P1 of mid: {"type":"ExpressionStatement","expression":{"type":"AssignmentExpression","left":{"type":"Identifier","name":"of"},"operator":"=",
P2 of start: ERROR: [1:0-1:7]: Unexpected token: 'escaped keyword'
P3 as mid: ERROR: [1:0-1:7]: Unexpected token: 'escaped keyword'
P4 async esc: {"type":"ExpressionStatement","expression":{"type":"AssignmentExpression","left":{"type":"Identifier","name":"async"},"operator":"
P5 using mid: {"type":"ExpressionStatement","expression":{"type":"AssignmentExpression","left":{"type":"Identifier","name":"using"},"operator":"
P6 using start: ERROR: [1:0-1:10]: Unexpected token: 'escaped keyword'
P7 using start strict: {"type":"ExpressionStatement","expression":{"type":"AssignmentExpression","left":{"type":"Identifier","name":"using"},"operator":"
P8 of mid strict: {"type":"ExpressionStatement","expression":{"type":"AssignmentExpression","left":{"type":"Identifier","name":"of"},"operator":"=",
P9 var using esc: {"type":"VariableDeclaration","kind":"var","declarations":[{"type":"VariableDeclarator","id":{"type":"Identifier","name":"using"},
P10 using decl esc: ERROR: [1:11-1:12]: Unexpected token: 'identifier'
P11 accessor esc: ERROR: [1:24-1:25]: Unexpected token: 'identifier'
P12 let esc: {"type":"ExpressionStatement","expression":{"type":"AssignmentExpression","left":{"type":"Identifier","name":"let"},"operator":"="
