diff -r ad9fa99fa48e -r 532e88de77eb src/hotspot/share/oops/constantPool.cpp
--- a/src/hotspot/share/oops/constantPool.cpp	Thu Apr 04 17:23:05 2019 -0400
+++ b/src/hotspot/share/oops/constantPool.cpp	Thu Apr 04 09:39:44 2019 +0200
@@ -1000,14 +1000,17 @@
       if ((callee->is_interface() && m_tag.is_method()) ||
           ((!callee->is_interface() && m_tag.is_interface_method()))) {
         ResourceMark rm(THREAD);
-        char buf[400];
-        jio_snprintf(buf, sizeof(buf),
-          "Inconsistent constant pool data in classfile for class %s. "
-          "Method %s%s at index %d is %s and should be %s",
-          callee->name()->as_C_string(), name->as_C_string(), signature->as_C_string(), index,
-          callee->is_interface() ? "CONSTANT_MethodRef" : "CONSTANT_InterfaceMethodRef",
-          callee->is_interface() ? "CONSTANT_InterfaceMethodRef" : "CONSTANT_MethodRef");
-        THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
+        stringStream ss;
+        ss.print("Inconsistent constant pool data in classfile for class %s. "
+                 "Method '", callee->name()->as_C_string());
+        signature->print_as_signature_external_return_type(&ss);
+        ss.print(" %s(", name->as_C_string());
+        signature->print_as_signature_external_parameters(&ss);
+        ss.print(")' at index %d is %s and should be %s",
+                 index,
+                 callee->is_interface() ? "CONSTANT_MethodRef" : "CONSTANT_InterfaceMethodRef",
+                 callee->is_interface() ? "CONSTANT_InterfaceMethodRef" : "CONSTANT_MethodRef");
+        THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
       }
 
       Klass* klass = this_cp->pool_holder();