Eska látor!

Repost from https://discourse.julialang.org/t/query-mutate-changes-other-column-type/39292 as it looks like a bug. This is my smallest code with repro: ```julia contents = """ "5674012","aa66aa66" "5674012","b036aa66,b036aa67,b036aa68" """; batches = CSV.File(IOBuffer(contents); header = ["X1", "Splits"],...

Unable to run !ClrStack -a because of duplicite stack frames

5

I'm running `!ClrStack -a` and I get this error message for some threads ``` Exception during command execution -- InvalidOperationException: 'Sequence contains more than one matching element' at System.Linq.Enumerable.SingleOrDefault[TSource](IEnumerable`1 source,...

I'm on master of zserge/lorca. Just upgraded do go 1.12 (windows), so might be related to this, but I doubt it. The problem: When running lorca app, it worked fine...