masking of objects between mtrace() and getYahooData()

I am using getYahooData from TTR to get daily data. When i do it standalone,
it is fine. It also works fine inside my code. However, when i run code
inside mtrace(), i always get the following  error:

 Error in xts(cbind(adj[[1]], adj[[2]]), index(obj)):
order.by requires an appropriate time-based object

After a lot of hand wringing, it looks to me that it happens because index
in xts masks index in package mvbutils. Is there any way to avoid this type
of masking of objects?

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