REPL: sanitize stack traces

Don't include our compiler's and preloader's internal code, reflection, native
methods etc. Also delete "substring" matching logic from tests

compiler/cli/src/org/jetbrains/jet/cli/jvm/repl/ReplInterpreter.java

@@ -276,7 +276,7 @@ public class ReplInterpreter {
                 scriptInstance = scriptInstanceConstructor.newInstance(constructorArgs);
             }
             catch (Throwable e) {
-                return LineResult.error(Throwables.getStackTraceAsString(e.getCause()));
+                return LineResult.error(renderStackTrace(e.getCause()));
             }
             Field rvField = scriptClass.getDeclaredField("rv");
             rvField.setAccessible(true);
@@ -295,6 +295,27 @@ public class ReplInterpreter {
         }
     }
 
+    @NotNull
+    private static String renderStackTrace(@NotNull Throwable cause) {
+        StackTraceElement[] oldTrace = cause.getStackTrace();
+        List<StackTraceElement> newTrace = new ArrayList<StackTraceElement>();
+        boolean skip = true;
+        for (int i = oldTrace.length - 1; i >= 0; i--) {
+            StackTraceElement element = oldTrace[i];
+            // All our code happens in the script constructor, and no reflection/native code happens in constructors.
+            // So we ignore everything in the stack trace until the first constructor
+            if (element.getMethodName().equals("<init>")) {
+                skip = false;
+            }
+            if (!skip) {
+                newTrace.add(element);
+            }
+        }
+        Collections.reverse(newTrace);
+        cause.setStackTrace(newTrace.toArray(new StackTraceElement[newTrace.size()]));
+        return Throwables.getStackTraceAsString(cause);
+    }
+
     @Nullable
     private ScriptDescriptor doAnalyze(@NotNull JetFile psiFile, @NotNull MessageCollector messageCollector) {
         WritableScope scope = new WritableScopeImpl(

compiler/testData/repl/evaluationErrors.repl

@@ -1,5 +1,11 @@
 >>> throw Exception("hi there")
-substring: Exception: hi there
+java.lang.Exception: hi there
+	at Line1.<init>(Unknown Source)
 >>> fun foo() = 2
 >>> foo()
 2
+>>> fun bar() = throw AssertionError()
+>>> bar()
+java.lang.AssertionError
+	at Line4.bar(Unknown Source)
+	at Line5.<init>(Unknown Source)

compiler/tests/org/jetbrains/jet/repl/AbstractReplInterpreterTest.kt

@@ -30,7 +30,6 @@ import org.junit.Assert
 
 private val START_PATTERN = Pattern.compile(">>>( *)(.*)$")
 private val INCOMPLETE_PATTERN = Pattern.compile("\\.\\.\\.( *)(.*)$")
-private val SUBSTRING_PATTERN = Pattern.compile("substring: (.*)")
 
 private val INCOMPLETE_LINE_MESSAGE = "incomplete line"
 
@@ -39,12 +38,7 @@ public abstract class AbstractReplInterpreterTest : UsefulTestCase() {
         System.setProperty("java.awt.headless", "true")
     }
 
-    private enum class MatchType {
-        EQUALS
-        SUBSTRING
-    }
-
-    private data class OneLine(val code: String, val expected: String, val matchType: MatchType)
+    private data class OneLine(val code: String, val expected: String)
 
     private fun loadLines(file: File): List<OneLine> {
         val lines = ArrayDeque(file.readLines())
@@ -63,16 +57,9 @@ public abstract class AbstractReplInterpreterTest : UsefulTestCase() {
             if (lines.isNotEmpty()) {
                 val nextLine = lines.peek()!!
 
-                val substringMatcher = SUBSTRING_PATTERN.matcher(nextLine)
-                if (substringMatcher.matches()) {
-                    result.add(OneLine(code, substringMatcher.group(1)!!, MatchType.SUBSTRING))
-                    lines.poll()
-                    continue
-                }
-
                 val incompleteMatcher = INCOMPLETE_PATTERN.matcher(nextLine)
                 if (incompleteMatcher.matches()) {
-                    result.add(OneLine(code, INCOMPLETE_LINE_MESSAGE, MatchType.EQUALS))
+                    result.add(OneLine(code, INCOMPLETE_LINE_MESSAGE))
                     continue
                 }
             }
@@ -82,7 +69,7 @@ public abstract class AbstractReplInterpreterTest : UsefulTestCase() {
                 value.appendln(lines.poll()!!)
             }
 
-            result.add(OneLine(code, value.toString(), MatchType.EQUALS))
+            result.add(OneLine(code, value.toString()))
         }
 
         return result
@@ -92,26 +79,19 @@ public abstract class AbstractReplInterpreterTest : UsefulTestCase() {
         val configuration = JetTestUtils.compilerConfigurationForTests(ConfigurationKind.ALL, TestJdkKind.FULL_JDK)
         val repl = ReplInterpreter(getTestRootDisposable()!!, configuration)
 
-        for ((code, expected, matchType) in loadLines(File(path))) {
-            val expectedString = StringUtil.convertLineSeparators(expected).replaceFirst("\n$", "")
-
+        for ((code, expected) in loadLines(File(path))) {
             val lineResult = repl.eval(code)
             val actual = when (lineResult.getType()) {
                 ReplInterpreter.LineResultType.SUCCESS -> lineResult.getValue()?.toString() ?: ""
                 ReplInterpreter.LineResultType.ERROR -> lineResult.getErrorText()
                 ReplInterpreter.LineResultType.INCOMPLETE -> INCOMPLETE_LINE_MESSAGE
             }
-            val actualString = StringUtil.convertLineSeparators(actual).replaceFirst("\n$", "")
 
-            when (matchType) {
-                MatchType.EQUALS -> {
-                    Assert.assertEquals("After evaluation of: $code", expectedString, actualString)
-                }
-                MatchType.SUBSTRING -> {
-                    Assert.assertTrue("Evaluated result must contain substring: $expectedString, actual: $actualString, line: $code",
-                                      expectedString in actualString)
-                }
-            }
+            Assert.assertEquals(
+                    "After evaluation of: $code",
+                    StringUtil.convertLineSeparators(expected).replaceFirst("\n$", ""),
+                    StringUtil.convertLineSeparators(actual).replaceFirst("\n$", "")
+            )
         }
     }
 }