Debugger: check that file isn't shorter than breakpoint line (ex. after deleting some lines in file during debug)

idea/src/org/jetbrains/kotlin/idea/debugger/evaluate/KotlinEvaluationBuilder.kt

@@ -30,6 +30,7 @@ import com.intellij.openapi.progress.ProcessCanceledException
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.vfs.CharsetToolkit
 import com.intellij.psi.JavaPsiFacade
+import com.intellij.psi.PsiDocumentManager
 import com.intellij.psi.PsiElement
 import com.intellij.psi.PsiFileFactory
 import com.intellij.psi.impl.PsiFileFactoryImpl
@@ -101,6 +102,13 @@ object KotlinEvaluationBuilder: EvaluatorBuilder {
             throw EvaluateExceptionUtil.createEvaluateException("Couldn't evaluate kotlin expression at $position")
         }
 
+        val document = PsiDocumentManager.getInstance(file.getProject()).getDocument(file)
+        if (document == null || document.getLineCount() < position.getLine()) {
+            throw EvaluateExceptionUtil.createEvaluateException(
+                    "Couldn't evaluate kotlin expression: breakpoint is placed outside the file. " +
+                    "It may happen when you've changed source file after starting a debug process.")
+        }
+
         if (codeFragment.getContext() !is JetElement) {
             val attachments = arrayOf(attachmentByPsiFile(position.getFile()),
                                       attachmentByPsiFile(codeFragment),