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-rw-r--r--lib/system/gc.nim6
-rw-r--r--lib/system/gc_ms.nim6
2 files changed, 6 insertions, 6 deletions
diff --git a/lib/system/gc.nim b/lib/system/gc.nim
index 13778ee5e..a2ff72a30 100644
--- a/lib/system/gc.nim
+++ b/lib/system/gc.nim
@@ -945,10 +945,10 @@ when not defined(useNimRtl):
              "[GC] max cycle table size: " & $gch.stat.cycleTableSize & "\n" &
              "[GC] max pause time [ms]: " & $(gch.stat.maxPause div 1000_000) & "\n"
     when nimCoroutines:
-      result = result & "[GC] number of stacks: " & $gch.stack.len & "\n"
+      result.add "[GC] number of stacks: " & $gch.stack.len & "\n"
       for stack in items(gch.stack):
-        result = result & "[GC]   stack " & stack.bottom.repr & "[GC]     max stack size " & cast[pointer](stack.maxStackSize).repr & "\n"
+        result.add "[GC]   stack " & stack.bottom.repr & "[GC]     max stack size " & cast[pointer](stack.maxStackSize).repr & "\n"
     else:
-      result = result & "[GC] max stack size: " & $gch.stat.maxStackSize & "\n"
+      result.add "[GC] max stack size: " & $gch.stat.maxStackSize & "\n"
 
 {.pop.} # profiler: off, stackTrace: off
diff --git a/lib/system/gc_ms.nim b/lib/system/gc_ms.nim
index 494c32b1a..cfc0dfa8a 100644
--- a/lib/system/gc_ms.nim
+++ b/lib/system/gc_ms.nim
@@ -526,10 +526,10 @@ when not defined(useNimRtl):
              "[GC] max threshold: " & $gch.stat.maxThreshold & "\n" &
              "[GC] freed objects: " & $gch.stat.freedObjects & "\n"
     when nimCoroutines:
-      result = result & "[GC] number of stacks: " & $gch.stack.len & "\n"
+      result.add "[GC] number of stacks: " & $gch.stack.len & "\n"
       for stack in items(gch.stack):
-        result = result & "[GC]   stack " & stack.bottom.repr & "[GC]     max stack size " & $stack.maxStackSize & "\n"
+        result.add "[GC]   stack " & stack.bottom.repr & "[GC]     max stack size " & $stack.maxStackSize & "\n"
     else:
-      result = result & "[GC] max stack size: " & $gch.stat.maxStackSize & "\n"
+      result.add "[GC] max stack size: " & $gch.stat.maxStackSize & "\n"
 
 {.pop.}