In 13.2 "Arrow Function Definitions",
under "Supplemental Syntax",
"When processing the production /CoverFormalsList : Expression/
the /FormalsList/ production is used to further restrict the
source code that matches /Expression/."
but then gives a production for /ArrowFormalParameterList/, not /FormalsList/.
Similarly, under "Static Semantics: Early Errors",
under "CoverFormalsList : Expression",
there are references to "FormalsList".
In each case, change "FormalsList" to "ArrowFormalParameterList", I think.
On second thought, I think the uses of "FormalsList" are correct, and it's the production
ArrowFormalParameterList : FormalParameterList
that shouldn't be there.
ArrowFormalParameterList : FormmalParameterList
removed in editor's draft.
fixed in rev10, Sept. 27 2012 draft