Compound assignment between boxed types results in LLVM assertion failure

[brson]

The following code

auto x = @10;
x += @20;

fails with "rustc: Instructions.cpp:1567: void llvm::BinaryOperator::init(llvm::Instruction::BinaryOps): Assertion `getType()->isIntOrIntVectorTy() && "Tried to create an integer operation on a non-integer type!"' failed."

This is probably because the typechecking code for binary operations is shared with that for compound assignment statements, but binary operations autoderef while assignment doesn't.

Not sure what is supposed to happen. Maybe this just shouldn't be allowed.

[eholk]

To me this looks like you're trying to do pointer arithmetic, which should not be allowed, in my opinion.

[msullivan]

It looks like this has been closed...