Large Lua files have "Not showing N further errors and warnings"

[Zamiell]

How are you using the lua-language-server?

Visual Studio Code Extension (sumneko.lua)

Which OS are you using?

Windows

What is the issue affecting?

Diagnostics/Syntax Checking

Problem

Related to: #1522

In large files, you can get into a situation where there are 0 errors reported in the errors pane except for "Not showing N further errors and warnings". Obviously, this makes it impossible to actually fix the errors, since you don't know what they are.

Thus, the bug seems to be that the Lua language server is incorrectly ignoring errors suppressed by the end-user, since they are still counting towards the 250 hardcoded (?) VSCode limit

Reproduction steps

Use the following Lua file:

https://gist.github.com/Zamiell/d0ab9f0b9d0d48efe9a14c293e44f8f0/raw/272057baf5028400e2aefed958b8d31defb01f02/main.lua

With the following .luarc.json file:

{
  "$schema": "https://raw.githubusercontent.com/sumneko/vscode-lua/master/setting/schema.json",
  "diagnostics.globals": [
    "ActionTriggers",
    "ActiveSlot",
    "BabySubType",
    "BackdropType",
    "BatterySubType",
    "BedSubType",
    "BitSet128",
    "BombSubType",
    "BombVariant",
    "ButtonAction",
    "CacheFlag",
    "Card",
    "Challenge",
    "ChampionColor",
    "ChestSubType",
    "CoinSubType",
    "CollectibleType",
    "Color",
    "CppContainer",
    "DamageFlag",
    "Difficulty",
    "Direction",
    "DoorSlot",
    "DoorState",
    "DoorVariant",
    "EffectVariant",
    "Entity",
    "EntityBomb",
    "EntityCollisionClass",
    "EntityEffect",
    "EntityFamiliar",
    "EntityFlag",
    "EntityGridCollisionClass",
    "EntityKnife",
    "EntityLaser",
    "EntityNPC",
    "EntityPartition",
    "EntityPickup",
    "EntityPlayer",
    "EntityProjectile",
    "EntityPtr",
    "EntityRef",
    "EntityTear",
    "EntityType",
    "FamiliarVariant",
    "Font",
    "Game",
    "GameStateFlag",
    "GetPtrHash",
    "GridCollisionClass",
    "GridEntity",
    "GridEntityDesc",
    "GridEntityDoor",
    "GridEntityPit",
    "GridEntityPoop",
    "GridEntityPressurePlate",
    "GridEntityRock",
    "GridEntitySpikes",
    "GridEntityTNT",
    "GridEntityType",
    "GridRooms",
    "HUD",
    "HeartSubType",
    "Input",
    "InputHook",
    "Isaac",
    "ItemConfig",
    "ItemPool",
    "ItemPoolType",
    "ItemType",
    "KColor",
    "KeySubType",
    "Keyboard",
    "LaserOffset",
    "LaserSubType",
    "Level",
    "LevelCurse",
    "LevelStage",
    "LevelStateFlag",
    "LocustSubtypes",
    "ModCallbacks",
    "Mouse",
    "Music",
    "MusicManager",
    "NpcState",
    "NullItemID",
    "Options",
    "PathFinder",
    "PickupPrice",
    "PickupVariant",
    "PillColor",
    "PillEffect",
    "PlayerForm",
    "PlayerSpriteLayer",
    "PlayerType",
    "PlayerTypes",
    "PoopPickupSubType",
    "PoopSpellType",
    "ProjectileFlags",
    "ProjectileParams",
    "ProjectileVariant",
    "QueueItemData",
    "REPENTANCE",
    "RNG",
    "Random",
    "RandomVector",
    "RegisterMod",
    "RenderMode",
    "Room",
    "RoomConfig",
    "RoomDescriptor",
    "RoomShape",
    "RoomTransitionAnim",
    "RoomType",
    "SFXManager",
    "SackSubType",
    "SeedEffect",
    "Seeds",
    "ShockwaveParams",
    "SkinColor",
    "SortingLayer",
    "SoundEffect",
    "Sprite",
    "StageType",
    "StartDebug",
    "TearFlags",
    "TearParams",
    "TearVariant",
    "TemporaryEffect",
    "TemporaryEffects",
    "TrinketType",
    "UseFlag",
    "Vector",
    "WeaponType",
    "AwaitingTextInput",
    "EID",
    "Encyclopedia",
    "ModConfigMenu",
    "MinimapAPI",
    "StageAPI",
    "g",
    "gd",
    "getParentFunctionDescription",
    "sandboxGetTraceback",
    "sandboxTraceback"
  ],
  "preloadFileSize": 5000,
  "runtime.version": "Lua 5.3"
}

Then, you will see that there are Not showing 2551 further errors and warnings. in the "Problems" pane of VSCode.

[carsakiller]

Do you have any other extensions on that may be contributing other warnings/errors? I am unable to replicate. I am given many warnings and errors before receiving the “Not showing…” message.

[Zamiell]

As per your suggestion, I tried disabling all extensions except for the Sumneko one. But something weird seems to be happening.

Open opening the "main.lua" file included in my OP, I get these errors:

They seem to be relating to files inside of the sumneko extension itself.
Do you know why this is happening?

[Zamiell]

Never-mind my previous comment; I had a problem relating to using a temp extensions subdirectory of the CWD.

Anyways, I am still not able to reproduce your results even with the sumneko extension being on the only extension installed.

Specifically, I am using the following command to launch VSCode:

code . --extensions-dir ../temp/vscode/ --user-data-dir ../temp/vscode/

Then, I install the Sumneko extension (because it starts with everything vanilla with no extensions installed).

Then, I open up main.lua, and I get this:

[Zamiell]

If it matters, I am on Windows 10:

[4grabs]

I also downloaded the main.lua file that is provided in the OP and I get the same problem as Zamiel

I am also on Windows 10.

[sumneko]

This is because some low-level diagnostics are not displayed in the window, such as unused-local, tail-space

[Zamiell]

Why are they not being displayed? Is the language server bugged?

[sumneko]

There are 4 levels of diagnostics: error, warning, information, hint.
The diagnostics of hint level are not displayed in the problems window.

[Zamiell]

I see. Why is the Lua language server outputting hints? Can we change it so that it doesn't use any hints at all?

[sumneko]

I see. Why is the Lua language server outputting hints? Can we change it so that it doesn't use any hints at all?

Use diagnostics.groupSeverity or diagnostics.severity