BinaryHeap crashes upon insertion if heapified with an array of length 1?

[Michael Coulombe via Digitalmars-d-learn]

On Sunday, 9 April 2017 at 00:36:00 UTC, TheGag96 wrote:
> I'm trying to use a binary heap initialized with one element. 
> However, this always seems to cause a range violation for some 
> reason. This small example will do it:
>
> import std.stdio, std.container;
>
> void main() {
>   auto pq = heapify([5]);
>   pq.insert(8);
> }
>
> ...And it produces this error: https://pastebin.com/dyLNRz2W
>
> Oddly enough, if I heapify an array with any other length than 
> 1, I can insert as much as I want (that includes an empty 
> array!). Is this a bug in Phobos or some odd expected behavior? 
> Thanks guys!

This is a bug in the insert method. I created a bug report for 
you and submitted a pull request for a fix:

https://issues.dlang.org/show_bug.cgi?id=17314