Summary should explain everything, if not look at the screenshots.
Code analysis by @unknown can be found in this comment.
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Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.
Note: this is a automatic message, so apologies if I miss something.

Is this still a concern in the current Minecraft version 1.7.4 / Launcher version 1.3.8 or later? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.

Confirmed for
14w31a because MC-64700 describes this bug in 14w31a
Minecraft 1.8-pre 1
confirmed for 1.8.2 pre1
Yes

@unknown, you, as the reporter of the bug, can add the affected version yourself
Confirmed for 17w13b
Can confirm for release 1.12
Merged into MC-120986.
Confirmed.