Scripting: report error on duplicate import

#KT-48177 fixed
(due to the path normalization)

libraries/tools/kotlin-main-kts-test/test/org/jetbrains/kotlin/mainKts/test/mainKtsTest.kt

@@ -121,6 +121,12 @@ class MainKtsTest {
         Assert.assertEquals(OUT_FROM_IMPORT_TEST, out)
     }
 
+    @Test
+    fun testDuplicateImportError() {
+        val res = evalFile(File("$TEST_DATA_ROOT/import-duplicate-test.main.kts"))
+        assertFailed("Duplicate imports:", res)
+    }
+
     @Test
     fun testCompilerOptions() {
 

libraries/tools/kotlin-main-kts-test/testData/import-duplicate-test.main.kts

@@ -0,0 +1,5 @@
+
+@file:Import("import-common.main.kts")
+@file:Import("../testData/import-common.main.kts")
+
+sharedVar = sharedVar + 1