Error while complete file path

[yqrashawn]

Debugger entered--Lisp error: (json-string-format "?\\C-@")
  signal(json-string-format ("?\\C-@"))
  json-read-string()
  json-read()
  json-read-object()
  json-read()
  json-read-array()
  json-read()
  json-read-object()
  json-read()
  json-read-from-string("{\"suffix_to_substitute\":\"B\",\"results\":[{\"result\":\"Bee.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"BitBar.app\",\"prefix_to_substitute\":\"\"},
{\"result\":\"Boom 3D.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Blender.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"BearyChat.app\",\"prefix_to_substitute\":\"\"},
{\"result\":\"Basecamp 3.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Blenderplayer.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Backup and Sync.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"iBooks.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"qBittorrent.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"AnyBar.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"KextBeast.pkg\",\"prefix_to_substitute\":\"\"},
{\"result\":\"Font Book.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"MultiBeast.app\",\"prefix_to_substitute\":\"\"},
{\"result\":\"Photo Booth.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Kitematic (Beta).app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Robo 3T.app\",\"prefix_to_substitute\":\"\"},
{\"result\":\"Sublime Text.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Tongbu.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Numbers.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Keybase.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Dropbox.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Tweetbot.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Cakebrew.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Enjoyable.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Dashboard.app\",\"prefix_to_substitute\":\"\"},
{\"result\":\"Geekbench 4.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Keyboard Maestro.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Karabiner-Elements.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Karabiner-EventViewer.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Sketch Toolbox.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"NativeDisplayBrightness.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"YY.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Sketch.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Setapp.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Safari.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Remacs.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Reeder.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Photos.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"IDLE 3.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Flinto.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Dota 2.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Docker.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Deluge.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"ClashX.app\",\"prefix_to_substitute\":\"\"},{\"result\":\".localized\",\"prefix_to_substitute\":\"\"},{\"result\":\"Thunder.app\",\"prefix_to_substitute\":\"\"},
{\"result\":\"Textua")
  company-tabnine--decode("{\"suffix_to_substitute\":\"B\",\"results\":[{\"result\":\"Bee.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"BitBar.app\",\"prefix_to_substitute\":\"\"},
{\"result\":\"Boom 3D.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Blender.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"BearyChat.app\",\"prefix_to_substitute\":\"\"},
{\"result\":\"Basecamp 3.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Blenderplayer.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Backup and Sync.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"iBooks.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"qBittorrent.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"AnyBar.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"KextBeast.pkg\",\"prefix_to_substitute\":\"\"},
{\"result\":\"Font Book.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"MultiBeast.app\",\"prefix_to_substitute\":\"\"},
{\"result\":\"Photo Booth.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Kitematic (Beta).app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Robo 3T.app\",\"prefix_to_substitute\":\"\"},
{\"result\":\"Sublime Text.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Tongbu.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Numbers.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Keybase.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Dropbox.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Tweetbot.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Cakebrew.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Enjoyable.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Dashboard.app\",\"prefix_to_substitute\":\"\"},
{\"result\":\"Geekbench 4.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Keyboard Maestro.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Karabiner-Elements.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Karabiner-EventViewer.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Sketch Toolbox.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"NativeDisplayBrightness.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"YY.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Setapp\",\"prefix_to_substitute\":\"\"},{\"result\":\"mpv.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Paw.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Siri.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Maps.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Mail.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Logitech\",\"prefix_to_substitute\":\"\"},{\"result\":\"IINA.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"IDLE.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Folx.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Flux.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Dash.app\",\"prefix_to_substitute\":\"\"},{\"result\":\".gitkeep\",\"prefix_to_substitute\":\"\"},{\"result\":\"iTerm.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Xcode.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Utilities\",\"prefix_to_substitute\":\"\"},{\"result\":\"Surge.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Steam.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Spark.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Slack.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Pages.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Notes.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Marta.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Lumen.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Ivacy.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Eudic.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Emacs.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Chess.app\",\"prefix_to_substitute\":\"\"},{\"result\":\".DS_Store\",\"prefix_to_substitute\":\"\"},{\"result\":\"iTunes.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"WeChat.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"V2RayX.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Sketch.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Setapp.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Safari.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Remacs.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Reeder.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Photos.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"IDLE 3.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Flinto.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Dota 2.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Docker.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Deluge.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"ClashX.app\",\"prefix_to_substitute\":\"\"},{\"result\":\".localized\",\"prefix_to_substitute\":\"\"},{\"result\":\"Thunder.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Textua")
  company-tabnine--process-filter(#<process company-tabnine--process> "{\"suffix_to_substitute\":\"B\",\"results\":[{\"result\":\"Bee.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"BitBar.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Boom 3D.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Blender.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"BearyChat.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Basecamp 3.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Blenderplayer.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Backup and Sync.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"iBooks.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"qBittorrent.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"AnyBar.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"KextBeast.pkg\",\"prefix_to_substitute\":\"\"},{\"result\":\"Font Book.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"MultiBeast.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Photo Booth.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Kitematic (Beta).app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Robo 3T.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Sublime Text.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Tongbu.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Numbers.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Keybase.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Dropbox.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Tweetbot.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Cakebrew.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Enjoyable.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Dashboard.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Geekbench 4.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Keyboard Maestro.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Karabiner-Elements.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Karabiner-EventViewer.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Sketch Toolbox.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"NativeDisplayBrightness.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"YY.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Setapp\",\"prefix_to_substitute\":\"\"},{\"result\":\"mpv.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Paw.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Siri.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Maps.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Mail.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Logitech\",\"prefix_to_substitute\":\"\"},{\"result\":\"IINA.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"IDLE.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Folx.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Flux.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Dash.app\",\"prefix_to_substitute\":\"\"},{\"result\":\".gitkeep\",\"prefix_to_substitute\":\"\"},{\"result\":\"iTerm.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Xcode.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Utilities\",\"prefix_to_substitute\":\"\"},{\"result\":\"Surge.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Steam.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Spark.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Slack.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Pages.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Notes.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Marta.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Lumen.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Ivacy.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Eudic.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Emacs.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Chess.app\",\"prefix_to_substitute\":\"\"},{\"result\":\".DS_Store\",\"prefix_to_substitute\":\"\"},{\"result\":\"iTunes.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"WeChat.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"V2RayX.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Sketch.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Setapp.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Safari.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Remacs.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Reeder.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Photos.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"IDLE 3.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Flinto.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Dota 2.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Docker.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Deluge.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"ClashX.app\",\"prefix_to_substitute\":\"\"},{\"result\":\".localized\",\"prefix_to_substitute\":\"\"},{\"result\":\"Thunder.app\",\"prefix_to_substitute\":\"\"},{\"result\":\"Textua")
  accept-process-output(#<process company-tabnine--process> 0.25)
  company-tabnine-send-request((:version "0.11.1" :request (:Autocomplete (:before "                [:open_bracket [:!Tx :!T9 :open_bracket]]\n                 [:close_bracket [:!Tx :!T9 :close_bracket]]]}\n        {:des \"Vi Mode [D as Trigger Key]\"\n         :rules [:vi-mode\n                 [:##j :down_arrow]\n                 [:##k :up_arrow]\n                 [:##h :left_arrow]\n                 [:##l :right_arrow]\n                 [:##b :!Oleft_arrow]\n                 [:##w :!Oright_arrow]\n                 [:##0 :!Ta]\n                 [:##4 :!Te]]}\n        {:des \"Vi Visual Mode\"\n         :rules [:vi-visual-mode\n                 [:##j :!Sdown_arrow]\n                 [:##k :!Sup_arrow]\n                 [:##h :!Sleft_arrow]\n                 [:##l :!Sright_arrow]\n                 [:##b :!SOleft_arrow]\n                 [:##w :!SOright_arrow]\n                 [:##0 :!SCleft_arrow]\n                 [:##4 :!SCright_arrow]\n                 [:##open_bracket :!SOup_arrow]\n                 [:##close_bracket :!SOdown_arrow]]}\n        {:des \"Emacs switch buffer\"\n         :rules [:Emacs\n                 [:tab :!Ttab :period-mode]\n                 [:tab :!TStab :comma-mode]]}\n        {:des \"launcher mode\"\n         :rules [:launch-mode\n                 [:j [:open \"/Applications/Alacritty.app\"]]\n                 [:k [:open \"/Applications/Emacs.app\"]]\n                 [:l [:open \"/Applications/Google Chrome Canary.app/\"]]\n                 [:m [:open \"/Applications/Mail.app\"]]\n                 [:v [:open \"/Applications/WeChat.app\"]]\n                 [:q [:open \"/Applications/Karabiner-Elements.app\"]]\n                 [:f [:open \"/Applications/Finder.app\"]]\n                 [:9 [:open \"/Applications/PDF Expert.app\"]]\n                 [:comma [:open \"/Applications/Safari.app\"]]\n                 [:h [:open \"/Applications/Bee.app\"]]\n                 [:period [:open \"/Applications/Paw.app\"]]\n                 [:equal_sign [:open \"/Applications/Textual.app\"]]\n                 [:8 [:open \"/Applications/Karabiner-EventViewer.app\"]]\n                 [:b [:launch \"/Applications/B" :after "\"]]\n                 [:c [:launch \"VSCode\"]]\n                 [:t [:launch \"2do\"]]\n                 [:r [:launch \"Timing\"]]\n                 ;; [:t [:launch \"Pagico\"]]\n                 #_[:l [:!Cgrave_accent_and_tilde] :Chromes]\n                 [:d [{:key :n :modi [:right_option]} {:key :d :modi [:right_option]} {:key :b :modi [:right_option]} :return_or_enter]]]}\n        {:des \"caps_lock\"\n         :rules [[:##caps_lock :left_control nil {:alone :escape}]]}\n        {:des \"HHKB, FILCO MINILA Change left control to esc if alone\"\n         :rules [[:##left_control :left_control [:hhkb-bt :hhkb :hhkb-tmk :filco-minila] {:alone :escape}]]}\n        {:des \"Change right_command to command-tab when used alone\"\n         :rules [[:right_command :right_command nil {:alone [:!Ctab]}]\n                 [:application :right_command nil {:alone [:!Ctab]}]]}\n        {:des \"Change left_option to f18 when used alone\"\n         :rules [[:left_option :left_option nil {:alone [:f18]}]]}\n        {:des \"Quit application by pressing command-q twice\"\n         :rules [[:!C#Pq [:!Cq [\"command-q\" 0]] [\"command-q\" 1]]\n                 [:!C#Pq [\"command-q\" 1] nil {:delayed {:invoked [\"command-q\" 0] :canceled [\"commandq\" 0]}}]]}\n        {:des \"Change right_option to switch to second recent application when used alone\"\n         :rules [[:right_option :right_option nil {:alone [\"osascript ~/Dropbox/sync/Automator/switch-to-second-previous-app.scpt\"]}]]}\n        {:des \"some simultaneous keys\"\n         :rules [[[:h :l] [:alf \"helpSearch\" \"com.tedwise.menubarsearch\"]]\n                 [[:j :l] [:f19 [\"in-alfred\" 1]]]]}\n        {:des \"alfred mode\"\n         :rules [[:l :!COi :browsers-alfred-mode]\n                 [:l :!CTslash [:finder-alfred-mode [\"in-alfred\" 1]]]\n                 :alfred-mode\n                 [:h [[:alf \"search repos\" \"me.lachlan.githubjump\"] [\"in-alfred\" 1]]]\n                 [:j [:alf \"searchGithub\" \"nikivi.search-the-web\"]]\n                 [:return_or_enter [:alf \"web searches\" \"nik" :filename "/Users/yqrashawn/.config/karabiner.edn" :region_includes_beginning :json-false :region_includes_end :json-false :max_num_results 10))))
  company-tabnine-query()
  company-tabnine(prefix)
  apply(company-tabnine prefix)
  company-call-backend-raw(prefix)
  apply(company-call-backend-raw prefix)
  company--force-sync(company-call-backend-raw (prefix) company-tabnine)
  company-call-backend(prefix)
  company--begin-new()
  company--perform()
  company-auto-begin()
  company-idle-begin(#<buffer karabiner.edn> #<window 24 on *scratch*> 82662 7583)
  apply(company-idle-begin (#<buffer karabiner.edn> #<window 24 on *scratch*> 82662 7583))
  timer-event-handler([t 23592 9312 622957 nil company-idle-begin (#<buffer karabiner.edn> #<window 24 on *scratch*> 82662 7583) nil 0])

message buffer

error in process filter: json-read-string: Bad string format: "?\\C-@"
error in process filter: Bad string format: "?\\C-@"
error in process filter: Unrecognized keyword: "te" [2 times]
error in process filter: json-read: JSON readtable error: 115
error in process filter: JSON readtable error: 115
error in process filter: json-read-string: Bad string format: "?\\C-@"
error in process filter: Bad string format: "?\\C-@"
error in process filter: json-read: JSON readtable error: 95
error in process filter: JSON readtable error: 95
Company: An error occurred in auto-begin
Company: backend company-tabnine error "Wrong type argument: listp, "},{"" with args (prefix)

[Deewiant]

I can confirm this as well. It's easy to trigger with a directory with lots of files in it: typing /lib/ or /usr/lib/ works for me, for example.

It seems that the issue is that make-process uses a 4096-byte buffer internally, so company-tabnine--process-filter isn't necessarily called with the full JSON response from TabNine, which can be much longer than that. This is especially annoying because there are actually multiple errors, one for each 4096-byte chunk of the response, since of course each chunk fails to decode. There's some quite noticeable freezing in the UI when this happens, which I hope is due to the errors and not because emacs can't read and decode the response quickly enough...

I presume this could be fixed by something along the lines of having a (buffer-local?) variable into which company-tabnine--process-filter accumulates what it sees, only calling company-tabnine--decode once the terminating \n character is encountered.

[bkudria]

Is this an instance of https://nullprogram.com/blog/2018/01/17/ ?

[TommyX12]

Should be fixed in the latest commit.