dictionary - Why does this code crash the second time it is executed in FSI? -


i have code generates exception second time executed in fsi. sequence following:

1) select lines above it, run on fsi using alt+enter.

2) select code, run on fsi using alt+enter. far no errors.

3) run selected code again hitting alt+enter. error (see below).

here lines of code generating behavior:

let assetsmap =     assetinfo.rows     |> seq.filter (fun (rw: assetsinfo.row) -> set.contains rw.ticker assetstickerset)     |> list.ofseq     |> list.map (fun rw -> rw.ticker, asset.constructor rw) // frame.readcsv called here     |> map.ofseq

relevant info:

type assetsinfo = fsharp.data.csvprovider<...>

error message:

system.invalidoperationexception: tried skip input sequence has insufficient number of elements. 1 past end of seq    @ microsoft.fsharp.collections.seqmodule.skip@1316.generatenext(ienumerable`1& next)    @ microsoft.fsharp.core.compilerservices.generatedsequencebase`1.movenextimpl()    @ microsoft.fsharp.core.compilerservices.generatedsequencebase`1.system-collections-ienumerator-movenext()    @ fsharp.data.runtime.csvhelpers.parseintotypedrows@176.generatenext(ienumerable`1& next) in c:\git\fsharp.data\src\csv\csvruntime.fs:line 176    @ microsoft.fsharp.core.compilerservices.generatedsequencebase`1.movenextimpl()    @ microsoft.fsharp.core.compilerservices.generatedsequencebase`1.system-collections-ienumerator-movenext()    @ microsoft.fsharp.collections.internal.ienumerator.next@187[t](fsharpfunc`2 f, ienumerator`1 e, fsharpref`1 started, unit unitvar0)    @ microsoft.fsharp.collections.internal.ienumerator.filter@182.system-collections-ienumerator-movenext()    @ microsoft.fsharp.collections.seqmodule.tolist[t](ienumerable`1 source)    @ <startupcode$fsi_0035>.$fsi_0035.main@() in h:\dropbox\bitbucket\vsprojects\fractal10\fractal10\program.fs:line 139 stopped due error

any ideas on reason odd behavior?


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