Error for "missing argument in class setters" fails to format

[Marsup]

Using espree master, this code :

espree.parse('class A { set foo(){} }', { ecmaFeatures: { classes: true }});

Throws :

Error: ASSERT: Message reference must be in range
    at assert (/home/ubuntu/workspace/espree.js:78:15)
    at /home/ubuntu/workspace/espree.js:2083:17
    at String.replace (native)
    at throwError (/home/ubuntu/workspace/espree.js:2080:29)
    at throwErrorTolerant (/home/ubuntu/workspace/espree.js:2106:20)
    at tryParseMethodDefinition (/home/ubuntu/workspace/espree.js:2438:17)
    at parseClassBody (/home/ubuntu/workspace/espree.js:4984:22)
    at parseClassDeclaration (/home/ubuntu/workspace/espree.js:5065:17)
    at parseSourceElement (/home/ubuntu/workspace/espree.js:5095:28)
    at parseSourceElements (/home/ubuntu/workspace/espree.js:5143:25)

I think tryParseMethodDefinition L2438 should be throwErrorTolerant(lookahead, Messages.UnexpectedToken, lookahead.value);