I'm getting strange error message from the following code:

ArrayType * arrayType = ArrayType::get(Type::getInt32Ty(ctx), 0);
stack = builder->CreateAlloca(arrayType, 
                              ConstantArray::get(arrayType, 
                                                 std::vector<Constant *>()));

This code compiles fine but it gives me

llvm::Value* getAISize(llvm::LLVMContext&, llvm::Value*): 
Assertion `Amt->getType() == Type::getInt32Ty(Context)
&& "Malloc/Allocation array size is not a 32-bit integer!"' failed.

during execution.

What's interesting, is that I never said of what type array size should be, it was created somewhere inside helper functions. So I naturally see no good reason for assert to be there.

But I must be doing something wrong anyway, can you help me spot the problem? Thanks in advance.

PS. LLVM, as good as it is, lacking documentation tremendously.