diff --git a/app/src/main/java/com/tyron/code/ui/editor/impl/text/rosemoe/CodeEditorFragment.java b/app/src/main/java/com/tyron/code/ui/editor/impl/text/rosemoe/CodeEditorFragment.java
index 2a77b5c0d..2ad94e7f6 100644
--- a/app/src/main/java/com/tyron/code/ui/editor/impl/text/rosemoe/CodeEditorFragment.java
+++ b/app/src/main/java/com/tyron/code/ui/editor/impl/text/rosemoe/CodeEditorFragment.java
@@ -330,9 +330,12 @@ public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceStat
 
         LogViewModel logViewModel =
                 new ViewModelProvider(requireActivity()).get(LogViewModel.class);
-        mEditor.setDiagnosticsListener(diagnostics ->
-                ProgressManager.getInstance().runLater(() ->
-                        logViewModel.updateLogs(LogViewModel.DEBUG, diagnostics)));
+        mEditor.setDiagnosticsListener(diagnostics -> {
+            for (DiagnosticWrapper diagnostic : diagnostics) {
+                DiagnosticUtil.setLineAndColumn(diagnostic, mEditor);
+            }
+            ProgressManager.getInstance().runLater(() -> logViewModel.updateLogs(LogViewModel.DEBUG, diagnostics));
+        });
 
         getChildFragmentManager().setFragmentResultListener(LayoutEditorFragment.KEY_SAVE,
                 getViewLifecycleOwner(), ((requestKey, result) -> {
diff --git a/app/src/main/java/com/tyron/code/ui/editor/language/AbstractCodeAnalyzer.java b/app/src/main/java/com/tyron/code/ui/editor/language/AbstractCodeAnalyzer.java
index 66068651a..679a0630b 100644
--- a/app/src/main/java/com/tyron/code/ui/editor/language/AbstractCodeAnalyzer.java
+++ b/app/src/main/java/com/tyron/code/ui/editor/language/AbstractCodeAnalyzer.java
@@ -35,14 +35,14 @@ public abstract class AbstractCodeAnalyzer<T> extends DiagnosticAnalyzeManager<T
     private StyleReceiver mReceiver;
     private Token mPreviousToken;
     private Styles mLastStyles;
-    protected final List<DiagnosticWrapper> mDiagnostics = new ArrayList<>();
+    protected List<DiagnosticWrapper> mDiagnostics = new ArrayList<>();
 
     public AbstractCodeAnalyzer() {
         setup();
     }
 
     @Override
-    public void setReceiver(@NonNull StyleReceiver receiver) {
+    public void setReceiver(@Nullable StyleReceiver receiver) {
         super.setReceiver(receiver);
 
         mReceiver = receiver;
@@ -99,8 +99,7 @@ public void reset(@NonNull ContentReference content, @NonNull Bundle extraArgume
 
     @Override
     public void setDiagnostics(Editor editor, List<DiagnosticWrapper> diagnostics) {
-        mDiagnostics.clear();
-        mDiagnostics.addAll(diagnostics);
+        mDiagnostics = diagnostics;
     }
 
     public void setup() {
diff --git a/app/src/main/java/com/tyron/code/ui/editor/language/kotlin/KotlinAnalyzer.java b/app/src/main/java/com/tyron/code/ui/editor/language/kotlin/KotlinAnalyzer.java
index 53a484a82..c11c4777a 100644
--- a/app/src/main/java/com/tyron/code/ui/editor/language/kotlin/KotlinAnalyzer.java
+++ b/app/src/main/java/com/tyron/code/ui/editor/language/kotlin/KotlinAnalyzer.java
@@ -5,6 +5,7 @@
 import com.tyron.builder.project.api.Module;
 import com.tyron.code.ApplicationLoader;
 import com.tyron.code.ui.editor.language.AbstractCodeAnalyzer;
+import com.tyron.code.ui.editor.language.HighlightUtil;
 import com.tyron.code.ui.project.ProjectManager;
 import com.tyron.common.SharedPreferenceKeys;
 import com.tyron.completion.progress.ProgressManager;
@@ -18,6 +19,8 @@
 
 import java.lang.ref.WeakReference;
 
+import io.github.rosemoe.sora.lang.styling.MappedSpans;
+import io.github.rosemoe.sora.lang.styling.Styles;
 import io.github.rosemoe.sora.widget.schemes.EditorColorScheme;
 
 public class KotlinAnalyzer extends AbstractCodeAnalyzer<Object> {
@@ -94,6 +97,16 @@ public void analyzeInBackground(CharSequence content) {
         }
     }
 
+    @Override
+    protected void afterAnalyze(CharSequence content, Styles styles, MappedSpans.Builder colors) {
+        super.afterAnalyze(content, styles, colors);
+
+        Editor editor = mEditorReference.get();
+        if (editor != null) {
+            HighlightUtil.markDiagnostics(editor, mDiagnostics, styles);
+        }
+    }
+
     private static class UnknownToken implements Token {
 
         public static UnknownToken INSTANCE = new UnknownToken();
diff --git a/java-completion/src/main/java/com/tyron/completion/java/util/DiagnosticUtil.java b/java-completion/src/main/java/com/tyron/completion/java/util/DiagnosticUtil.java
index 83a4582ca..a77755502 100644
--- a/java-completion/src/main/java/com/tyron/completion/java/util/DiagnosticUtil.java
+++ b/java-completion/src/main/java/com/tyron/completion/java/util/DiagnosticUtil.java
@@ -6,6 +6,8 @@
 import com.tyron.builder.model.DiagnosticWrapper;
 import com.tyron.completion.java.compiler.CompileTask;
 import com.tyron.completion.java.action.FindMethodDeclarationAt;
+import com.tyron.editor.CharPosition;
+import com.tyron.editor.Editor;
 
 import org.openjdk.javax.lang.model.element.ExecutableElement;
 import org.openjdk.javax.lang.model.element.TypeElement;
@@ -30,6 +32,25 @@ public class DiagnosticUtil {
     private static final Pattern UNREPORTED_EXCEPTION =
             Pattern.compile("unreported exception (" + "(\\w+\\.)*\\w+)");
 
+    public static void setLineAndColumn(DiagnosticWrapper diagnostic, Editor editor) {
+        try {
+            if (diagnostic.getStartLine() <= -1 && diagnostic.getStartPosition() > 0) {
+                CharPosition start = editor.getCharPosition(((int) diagnostic.getStartPosition()));
+                diagnostic.setStartLine(start.getLine() + 1);
+                diagnostic.setStartColumn(start.getColumn());
+                diagnostic.setLineNumber(start.getLine() + 1);
+                diagnostic.setColumnNumber(start.getColumn());
+            }
+            if (diagnostic.getEndLine() <= -1 && diagnostic.getEndPosition() > 0) {
+                CharPosition end = editor.getCharPosition(((int) diagnostic.getEndPosition()));
+                diagnostic.setEndLine(end.getLine() + 1);
+                diagnostic.setEndColumn(end.getColumn());
+            }
+        } catch (IndexOutOfBoundsException ignored) {
+            // unknown index, dont display line number
+        }
+    }
+
     public static class MethodPtr {
         public String className, methodName;
         public String[] erasedParameterTypes;
diff --git a/kotlin-completion/src/main/java/com/tyron/kotlin_completion/diagnostic/ConvertDiagnostic.kt b/kotlin-completion/src/main/java/com/tyron/kotlin_completion/diagnostic/ConvertDiagnostic.kt
index 44652f483..c8fb5070c 100644
--- a/kotlin-completion/src/main/java/com/tyron/kotlin_completion/diagnostic/ConvertDiagnostic.kt
+++ b/kotlin-completion/src/main/java/com/tyron/kotlin_completion/diagnostic/ConvertDiagnostic.kt
@@ -18,7 +18,11 @@ fun convertDiagnostic(diagnostic: KotlinDiagnostic): List<DiagnosticWrapper> {
         wrapper.kind = severity(diagnostic.severity)
         wrapper.source = File(diagnostic.psiFile.viewProvider.virtualFile
             .path)
-        wrapper.position = -1L
+        wrapper.startLine = -1
+        wrapper.startColumn = -1
+        wrapper.endLine = -1
+        wrapper.endColumn = -1
+        wrapper.position = it.startOffset.toLong()
         wrapper.startPosition = it.startOffset.toLong()
         wrapper.endPosition = it.endOffset.toLong()
         wrapper