LLVM failure compiling borrow

[nikomatsakis]

An LLVM failure results from compiling this program:

use std;
import std::map::hashmap;
import std::map;

fn main() {
    let buggy_map :hashmap<uint, &uint> = hashmap::<uint, &uint>(uint::hash, uint::eq);
    let x = ~1;
    buggy_map.insert(42, x);
}

[jruderman]

Still crashes if I eliminate the "implicit copy" warning, by replacing x in the arg list with

~*x

or

~1

(is there a better way to silence the warning?)

Assertion failed: (getOperand(0)->getType() == cast<PointerType>(getOperand(1)->getType())->getElementType() && "Ptr must be a pointer to Val type!"), function AssertOK, file /Users/jruderman/code/rust/src/llvm/lib/VMCore/Instructions.cpp, line 1062.

[nikomatsakis]

The warning is, I believe, in error. I meant to file a separate bug on that but got distracted. I imagine the cause is the copy mode on insert().

[Dretch]

Replacing x in the argument list with &*x causes the testcase to compile and run.

[catamorphism]

Compiles successfully for me with d2ad028

extern mod std;
use std::map::HashMap;
use std::map;

fn main() {
    let buggy_map :HashMap<uint, &uint> = HashMap::<uint, &uint>();
    let x = ~1;
    buggy_map.insert(42, x);
}

Closing.