Execution hangs indefinitely when trying to access QR factor

General Usage
1

The Qr factorization of an NXL matrix does not produce a NXL orthogonal matrix Q but an NXN matrix. When I try to access the first L columns, the execution hangs indefinitely.

using ArnoldiMethod;
using LinearAlgebra;
L = 200; N = 5000; Y = rand(N,L);
(Qc,Rc) = ArnoldiMethod.qr(Y);
Q = Qc[:,1:L];

At this point the execution hangs indefinitely.