8025088: Missing cases for JVM_CONSTANT_MethodHandleInError cause crash if debugger steps into error-tagged method handle
Summary: Need to refetch each method from InstanceKlass after all safepoints. Removed leaky PreviousVersionInfo code.
Reviewed-by: coleenp, sspitsyn
7133122: SA throws sun.jvm.hotspot.debugger.UnmappedAddressException when it should not
Summary: replace PT_LOAD segment with library segment when necessary
Reviewed-by: dholmes, sla