fixes #5966

lib/pure/math.nim

@@ -413,10 +413,13 @@ proc `mod`*[T: float32|float64](x, y: T): T =
 {.pop.}
 {.pop.}
 
-proc `^`*[T](x, y: T): T =
+proc `^`*[T](x: T, y: Natural): T =
   ## Computes ``x`` to the power ``y`. ``x`` must be non-negative, use
   ## `pow <#pow,float,float>` for negative exponents.
+  when compiles(y >= T(0)):
     assert y >= T(0)
+  else:
+    assert T(y) >= T(0)
   var (x, y) = (x, y)
   result = 1
 

lib/pure/random.nim

@@ -123,7 +123,8 @@ when not defined(nimscript):
       proc getMil(t: Time): int {.importcpp: "getTime", nodecl.}
       randomize(getMil times.getTime())
     else:
-      randomize(int times.getTime())
+      let time = int(times.epochTime() * 1_000_000_000)
+      randomize(time)
 
 {.pop.}
 

tests/stdlib/tmath.nim

@@ -1,4 +1,15 @@
-import math, random
+discard """
+  action: run
+  output: '''[Suite] random int
+
+[Suite] random float
+
+[Suite] ^
+
+'''
+"""
+
+import math, random, os
 import unittest
 import sets
 
@@ -26,6 +37,7 @@ suite "random int":
   test "randomize() again gives new numbers":
     randomize()
     var rand1 = random(1000000)
+    os.sleep(200)
     randomize()
     var rand2 = random(1000000)
     check rand1 != rand2
@@ -55,7 +67,16 @@ suite "random float":
   test "randomize() again gives new numbers":
     randomize()
     var rand1:float = random(1000000.0)
+    os.sleep(200)
     randomize()
     var rand2:float = random(1000000.0)
     check rand1 != rand2
 
+suite "^":
+  test "compiles for valid types":
+    check: compiles(5 ^ 2)
+    check: compiles(5.5 ^ 2)
+    check: compiles(5.5 ^ 2.int8)
+    check: compiles(5.5 ^ 2.uint)
+    check: compiles(5.5 ^ 2.uint8)
+    check: not compiles(5.5 ^ 2.2)