Fix hashtable memory leak

[Jonathan Wakely]

On 28/11/18 07:36 +0100, François Dumont wrote:
>On 11/27/18 11:00 PM, Jonathan Wakely wrote:
>>On 27/11/18 22:31 +0100, François Dumont wrote:
>>>I eventually called the new method _M_assign_elements.
>>
>>Perfect.
>>
>>>And yes, tracker_allocator was enough.
>>
>>Great.
>>
>>>Committed on trunk for the moment.
>>
>>Great, thanks.
>>
>>Please note that GCC 7.4 RC1 is scheduled for this week:
>>https://gcc.gnu.org/ml/gcc/2018-11/msg00118.html
>>
>>Will you be able to backport the simpler patch (without the
>>refactoring to remove code duplication) to the branch before then?
>>
>>If not I can take care of it.
>>
>>
>>
>I just backport to gcc-7/8-branch the same patch.

Thanks!