See log: https://luci-logdog.appspot.com/v/?s=chromium%2Fbb%2Fchromium.linux%2FLinux_Tests%2F49891%2F%2B%2Frecipes%2Fsteps%2FUpload_to_test-results__telemetry_perf_unittests_%2F0%2Fstdout

Server log, which is probably relevant:

06:05:34.426
Added data entry. :: {"id":5584997733105664, "index":0, "size":86743}
06:05:34.493
Read loading DataEntry ID: 6734717755850752
06:05:34.493
Read loading DataEntry ID: 5588538556940288
06:05:34.512
updateIncremental: unmarshal TestFile data :: {"error":"json: cannot unmarshal number 1415119812.6955171 into Go value of type int64"}
06:05:34.514
updateIncremental: unmarshal TestFile data :: {"error":"json: cannot unmarshal number 1415119812.6955171 into Go value of type int64"}
06:05:34.514
File encountered error. :: {"error":"json: cannot unmarshal number 1415119812.6955171 into Go value of type int64", "index":0}
06:05:34.514
updateFullResults: updateIncremental :: {"error":"json: cannot unmarshal number 1415119812.6955171 into Go value of type int64"}
06:05:34.514
uploadHandler :: {"error":"json: cannot unmarshal number 1415119812.6955171 into Go value of type int64"}


Not sure what the correct component here is... :/