一个诡异的错误

280259078

function M_3D_act takes nothing returns nothing
    local unit u1 = GetEnumUnit()
    local location a1 = GetUnitLoc(u1)
    local location b1 = udg_L_Master3D
    local real x1 = DistanceBetweenPoints( b1 , a1 )
    local real x2 = AngleBetweenPoints ( a1 , b1 )
    local location c1 = PolarProjectionBJ( a1 , x1 - 18, x2 )
    call SetUnitPositionLocFacingBJ( u1, c1, x2 )
    call CreateNUnitsAtLoc( 1, 'uabo', Player(11), GetUnitLoc(u1), bj_UNIT_FACING )
    call RemoveLocation( a1 )
    call RemoveLocation( b1 )
    call RemoveLocation( c1 )
    set a1 = null
    set b1 = null
    set c1 = null
    set u1 = null
endfunction

调用后可能导致崩溃