Fix output parse

backend.native/tests/build.gradle

@@ -2237,8 +2237,8 @@ task multiargs(type: RunStandaloneKonanTest) {
     arguments = ["AAA", "BB", "C"]
     multiRuns = true
     multiArguments = [["1", "2", "3"], ["---"], ["Hello", "world"]]
-    goldValue = "AAA\nBB\nC\n1\n2\n3" +
+    goldValue = "AAA\nBB\nC\n1\n2\n3\n" +
-            "AAA\nBB\nC\n---" +
+            "AAA\nBB\nC\n---\n" +
             "AAA\nBB\nC\nHello\nworld\n"
     source = "runtime/basic/args0.kt"
 }

buildSrc/plugins/src/main/groovy/org/jetbrains/kotlin/KonanTest.groovy

@@ -287,7 +287,6 @@ abstract class KonanTest extends JavaExec {
 
         def times = multiRuns ? multiArguments.size() : 1
 
-        def result = compilerMessagesText
         def exitCodeMismatch = false
         for (int i = 0; i < times; i++) {
             ExecResult execResult = project.execute {
@@ -307,9 +306,6 @@ abstract class KonanTest extends JavaExec {
 
                 ignoreExitValue = true
             }
-            def currentResult = out.toString("UTF-8")
-            println(currentResult)
-            result += currentResult
 
             exitCodeMismatch |= execResult.exitValue != expectedExitStatus
             if (exitCodeMismatch) {
@@ -317,11 +313,12 @@ abstract class KonanTest extends JavaExec {
                 if (this.expectedFail) {
                     println("Expected failure. $message")
                 } else {
-                    throw new TestFailedException("Test failed on iteration $i. $message")
+                    throw new TestFailedException("Test failed on iteration $i. $message\n ${out.toString("UTF-8")}")
                 }
             }
         }
-
+        def result = compilerMessagesText + out.toString("UTF-8")
+        println(result)
         result = result.replace(System.lineSeparator(), "\n")
         def goldValueMismatch = !outputChecker.apply(result)
         if (goldValueMismatch) {