src/aggregate.d

@@ -313,6 +313,9 @@ public:
         foreach (i; 0 .. nfields)
         {
             auto vd = fields[i];
+            if (vd.errors)
+                continue;
+
             auto vx = vd;
             if (vd._init && vd._init.isVoidInitializer())
                 vx = null;

test/fail_compilation/diag15340.d

@@ -0,0 +1,13 @@
+/*
+TEST_OUTPUT:
+---
+fail_compilation/diag15340.d(11): Error: undefined identifier 'undef1'
+fail_compilation/diag15340.d(12): Error: undefined identifier 'undef2'
+---
+*/
+
+class C
+{
+    auto a = undef1;
+    auto b = undef2;
+}