3 files changed, 10 insertions, 11 deletions
diff --git a/scripts/check-queries.lua b/scripts/check-queries.lua
index d951cf2d6..94d8951cb 100755
--- a/scripts/check-queries.lua
+++ b/scripts/check-queries.lua
@@ -14,7 +14,6 @@ do
 
   for _, lang in pairs(parsers) do
     if configs[lang] and configs[lang].install_info then
-      timings[lang] = {}
       for _, query_type in pairs(query_types) do
         local before = vim.uv.hrtime()
         local ok, query = pcall(vim.treesitter.query.get, lang, query_type)
diff --git a/scripts/install-parsers.lua b/scripts/install-parsers.lua
index 2d083f3c3..c97c6eecc 100755
--- a/scripts/install-parsers.lua
+++ b/scripts/install-parsers.lua
@@ -2,7 +2,7 @@
 
 local generate = false
 local update = false
-local max_jobs = nil ---@type integer?
+local max_jobs = nil ---@type number?
 local parsers = {}
 for i = 1, #_G.arg do
   if _G.arg[i] == '--generate' then
@@ -10,7 +10,7 @@ for i = 1, #_G.arg do
   elseif _G.arg[i] == '--update' then
     update = true
   elseif _G.arg[i]:find('^%-%-max%-jobs') then
-    max_jobs = _G.arg[i]:match('=(%d+)')
+    max_jobs = tonumber(_G.arg[i]:match('=(%d+)'))
   else
     parsers[#parsers + 1] = _G.arg[i] ---@type string
   end
diff --git a/scripts/update-parsers.lua b/scripts/update-parsers.lua
index 83f724970..bab572c27 100755
--- a/scripts/update-parsers.lua
+++ b/scripts/update-parsers.lua
@@ -6,7 +6,7 @@
 -- nvim -l update-parsers.lua --tier=1   # update stable parsers to latest version
 -- nvim -l update-parsers.lua --tier=2   # update unstable parsers to latest commit
 
-local tier = nil ---@type integer?
+local tier = nil ---@type number?
 for i = 1, #_G.arg do
   if _G.arg[i]:find('^%-%-tier=') then
     tier = tonumber(_G.arg[i]:match('=(%d+)'))
@@ -41,15 +41,15 @@ for k, p in pairs(parsers) do
 
   if #vim.tbl_keys(jobs) % 100 == 0 or next(parsers, k) == nil then
     for name, job in pairs(jobs) do
-      local stdout = vim.split(job:wait().stdout, '\n')
+      local stdout = vim.split(job:wait().stdout or '', '\n')
       jobs[name] = nil
 
-      local info = parsers[name].install_info
-      assert(info)
+      assert(parsers[name])
+      local info = assert(parsers[name].install_info)
 
-      local sha ---@type string
+      local sha ---@type string?
       if parsers[name].tier == 1 then
-        sha = stdout[#stdout - 1]:match('v[%d%.]+$')
+        sha = stdout[#stdout - 1] and stdout[#stdout - 1]:match('v[%d%.]+$')
       else
         local branch = info.branch
         local line = 1
@@ -61,10 +61,10 @@ for k, p in pairs(parsers) do
             end
           end
         end
-        sha = vim.split(stdout[line], '\t')[1]
+        sha = stdout[line] and vim.split(stdout[line], '\t')[1]
       end
 
-      if info.revision ~= sha then
+      if sha and info.revision ~= sha then
         info.revision = sha
         updates[#updates + 1] = name
       end