fix runtime errors

6 files changed, 43 insertions, 25 deletions

diff --git a/changelog.md b/changelog.md
index 00c2c275..92465e50 100644
--- a/changelog.md
+++ b/changelog.md
@@ -3,6 +3,7 @@
 ## 2.5.6
 * `CHG` diagnostic: now syntax errors in `LuaDoc` are shown as `Warning`
 * `FIX` return type of `math.floor`
+* `FIX` runtime errors
 
 ## 2.5.5
 `2021-12-16`
diff --git a/script/core/completion/completion.lua b/script/core/completion/completion.lua
index efd62fb6..472b1118 100644
--- a/script/core/completion/completion.lua
+++ b/script/core/completion/completion.lua
@@ -1064,14 +1064,14 @@ local function tryLabelInString(label, source)
     if not source or source.type ~= 'string' then
         return label
     end
-    local str = parser.grammar(label, 'String')
-    if not str then
+    local state = parser.parse(label, 'String')
+    if not state or not state.ast then
         return label
     end
-    if not matchKey(source[1], str[1]) then
+    if not matchKey(source[1], state.ast[1]) then
         return nil
     end
-    return util.viewString(str[1], source[2])
+    return util.viewString(state.ast[1], source[2])
 end
 
 local function mergeEnums(a, b, source)
@@ -2048,6 +2048,9 @@ local function completion(uri, position, triggerCharacter)
     await.delay()
     tracy.ZoneBeginN 'completion #1'
     local state = files.getState(uri)
+    if not state then
+        return nil
+    end
     results = {}
     clearStack()
     tracy.ZoneEnd()
diff --git a/script/core/infer.lua b/script/core/infer.lua
index 92aa65d5..d204fff1 100644
--- a/script/core/infer.lua
+++ b/script/core/infer.lua
@@ -520,6 +520,9 @@ end
 ---@param mark? table
 ---@return table
 function m.searchLiterals(source, field, mark)
+    if not source then
+        return nil
+    end
     local defs = vm.getDefs(source, field)
     local literals = {}
     mark = mark or {}
@@ -541,6 +544,9 @@ function m.searchAndViewLiterals(source, field, mark)
         return nil
     end
     local literals = m.searchLiterals(source, field, mark)
+    if not literals then
+        return nil
+    end
     local view = m.viewLiterals(literals)
     return view
 end
@@ -559,10 +565,12 @@ function m.isTrue(source, mark)
     if mark.isTrue[source] == nil then
         mark.isTrue[source] = false
         local literals = m.searchLiterals(source, nil, mark)
-        for literal in pairs(literals) do
-            if literal ~= false then
-                mark.isTrue[source] = true
-                break
+        if literals then
+            for literal in pairs(literals) do
+                if literal ~= false then
+                    mark.isTrue[source] = true
+                    break
+                end
             end
         end
     end
diff --git a/script/library.lua b/script/library.lua
index 81242a91..daf91a38 100644
--- a/script/library.lua
+++ b/script/library.lua
@@ -221,8 +221,13 @@ local function initBuiltIn()
     end
     m.metaPath = metaPath:string()
     m.metaPaths = {}
-    if not fs.exists(metaPath) then
-        fs.create_directories(metaPath)
+    local suc = xpcall(function ()
+        if not fs.exists(metaPath) then
+            fs.create_directories(metaPath)
+        end
+    end, log.error)
+    if not suc then
+        return
     end
     local out = fsu.dummyFS()
     local templateDir = ROOT / 'meta' / 'template'
@@ -462,7 +467,9 @@ local function check3rd(uri)
     if checkedUri(uri) then
         if files.isLua(uri) then
             local text = files.getText(uri)
-            check3rdByWords(text, thirdConfigs)
+            if text then
+                check3rdByWords(text, thirdConfigs)
+            end
         end
         check3rdByFileName(uri, thirdConfigs)
     end
diff --git a/script/log.lua b/script/log.lua
index c3bf02d4..90de895a 100644
--- a/script/log.lua
+++ b/script/log.lua
@@ -12,8 +12,6 @@ local mathModf       = math.modf
 local debugGetInfo   = debug.getinfo
 local ioStdErr       = io.stderr
 
-_ENV = nil
-
 local m = {}
 
 m.file = nil
@@ -91,9 +89,6 @@ function m.raw(thd, level, msg, source, currentline, clock)
         return
     end
     init_log_file()
-    if not m.file then
-        return ''
-    end
     local sec, ms = mathModf((m.startTime + clock) / 1000)
     local timestr = osDate('%H:%M:%S', sec)
     local agl = ''
@@ -107,11 +102,13 @@ function m.raw(thd, level, msg, source, currentline, clock)
         buf = ('[%s.%03.f][%s]%s[#%d:%s:%s]: %s\n'):format(timestr, ms * 1000, level, agl, thd, trimSrc(source), currentline, msg)
     end
     m.size = m.size + #buf
-    if m.size > m.maxSize then
-        m.file:write(buf:sub(1, m.size - m.maxSize))
-        m.file:write('[REACH MAX SIZE]')
-    else
-        m.file:write(buf)
+    if m.file then
+        if m.size > m.maxSize then
+            m.file:write(buf:sub(1, m.size - m.maxSize))
+            m.file:write('[REACH MAX SIZE]')
+        else
+            m.file:write(buf)
+        end
     end
     return buf
 end
@@ -130,9 +127,11 @@ function m.init(root, path)
     m.path = path:string()
     m.prefixLen = #root:string()
     m.size = 0
-    if not fs.exists(path:parent_path()) then
-        fs.create_directories(path:parent_path())
-    end
+    pcall(function ()
+        if not fs.exists(path:parent_path()) then
+            fs.create_directories(path:parent_path())
+        end
+    end)
     if lastBuf then
         init_log_file()
         if m.file then
diff --git a/script/parser/newparser.lua b/script/parser/newparser.lua
index a84a5028..15d2d600 100644
--- a/script/parser/newparser.lua
+++ b/script/parser/newparser.lua
@@ -942,7 +942,7 @@ local function parseShortString()
         end
         if not token then
             stringIndex = stringIndex + 1
-            stringPool[stringIndex] = ssub(Lua, currentOffset)
+            stringPool[stringIndex] = ssub(Lua, currentOffset or -1)
             missSymbol(mark)
             break
         end