The cache in moduleByClassLoader.kt contains weak references to instances of
RuntimeModuleData. However, prior to this change no one else had any _strong_
reference to the corresponding RuntimeModuleData: KClassImpl depends on the
ModuleDescriptor almost directly. Therefore the weak references were sometimes
garbage collected and a new module was constructed for a new reflection object,
which resulted in broken equality between two reflection objects.
No test added because it was rather hard to come up with (and, more
importantly, to support) a test case.
Alexander Udalov
d2ef040bcb