Abstract `Equals` on record causes "BadImageFormatException"

Description

Record allows a abstract bool Equals(BaseType) method, but does not give a compiler error if it is not implemented on derived types.

Reproduction Steps

On a net8.0 or net9rc2 console project:

_ = new DerivedRecord() == new DerivedRecord();

abstract record BaseRecord()
{
    public abstract bool Equals(BaseRecord? other);
    public override int GetHashCode() => 0;
}

record DerivedRecord() : BaseRecord
{
}

Expected behavior

Compiler error requiring implementation of an Equals method on the derived type
Or generation of a default equals.
Or compiler error prohibiting abstract equals.

Actual behavior

Unhandled exception. System.BadImageFormatException: Bad IL format.
   at DerivedRecord.Equals(DerivedRecord other)
   at DerivedRecord.op_Equality(DerivedRecord left, DerivedRecord right)
   at Program.<Main>$(String[] args)

Regression?

I don't think so.

❌ net6.0-windows
❌ net7.0-windows
❌ net8.0-windows
❌ net9rc2-linux

Known Workarounds

Remove the abstract equals, or implement equals on all derived types:

record DerivedRecord() : BaseRecord
{
    public virtual bool Equals(DerivedRecord? other) => false;
}

Configuration

.Net 8.0.403 on W11 23H2 (22631) on x64
AnyCPU, x86, and x64 all produce same results

Other information

No response