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Guard against ts_utils.listSeries nil return value

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Fixes #1891
This commit is contained in:
emanuele-f 2018-07-30 09:16:40 +02:00
parent 8c5b4e4ae7
commit 78d349c79a
1 changed files with 1 additions and 1 deletions
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2
scripts/lua/modules/graph_utils.lua
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@ -82,7 +82,7 @@ function getProtoVolume(ifName, start_time, end_time)
local series = ts_utils.listSeries("iface:ndpi", {ifid=ifId}, start_time)
ret = { }
for _, tags in ipairs(series) do
for _, tags in ipairs(series or {}) do
-- NOTE: this could be optimized via a dedicated driver call
local data = ts_utils.query("iface:ndpi", tags, start_time, end_time)