fixes #10271 [backport]

(cherry picked from commit 451377f)
nim-lang · Jan 14, 2019 · 98cdfe0 · 98cdfe0
1 parent efa7521
commit 98cdfe0
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/lib/system/gc_ms.nim b/lib/system/gc_ms.nim
@@ -497,8 +497,9 @@ proc collectCTBody(gch: var GcHeap) =
   sysAssert(allocInv(gch.region), "collectCT: end")
 
 proc collectCT(gch: var GcHeap; size: int) =
+  let fmem = getFreeMem(gch.region)
   if (getOccupiedMem(gch.region) >= gch.cycleThreshold or
-      size > getFreeMem(gch.region)) and gch.recGcLock == 0:
+      size > fmem and fmem > InitialThreshold) and gch.recGcLock == 0:
     collectCTBody(gch)
 
 when not defined(useNimRtl):