bug#31688: 26.1.50; Byte compiler confuses two string variables

[Phil Sainty]

On 2018-06-03 11:54, Noam Postavsky wrote:
> What, you don't like optimization? ;)

I generally dislike it when byte-compiled and interpreted code
give different results.

Offhand I'm struggling to imagine there being really significant
benefits to this optimisation; whereas I can easily imagine that
any bugs on this account, while no doubt unlikely, could be
amazingly painful to track down if the bug only occurred in byte-
compiled code, and instrumenting the function for debugging
simply made the bug go away.