Uhmm is that so? Now you mention it I kinda remember something in that regards from when the last patch came out. Yeah I did it occasionally but only in offline games

Which I usually play with buffy I think, which you can't in a game that was launched with no mod.
Yes, the debate came up in the Strategy & Tips Forum because the claim was that the "U" in BUG and BULL stood for "Unaltered," but some of us had seen excess overflow Hammers converted into Gold while others weren't sure what happened.
I checked into it and sure enough, any excess overflow Hammers either disappear or, with BUG + BULL, turn into Gold on a 1-to-1 basis for base Hammers (not final Hammers, where by final Hammers I mean the Hammers received after production multipliers are applied, such as a production modifier for having Stone when building a City Wall).
BUFFY does not use BULL so you don't get Gold when using BUFFY.
What's not clear is whether you are using BUG + BULL or not. BULL really just means replacing the CvGameCoreDLL.dll file with a new version of the file. BULL, however, includes fixes from an unofficial patch, and that "crediting of excess overflow Hammers as Gold" was one of the fixes.
Other functionality from BULL involves seeing the Hidden Modifiers from the SHAM Mod, i.e. "Developing Nations should help each other to catch up" and "A First Impression is a Lasting One." If you see those modifiers on your F4 -> GLANCE screen, then you're using BULL.
I think that the 3.19 patch completely removed excess Hammer overflow turning into Gold. They were trying to change it from "final Hammers turning into Gold" and instead turn it into "base Hammers turning into Gold," but they messed up the fix and made it so that the excess overflow Hammers simply disappear. At least one of the developers later admitted their error but they made no efforts to correct it.
I'm still not positive that using BUG + BULL won't mess up the saved game for other people, but if it won't, then certainly whipping Warriors, particularly when they have 14/15 Hammers already invested in them (and even Chopping into them immediately after whipping but before ending the turn) is a possible way (although potentially considered to be exploitish since it's not possible in regulr 3.19 BtS) to make Gold out of Hammers pre-Wealth (and to make Gold out of Forest Chops, since you can't do so using the Wealth build).
However, as exploitish as it might feel, it's not nearly as good as Chopping into a Wonder for Failure Gold if you are either Industrious or have the Wonder's relevant bonus Resource.
Obviously, if you don't have BUG + BULL, don't even consider this tactic, as it would just mean throwing away Hammers.