bugfix: 'defined/compiles' open an implicit mixin scope in generics

lib/pure/actors.nim

@@ -51,7 +51,7 @@ proc inbox*[TIn, TOut](self: PActor[TIn, TOut]): ptr TChannel[TIn] =
   ## gets a pointer to the associated inbox of the actor `self`.
   result = addr(self.i)
 
-proc running*[TIn, TOut](a: PActor[TIn, TOut]) =
+proc running*[TIn, TOut](a: PActor[TIn, TOut]): bool =
   ## returns true if the actor `a` is running.
   result = running(a.t)
 

lib/pure/nimprof.nim

@@ -169,12 +169,14 @@ var
   disabled: int
 
 proc disableProfiling*() =
-  atomicDec disabled
-  system.profilerHook = nil
+  when defined(system.TStackTrace):
+    atomicDec disabled
+    system.profilerHook = nil
 
 proc enableProfiling*() =
-  if atomicInc(disabled) >= 0:
-    system.profilerHook = hook
+  when defined(system.TStackTrace):
+    if atomicInc(disabled) >= 0:
+      system.profilerHook = hook
 
 when defined(system.TStackTrace):
   system.profilerHook = hook