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Fixed in 2022.1.X

Fixed in 2021.2.X

Votes

1

Found in

2021.2.0b6

2022.1

Issue ID

1355846

Regression

No

System.Memory ReadOnlySpan() method is not supported and throws an error when used

Mono

-

Reproduction steps:
1. Open the user's attached project
2. Observer the Console

Expected result: The are no errors in the Console
Actual result: There is an error in the Console

Reproducible with: 2021.2.0b6, 2022.1.0a5
Not reproducible with: 2020.3.16f1, 2021.1.17f1, 2021.2.0b5
could not test with: 2019.4.29f1 (downgraded project throws error)

Note:
-The error is: Assets\SpanTest.cs(26,29): error CS0570: 'ReadOnlySpan<T>.this[int].get' is not supported by the language

  1. Resolution Note (fix version 2022.1):

    Fixed in 2022.1.0a7

  2. Resolution Note (fix version 2021.2):

    Fixed in 2021.2.0b11

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Comments (1)

  1. SugoiDev

    Aug 23, 2021 14:11

    Related forum thread: https://forum.unity.com/threads/2021-2-0b6-and-system-memory-readonlyspan-under-net-4-8.1152104/

    Also missing: pinning spans. So this also doesn't work

    private static unsafe void SpanInFixedContext(ReadOnlySpan<byte> s) {
    fixed (byte* dest = s) {
    //do something
    }
    }

    Previously, we would be able to add System.Memory.dll manually, but doing so now will cause conflicts since mscorlib already includes it (even if partially).

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