While running my application with a fastdebug build, I see an assertion failure:

```
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (<redacted>/src/hotspot/share/interpreter/bytecodeUtils.cpp:660), pid=12677, tid=12678
# assert(false) failed: Unexpected tag
#
# JRE version: OpenJDK Runtime Environment 1.0.1973.0 (17.0.12+6) (fastdebug build 17.0.12+6-LTS)
# Java VM: OpenJDK 64-Bit Server VM 1.0.1973.0 (fastdebug 17.0.12+6-LTS, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, g1 gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0x73b2d8] ExceptionMessageBuilder::do_instruction(int)+0x2858
```
with stack:
```
V [libjvm.so+0x73b2d8] ExceptionMessageBuilder::do_instruction(int)+0x2858
V [libjvm.so+0x73b591] ExceptionMessageBuilder::ExceptionMessageBuilder(Method*, int)+0x251
V [libjvm.so+0x73de94] BytecodeUtils::get_NPE_message_at(outputStream*, Method*, int)+0x134
V [libjvm.so+0x10bf625] JVM_GetExtendedNPEMessage+0x135
j java.lang.NullPointerException.getExtendedNPEMessage()Ljava/lang/String;+0 java.base@17.0.12
j java.lang.NullPointerException.getMessage()Ljava/lang/String;+23 java.base@17.0.12
```


It seems that https://github.com/openjdk/jdk/blob/master/src/hotspot/share/interpreter/bytecodeUtils.cpp#L646-L660 does not handle `CONSTANT_Dynamic` for the `ldc` instruction, even though https://openjdk.org/jeps/309 says:

> Dynamic constants must be usable in any context which currently allows general constant pool constants, such as CONSTANT_String and CONSTANT_MethodType. Thus, they must be valid operands to the ldc instruction and must be allowed as static parameters to bootstrap methods.

I'm not sure if there's a reason this is not permitted (my application uses Kotlin and Jacoco so there could be some unusual bytecode generated), or if it's just an omission. I see that `ConstantPool::constant_tag_at` looks like it would be suitable for finding the underlying type of the dynamic constant.