how to debug memory errors

[Steven Schveighoffer via Digitalmars-d-learn]

On 11/8/16 6:26 AM, bachmeier wrote:
> On Monday, 7 November 2016 at 02:22:35 UTC, Steven Schveighoffer wrote:
>> Imagine a resource wrapper like so:
>>
>> class Foo
>> {
>>    int *mem;
>>    this() { mem = cast(int *)malloc(int.sizeof); }
>>    ~this() { .free(mem); }
>> }
>>
>> Now, you have a problem if you do something like this:
>>
>> class Bar
>> {
>>    Foo foo;
>>    ~this() { delete foo; }
>> }
>>
>
> Is there a valid use case for something like this? Why would you want to
> do anything inside ~this with GC memory?

Indeed, you should not. I'm saying this type of error can explain the 
observed behavior.

The original post I responded to said "I don't know if the double free 
problem is related to this."

-Steve