Built in reduces fail for Development Time Subset

Start couchbase with 64 buckets (either an OSX build or set the env. variable COUCHBASE_NUM_VBUCKETS=64)

Load the beer-sample data set, create a view:

map: function (doc, meta) {
if (doc.type == "beer" && doc.brewery_id && typeof doc.abv == "number")

{ emit(doc.brewery_id, doc.abv); }

}

reduce: _stats

With "Development Time Subset" selected, click "Show results".

Returns the error:

{error,<<"Builtin _stats function requires map values to be numbers">>}

Thrown from: https://github.com/couchbase/couchdb/blob/4629c5167a877c7110dd55c27a7e1028558e5da4/src/couchdb/couch_view_mapreduce.erl#L267

if I log the input to builtin_stats from there i see:

[

{<<"[\"alaskan_brewing\",\"alaskan_brewing-alaskan_summer_ale\"]">>, <<"5.3">>}

,

{<<"[\"allentown_brew_works\",\"allentown_brew_works-pumpkin_ale\"]">>, <<"5.2">>}

,

{<<"[\"anheuser_busch\",\"anheuser_busch-bare_knuckle_stout\"]">>, <<"0">>}

,

{<<"[\"appalachian_brewing_company\",\"appalachian_brewing_company-pennypacker_porter\"]">>, <<"5.4">>}

,

{<<"[\"appalachian_brewing_company\",\"appalachian_brewing_company-zoigl_star_lager\"]">>, <<"5.9">>}

,

{<<"[\"avery_brewing_company\",\"avery_brewing_company-old_jubilation_ale\"]">>, <<"8">>}

]

When the KV list is being passed to the builtin_stats function in this case, these numbers are still strings (but they were definitely emitted as numbers), causing the when(is_number, First) guard in the second clause to fail.