Use the system path separator character in compiler messages.

Fix for CliTest.

compiler/cli/src/org/jetbrains/jet/cli/common/messages/AnalyzerWithCompilerReport.java

@@ -17,7 +17,6 @@
 package org.jetbrains.jet.cli.common.messages;
 
 import com.intellij.openapi.util.text.StringUtil;
-import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.PsiClass;
 import com.intellij.psi.PsiElement;
 import com.intellij.psi.PsiErrorElement;
@@ -90,8 +89,6 @@ public final class AnalyzerWithCompilerReport {
     private static boolean reportDiagnostic(@NotNull Diagnostic diagnostic, @NotNull MessageCollector messageCollector) {
         if (!diagnostic.isValid()) return false;
         DiagnosticUtils.LineAndColumn lineAndColumn = DiagnosticUtils.getLineAndColumn(diagnostic);
-        VirtualFile virtualFile = diagnostic.getPsiFile().getVirtualFile();
-        String path = virtualFile == null ? null : virtualFile.getPath();
         String render;
         if (diagnostic instanceof MyDiagnostic) {
             render = ((MyDiagnostic)diagnostic).message;
@@ -100,7 +97,7 @@ public final class AnalyzerWithCompilerReport {
             render = DefaultErrorMessages.RENDERER.render(diagnostic);
         }
         messageCollector.report(convertSeverity(diagnostic.getSeverity()), render,
-                CompilerMessageLocation.create(path, lineAndColumn.getLine(), lineAndColumn.getColumn()));
+                MessageUtil.psiFileToMessageLocation(diagnostic.getPsiFile(), null, lineAndColumn.getLine(), lineAndColumn.getColumn()));
         return diagnostic.getSeverity() == Severity.ERROR;
     }
 

compiler/cli/src/org/jetbrains/jet/cli/common/messages/MessageUtil.java

@@ -17,11 +17,16 @@
 package org.jetbrains.jet.cli.common.messages;
 
 import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.openapi.vfs.impl.jar.CoreJarVirtualFile;
+import com.intellij.openapi.vfs.local.CoreLocalVirtualFile;
 import com.intellij.psi.PsiElement;
 import com.intellij.psi.PsiFile;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 import org.jetbrains.jet.lang.diagnostics.DiagnosticUtils;
 
+import static com.intellij.openapi.util.io.FileUtil.toSystemDependentName;
+
 public class MessageUtil {
     private MessageUtil() {}
 
@@ -29,8 +34,23 @@ public class MessageUtil {
     public static CompilerMessageLocation psiElementToMessageLocation(@NotNull PsiElement element) {
         PsiFile file = element.getContainingFile();
         DiagnosticUtils.LineAndColumn lineAndColumn = DiagnosticUtils.getLineAndColumnInPsiFile(file, element.getTextRange());
+        return psiFileToMessageLocation(file, "<no path>", lineAndColumn.getLine(), lineAndColumn.getColumn());
+    }
+
+    @NotNull
+    public static CompilerMessageLocation psiFileToMessageLocation(@NotNull PsiFile file, @Nullable String defaultValue, int line, int column) {
+        String path;
         VirtualFile virtualFile = file.getVirtualFile();
-        String path = virtualFile == null ? "<no path>" : virtualFile.getPath();
+        if (virtualFile == null) {
-        return CompilerMessageLocation.create(path, lineAndColumn.getLine(), lineAndColumn.getColumn());
+            path = defaultValue;
+        }
+        else {
+            path = virtualFile.getPath();
+            // Convert path to platform-dependent format when virtualFile is local file.
+            if (virtualFile instanceof CoreLocalVirtualFile || virtualFile instanceof CoreJarVirtualFile) {
+                path = toSystemDependentName(path);
+            }
+        }
+        return CompilerMessageLocation.create(path, line, column);
     }
 }