closes #5854

tests/arithm/tsubrange.nim

@@ -0,0 +1,13 @@
+discard """
+  output: '''1'''
+"""
+
+# bug #5854
+type
+  n16* = range[0'i16..high(int16)]
+
+var level: n16 = 1
+let maxLevel: n16 = 1
+
+level = min(level + 2, maxLevel)
+echo level

todo.txt

@@ -1,6 +1,7 @@
 version 1.0 battle plan
 =======================
 
+- eliminate 'nil' for seqs and strings
 - make 'not nil' the default (produce warnings instead of errors for
   a smooth migration path)
 - case objects needs to be safe and need to support pattern matching