Additional information to catch EA-75872

compiler/frontend.java/src/org/jetbrains/kotlin/resolve/jvm/diagnostics/DefaultErrorMessagesJvm.java

@@ -50,7 +50,7 @@ public class DefaultErrorMessagesJvm implements DefaultErrorMessages.Extension {
         }
     };
 
-    public static final DiagnosticFactoryToRendererMap MAP = new DiagnosticFactoryToRendererMap();
+    public static final DiagnosticFactoryToRendererMap MAP = new DiagnosticFactoryToRendererMap("JVM");
     static {
         MAP.put(ErrorsJvm.CONFLICTING_JVM_DECLARATIONS, "Platform declaration clash: {0}", CONFLICTING_JVM_DECLARATIONS_DATA);
         MAP.put(ErrorsJvm.ACCIDENTAL_OVERRIDE, "Accidental override: {0}", CONFLICTING_JVM_DECLARATIONS_DATA);

compiler/frontend/src/org/jetbrains/kotlin/diagnostics/rendering/DefaultErrorMessages.java

@@ -55,7 +55,7 @@ public class DefaultErrorMessages {
         DiagnosticFactoryToRendererMap getMap();
     }
 
-    private static final DiagnosticFactoryToRendererMap MAP = new DiagnosticFactoryToRendererMap();
+    private static final DiagnosticFactoryToRendererMap MAP = new DiagnosticFactoryToRendererMap("Default");
     private static final MappedExtensionProvider<Extension, List<DiagnosticFactoryToRendererMap>> RENDERER_MAPS = MappedExtensionProvider.create(
             Extension.EP_NAME,
             new Function1<List<? extends Extension>, List<DiagnosticFactoryToRendererMap>>() {
@@ -79,7 +79,8 @@ public class DefaultErrorMessages {
                 return renderer.render(diagnostic);
             }
         }
-        throw new IllegalArgumentException("Don't know how to render diagnostic of type " + diagnostic.getFactory().getName());
+        throw new IllegalArgumentException("Don't know how to render diagnostic of type " + diagnostic.getFactory().getName() +
+                                           " with the following renderer maps: " + RENDERER_MAPS.get());
     }
 
     @TestOnly

compiler/frontend/src/org/jetbrains/kotlin/diagnostics/rendering/DiagnosticFactoryToRendererMap.java

@@ -30,6 +30,20 @@ public final class DiagnosticFactoryToRendererMap {
     private final Map<DiagnosticFactory<?>, DiagnosticRenderer<?>> map = new HashMap<DiagnosticFactory<?>, DiagnosticRenderer<?>>();
     private boolean immutable = false;
 
+    // TO catch EA-75872
+    private final String name;
+    public DiagnosticFactoryToRendererMap(String name) {
+        this.name = name;
+    }
+    public DiagnosticFactoryToRendererMap() {
+        this("<unnamed>");
+    }
+    @Override
+    public String toString() {
+        return "DiagnosticFactory#" + name;
+    }
+    //
+
     private void checkMutability() {
         if (immutable) {
             throw new IllegalStateException("factory to renderer map is already immutable");

idea/idea-analysis/src/org/jetbrains/kotlin/idea/highlighter/IdeErrorMessages.java

@@ -43,7 +43,7 @@ import static org.jetbrains.kotlin.resolve.jvm.diagnostics.ErrorsJvm.CONFLICTING
  * @see DefaultErrorMessages
  */
 public class IdeErrorMessages {
-    private static final DiagnosticFactoryToRendererMap MAP = new DiagnosticFactoryToRendererMap();
+    private static final DiagnosticFactoryToRendererMap MAP = new DiagnosticFactoryToRendererMap("IDE");
 
     @NotNull
     public static String render(@NotNull Diagnostic diagnostic) {

js/js.frontend/src/org/jetbrains/kotlin/js/resolve/diagnostics/DefaultErrorMessagesJs.kt

@@ -21,7 +21,7 @@ import org.jetbrains.kotlin.diagnostics.rendering.DiagnosticFactoryToRendererMap
 import org.jetbrains.kotlin.diagnostics.rendering.Renderers
 
 private val DIAGNOSTIC_FACTORY_TO_RENDERER by lazy {
-    with(DiagnosticFactoryToRendererMap()) {
+    with(DiagnosticFactoryToRendererMap("JS")) {
 
         put(ErrorsJs.NATIVE_ANNOTATIONS_ALLOWED_ONLY_ON_MEMBER_OR_EXTENSION_FUN,
             "Annotation ''{0}'' is allowed only on member functions of declaration annotated as ''kotlin.js.native'' or on toplevel extension functions", Renderers.RENDER_TYPE)

plugins/android-compiler-plugin/src/org/jetbrains/kotlin/android/synthetic/diagnostic/DefaultErrorMessagesAndroid.kt

@@ -23,7 +23,7 @@ import org.jetbrains.kotlin.diagnostics.rendering.Renderers
 public class DefaultErrorMessagesAndroid : DefaultErrorMessages.Extension {
 
     private companion object {
-        val MAP = DiagnosticFactoryToRendererMap()
+        val MAP = DiagnosticFactoryToRendererMap("Android")
 
         init {
             MAP.put(ErrorsAndroid.SYNTHETIC_INVALID_WIDGET_TYPE,