Error: Flow sequence contains an unexpected ,

[ikatyang]

version:
1.0.0-beta.6

input:

[ , ]
---
[ 123,, ]

output:

YAMLSyntaxError: Flow sequence contains an unexpected ,
YAMLSyntaxError: Flow sequence contains an unexpected ,

expected:

[ null ]
---
[ 123, null ]

P.S. There's no error for its flowMap version but its YAMLMap#items is also empty.

[eemeli]

These errors are in fact being reported correctly.

The sequence spec allows for a single trailing comma as long as it's followed by at least one sequence entry, but multiple commas are not allowed at any point since a flow sequence entry can't be an empty string.

The error here is that the map equivalents don't report these errors like they should.