make more tests green

lib/pure/encodings.nim

@@ -36,7 +36,7 @@ when defined(windows):
     while i < a.len and j < b.len:
       if a[i] in {'-', '_'}: inc i
       if b[j] in {'-', '_'}: inc j
-      if a[i].toLower != b[j].toLower: return false
+      if i < a.len and j < b.len and a[i].toLowerAscii != b[j].toLowerAscii: return false
       inc i
       inc j
     result = i == a.len and j == b.len

lib/pure/ospaths.nim

@@ -477,7 +477,7 @@ proc unixToNativePath*(path: string, drive=""): string {.
 
     var i = start
     while i < len(path): # ../../../ --> ::::
-      if path[i] == '.' and path[i+1] == '.' and path[i+2] == '/':
+      if i+2 < path.len and path[i] == '.' and path[i+1] == '.' and path[i+2] == '/':
         # parent directory
         when defined(macos):
           if result[high(result)] == ':':

tests/concepts/tstackconcept.nim

@@ -31,7 +31,7 @@ type
     s.pop() is T
 
     type ValueType = T
-    const ValueTypeName = T.name.toUpper
+    const ValueTypeName = T.name.toUpperAscii
 
 proc genericAlgorithm[T](s: var Stack[T], y: T) =
   static:

tests/stdlib/twchartoutf8.nim

@@ -30,7 +30,6 @@ else:
     result = newString(size)
     let res = WideCharToMultiByte(CP_UTF8, 0'i32, cast[LPWCSTR](addr(wc[0])), wclen,
       cstring(result), size, cstring(nil), LPBOOL(nil))
-    result[size] = chr(0)
     doAssert size == res
 
   proc testCP(wc: WideCString, lo, hi: int) =

tests/vm/tcompiletimetable.nim

@@ -4,7 +4,6 @@ discard """
 4:2
 Got Hi
 Got Hey'''
-  disabled: "true"
 """
 
 # bug #404