d.Id.Id).ToArray());
+            }
+        }
     }
 }
diff --git a/src/test/WixToolsetTest.CoreIntegration/TestData/DuplicateDir/DuplicateDir.wxs b/src/test/WixToolsetTest.CoreIntegration/TestData/DuplicateDir/DuplicateDir.wxs
new file mode 100644
index 00000000..ffee969d
--- /dev/null
+++ b/src/test/WixToolsetTest.CoreIntegration/TestData/DuplicateDir/DuplicateDir.wxs
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs">
+    <Fragment>
+        <ComponentGroup Id="ProductComponents">
+            <ComponentGroupRef Id="GroupA" />
+            <ComponentGroupRef Id="GroupB" />
+        </ComponentGroup>
+    </Fragment>
+
+    <Fragment>
+        <ComponentGroup Id="GroupA" Directory="INSTALLFOLDER:\dupe">
+            <Component>
+                <File Name="a.txt" Source="test.txt" />
+            </Component>
+        </ComponentGroup>
+    </Fragment>
+
+    <Fragment>
+        <ComponentGroup Id="GroupB" Directory="INSTALLFOLDER:\dupe">
+            <Component>
+                <File Name="b.txt" Source="test.txt" />
+            </Component>
+        </ComponentGroup>
+    </Fragment>
+</Wix>