Libraries call fails, e-pm 212

epm.yaml

##########
# LibReturnTest
jobs:

- name: ReturnerLib
  job:
    deploy:
      contract: LibReturnerTest.sol
      instance: Returner
      wait: true

- name: ReturnerTest
  job:
    deploy:
      contract: LibReturnerTest.sol
      instance: ReturnerTest
      libraries: Returner:$ReturnerLib
      wait: true

- name: insert
  job:
    call:
      destination: $ReturnerTest
      data: insert
      wait: true

- name: assertReturn
  job:
    assert:
      key: $insert
      relation: eq
      val: 1

LibReturnerTest.sol

library Returner {
	// Struct definitions used in Jan's Mappings library
    struct B32AddressMap {
        mapping (bytes32 => AddressElement) rows;
    }

    struct AddressElement {
        address value;
    }

	// Does not return
    // Insert function definition used in Jan's Mappings library
    function insert(B32AddressMap storage _map, bytes32 _key, address _value) returns (uint)
    {
        // Here is the line that freaks out:
        _map.rows[_key].value = _value;
  		return 1;
    }
}


contract ReturnerTest {
	bytes32 constant KEY = "key";
	bytes32 constant LOCAL_KEY = "local_key";
	Returner.B32AddressMap b32AMap;

	// Does not return
	function insert() returns (uint) {
        // Done locally within this contract the following is fine:
        b32AMap.rows[LOCAL_KEY].value = msg.sender;
        // Done via a library call the execution fails:
		return Returner.insert(b32AMap, KEY, msg.sender);		
	}
}