8024255: When a keyword is used as object property name, the property can not be deleted
Reviewed-by: jlaskey, lagergren
ReferenceError: <function>:1:50 Invalid left hand side for assignment
/*infloop*/while(((function ()4.)([z1,,], [,,]) - true++))switch(1e+81.x) { default: break; }
^
SyntaxError: <function>:1:5 Expected l-value but found )
if(--) y;
^