Unreachable division causes LLVM assertion error

[klutzy]

fn f(n: u8) {
    panic!();
    let n = n / 1;
}

fn main() {
    f(1);
}

rustc: /home/rustbuild/src/rust-buildbot/slave/nightly-dist-rustc-linux/build/
src/llvm/lib/IR/Constants.cpp:1835:
static llvm::Constant* llvm::ConstantExpr::get(unsigned int, llvm::Constant*, llvm::Constant*, unsigned int, llvm::Type*):
Assertion `C1->getType() == C2->getType() &&
"Operand types in binary constant expression should match"' failed.

Replacing n / 1 with n / n gives:

rustc: /home/rustbuild/src/rust-buildbot/slave/nightly-dist-rustc-linux/build/
src/llvm/lib/IR/Instructions.cpp:1086:
void llvm::StoreInst::AssertOK():
Assertion `getOperand(0)->getType() == cast<PointerType>(getOperand(1)->getType())->getElementType() &&
"Ptr must be a pointer to Val type!"' failed.

[dotdash]

This compiles fine with rustc 1.0.0-dev (48aeaba93 2015-02-28) (built 2015-02-28)