[erlang-patches] Fwd: Fix for bsr bug with huge numbers

Lars Hesel Christensen <>
Wed Sep 25 21:06:35 CEST 2013


As this didn't seem to get through the first time, I try again.

Best regards,
Lars

---------- Forwarded message ----------
From: Lars Hesel Christensen <>
Date: 2013/9/24
Subject: Fix for bsr bug with huge numbers
To: 


Thus pull request fixes a bug in the bsr function, which manifests when a
huge number is shifted a huge number of bits to the right. It simply
returns the number unshifted:

1> 1183140560213014108063589658350 bsr
146783911423364576743092537299333564210980159306769991919205685720763064069663027716481187399048043939495935.
1183140560213014108063589658350

The commit messages contain more information.

The pull request is here:

https://github.com/erlang/otp/pull/86

This bug was brought to my attention by Kresten Krab Thorup.

Best regards,
Lars Hesel Christensen
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