Figure out how to make it through CMD CHECK

[mailund]

Functions that use pattern-matching via cases bind variables. This gives me warnings when running CMD CHECK, but I can get around those by defining dummy-variables, I guess. Much worse is that I get this error:

Error in attr(e, "srcref")[[i]] : subscript out of bounds
Calls: <Anonymous> ... <Anonymous> -> collectUsage -> collectUsageFun -> walkCode -> h

if I transform functions using tailr. I think this is because I do not set srcref in the transformation, but even when I do that, I get the error. I am not sure how to debug this.