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pkg/compiler/lib/src/js_emitter/full_emitter/class_emitter.dart

Index: pkg/compiler/lib/src/js_emitter/full_emitter/class_emitter.dart
diff --git a/pkg/compiler/lib/src/js_emitter/full_emitter/class_emitter.dart b/pkg/compiler/lib/src/js_emitter/full_emitter/class_emitter.dart
index 897bc0f72014d4fcc4d3948b732357c7f39d9c4d..917008c2e818857340dd67d8f854d4b9220b7ffe 100644
--- a/pkg/compiler/lib/src/js_emitter/full_emitter/class_emitter.dart
+++ b/pkg/compiler/lib/src/js_emitter/full_emitter/class_emitter.dart
@@ -339,7 +339,7 @@ class ClassEmitter extends CodeEmitterHelper {
 
     // TODO(herhut): Do not grab statics out of the properties.
     ClassBuilder classProperties =
-        emitter.elementDescriptors[fragment].remove(classElement);
+        emitter.classDescriptors[fragment]?.remove(classElement);
     if (classProperties != null) {
       statics.addAll(classProperties.properties);
     }