[MC-209001] Typing seed 0 no longer generates a random seed

The bug

If you put 0 in the seed box where you type the seed, the seed will always be 48 instead of a random seed. It looks like this issue has been introduced with the fix for MC-183786.

How to reproduce

Create a new world
Go to the "More World Options" screen
Type "0" in the seed field
Create the world
Run /seed
→ ❌ Notice how the seed is 48 and not a random value

Notes

The 0 turning into 48 in codes of customized worlds is MC-184634.

Linked issues

relates to 2

MC-184634 Worldgen setting with seed 0 is interpreted as an ASCII code Resolved

MC-183786 Named seeds that are not numbers are not being recognized Resolved

Comments 12

Nickid2018 2020-12-19T16:03:58Z

This should be because the seed text box parses "0" into a string instead of a number. Because the hash code value of the string "0" is 48.

Chungui23 2020-12-19T16:04:59Z

I'm pretty sure this happens due to seed 0 is not a valid seed, therefore, your report is likely to be closed as invalid by a mod.

W_V 2020-12-19T16:53:31Z

This seed used to generate a random seed. See MC-44944 for more info.

Nickid2018 2020-12-19T17:25:44Z

Can confirmed in 20w51a and 1.16.4

Nickid2018 2020-12-19T17:46:57Z

I can confirm that all versions after fixing MC-183786 in 20w21a parse "0" into 48, while all previous versions parse it into a random seed

2 more comments

Nickid2018 2021-02-11T09:00:03Z

Can confirm in 21w06a

ampolive 2021-10-19T22:32:40Z

Can confirm in 21w41a.

ampolive 2022-01-19T17:19:57Z

Might be intended now as of 22w03a as per the changelogs:
— A seed of the number zero is no longer handled as a special case

user-f2760 2022-06-03T08:51:03Z

This reports still needs to get resolved as either WAI (no longer special) or fixed (no longer turns into 48).

dovisutu 2024-08-07T10:31:13Z

1.21 yields seed 0 for input 0, not 48. Might need to update the description (and perhaps status); didn't test when the change happened since the duration is long.