Repository: dotnet/efcore
File: src/EFCore/Infrastructure/Uniquifier.cs (C#)

Code before:
        if (maxNameLength <= 0)
        {
            throw new ArgumentException(nameof(maxLength));
        }
    }

    private static ReadOnlySpan<char> TruncateImpl(ReadOnlySpan<char> identifier, Span<char> buffer, int maxNameLength, string? suffix, int? uniquifier)
    {
        int position;

        if (identifier.Length <= maxNameLength)
        {
            identifier.CopyTo(buffer);
            position = identifier.Length;
        }
        else
        {
            identifier[..(maxNameLength - 1)].CopyTo(buffer);
            buffer[maxNameLength - 1] = '~';
            position = maxNameLength;
        }

        if (uniquifier is not null)
        {
            uniquifier.Value.TryFormat(buffer[position..], out var written);
            position += written;
        }

        if (suffix is not null)
        {
            suffix.CopyTo(buffer[position..]);
            position += suffix.Length;
        }

        return buffer[..position];
    }

    private static int GetLength(int? number)
    {
        if (number == null)
        {
            return 0;
        }

        var length = 0;
        do
        {
            number /= 10;
            length++;
        }
        while (number.Value >= 1);

Review comment (bug):
The TryFormat method call doesn't check the return value to ensure formatting succeeded. If the buffer is too small for the formatted integer, TryFormat returns false and 'written' will be 0, potentially leading to incorrect results. While this shouldn't happen due to the buffer size calculation using MaxIntLength, it would be safer to either assert the return value is true or handle the failure case explicitly.
```suggestion
            if (uniquifier.Value.TryFormat(buffer[position..], out var written))
            {
                position += written;
            }
```

Code after:
        if (maxNameLength <= 0)
        {
            throw new ArgumentException("Invalid maximum length for truncation.", nameof(maxLength));
        }
    }

    private static ReadOnlySpan<char> TruncateImpl(ReadOnlySpan<char> identifier, Span<char> buffer, int maxNameLength, string? suffix, int? uniquifier)
    {
        int position;

        if (identifier.Length <= maxNameLength)
        {
            identifier.CopyTo(buffer);
            position = identifier.Length;
        }
        else
        {
            identifier[..(maxNameLength - 1)].CopyTo(buffer);
            buffer[maxNameLength - 1] = '~';
            position = maxNameLength;
        }

        if (uniquifier is not null)
        {
            var result = uniquifier.Value.TryFormat(buffer[position..], out var written);
            Check.DebugAssert(result, "Formatting uniquifier failed.");
            position += written;
        }

        if (suffix is not null)
        {
            suffix.CopyTo(buffer[position..]);
            position += suffix.Length;
        }

        return buffer[..position];
    }

    private static int GetLength(int? number)
    {
        if (number == null)
        {
            return 0;
        }

        var length = 0;
        do
        {
            number /= 10;
            length++;
        }