Glitch to make unlimited obsidian.

By making a nether portal and lighting the portal while breaking it the user will come back into the over-world in a different portal which can be used to make an unlimited obsidian glitch
What I expected to happen was...:
I was actually trying to preform a glitch that I found was patched when i found this one

What actually happened was...:
Describe what happened here

Steps to Reproduce:
1. build a nether portal.
2.while unlit take a flint and steel and simultaneously left and right click.
3. if done properly when you enter the over-world you will spawn in a different nether portal but the old one will still be there.