--- old/src/hotspot/share/interpreter/linkResolver.cpp	2020-03-06 00:25:51.869494254 -0500
+++ new/src/hotspot/share/interpreter/linkResolver.cpp	2020-03-06 00:25:50.704481549 -0500
@@ -579,24 +579,51 @@
                                                      sel_klass,
                                                      flags,
                                                      true, false, CHECK);
-  // Any existing exceptions that may have been thrown, for example LinkageErrors
-  // from nest-host resolution, have been allowed to propagate.
+  // Any existing exceptions that may have been thrown
+  // have been allowed to propagate.
   if (!can_access) {
     ResourceMark rm(THREAD);
+    stringStream ss;
     bool same_module = (sel_klass->module() == ref_klass->module());
-    Exceptions::fthrow(
-      THREAD_AND_LOCATION,
-      vmSymbols::java_lang_IllegalAccessError(),
-      "class %s tried to access %s%s%smethod '%s' (%s%s%s)",
-      ref_klass->external_name(),
-      sel_method->is_abstract()  ? "abstract "  : "",
-      sel_method->is_protected() ? "protected " : "",
-      sel_method->is_private()   ? "private "   : "",
-      sel_method->external_name(),
-      (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
-      (same_module) ? "" : "; ",
-      (same_module) ? "" : sel_klass->class_in_module_of_loader()
-    );
+    ss.print("class %s tried to access %s%s%smethod '%s' (%s%s%s)",
+             ref_klass->external_name(),
+             sel_method->is_abstract()  ? "abstract "  : "",
+             sel_method->is_protected() ? "protected " : "",
+             sel_method->is_private()   ? "private "   : "",
+             sel_method->external_name(),
+             (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
+             (same_module) ? "" : "; ",
+             (same_module) ? "" : sel_klass->class_in_module_of_loader()
+             );
+
+    // For private access check if there was a problem with nest host
+    // resolution, and if so report that as part of the message.
+    if (sel_method->is_private()) {
+      assert(ref_klass->is_instance_klass(), "must be");
+      assert(sel_klass->is_instance_klass(), "must be");
+      InstanceKlass* ref_ik = InstanceKlass::cast(ref_klass);
+      InstanceKlass* sel_ik = InstanceKlass::cast(sel_klass);
+      const char* nest_host_error_1 = ref_ik->nest_host_resolution_error();
+      const char* nest_host_error_2 = sel_ik->nest_host_resolution_error();
+      if (nest_host_error_1 != NULL || nest_host_error_2 != NULL) {
+        ss.print("(");
+        if (nest_host_error_1 != NULL) {
+          ss.print("%s", nest_host_error_1);
+          if (nest_host_error_2 != NULL) {
+            ss.print(", %s", nest_host_error_2);
+          }
+        } else if (nest_host_error_2 != NULL) {
+          ss.print("%s", nest_host_error_2);
+        }
+        ss.print(")");
+      }
+    }
+
+    Exceptions::fthrow(THREAD_AND_LOCATION,
+                       vmSymbols::java_lang_IllegalAccessError(),
+                       "%s",
+                       ss.as_string()
+                       );
     return;
   }
 }
@@ -915,19 +942,44 @@
   if (!can_access) {
     bool same_module = (sel_klass->module() == ref_klass->module());
     ResourceMark rm(THREAD);
-    Exceptions::fthrow(
-      THREAD_AND_LOCATION,
-      vmSymbols::java_lang_IllegalAccessError(),
-      "class %s tried to access %s%sfield %s.%s (%s%s%s)",
-      ref_klass->external_name(),
-      fd.is_protected() ? "protected " : "",
-      fd.is_private()   ? "private "   : "",
-      sel_klass->external_name(),
-      fd.name()->as_C_string(),
-      (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
-      (same_module) ? "" : "; ",
-      (same_module) ? "" : sel_klass->class_in_module_of_loader()
-    );
+    stringStream ss;
+    ss.print("class %s tried to access %s%sfield %s.%s (%s%s%s)",
+             ref_klass->external_name(),
+             fd.is_protected() ? "protected " : "",
+             fd.is_private()   ? "private "   : "",
+             sel_klass->external_name(),
+             fd.name()->as_C_string(),
+             (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
+             (same_module) ? "" : "; ",
+             (same_module) ? "" : sel_klass->class_in_module_of_loader()
+             );
+    // For private access check if there was a problem with nest host
+    // resolution, and if so report that as part of the message.
+    if (fd.is_private()) {
+      assert(ref_klass->is_instance_klass(), "must be");
+      assert(sel_klass->is_instance_klass(), "must be");
+      InstanceKlass* ref_ik = InstanceKlass::cast(ref_klass);
+      InstanceKlass* sel_ik = InstanceKlass::cast(sel_klass);
+      const char* nest_host_error_1 = ref_ik->nest_host_resolution_error();
+      const char* nest_host_error_2 = sel_ik->nest_host_resolution_error();
+      if (nest_host_error_1 != NULL || nest_host_error_2 != NULL) {
+        ss.print("(");
+        if (nest_host_error_1 != NULL) {
+          ss.print("%s", nest_host_error_1);
+          if (nest_host_error_2 != NULL) {
+            ss.print(", %s", nest_host_error_2);
+          }
+        } else if (nest_host_error_2 != NULL) {
+          ss.print("%s", nest_host_error_2);
+        }
+        ss.print(")");
+      }
+    }
+    Exceptions::fthrow(THREAD_AND_LOCATION,
+                       vmSymbols::java_lang_IllegalAccessError(),
+                       "%s",
+                       ss.as_string()
+                       );
     return;
   }
 }