Closes #6083, closes #6086, closes #6379 (#6392)

tests/vm/tvmmisc.nim

@@ -1,16 +1,66 @@
-
-
 # bug #4462
 import macros
 
+block:
   proc foo(t: typedesc) {.compileTime.} =
-  echo getType(t).treeRepr
+    assert sameType(getType(t), getType(int))
 
   static:
     foo(int)
 
 # #4412
+block:
   proc default[T](t: typedesc[T]): T {.inline.} = discard
 
   static:
     var x = default(type(0))
+
+# #6379
+static:
+  import algorithm
+  
+  var numArray = [1, 2, 3, 4, -1]
+  numArray.sort(cmp)
+  assert numArray == [-1, 1, 2, 3, 4]
+
+  var str = "cba"
+  str.sort(cmp)
+  assert str == "abc"
+
+# #6086
+import math, sequtils, future
+
+block:
+  proc f: int =
+    toSeq(10..<10_000).filter(
+      a => a == ($a).map(
+        d => (d.ord-'0'.ord).int^4
+      ).sum
+    ).sum
+
+  var a = f()
+  const b = f()
+
+  assert a == b
+
+block:
+  proc f(): seq[char] =
+    result = "hello".map(proc(x: char): char = x)
+
+  var runTime = f()
+  const compTime = f()
+  assert runTime == compTime
+
+# #6083
+block:
+  proc abc(): seq[int] =
+    result = @[0]
+    result.setLen(2)
+    var tmp: int
+      
+    for i in 0 .. <2:
+      inc tmp
+      result[i] = tmp
+
+  const fact1000 = abc()
+  assert fact1000 == @[1, 2]