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-rw-r--r--lib/system/inclrtl.nim2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/system/inclrtl.nim b/lib/system/inclrtl.nim
index 6bff819e6..33b8545c4 100644
--- a/lib/system/inclrtl.nim
+++ b/lib/system/inclrtl.nim
@@ -50,5 +50,7 @@ else:
   {.pragma: benign, gcsafe.}
 
 template since(version, body: untyped) {.dirty.} =
+  ## limitation: can't be used to annotate a template (eg typetraits.get), would
+  ## error: cannot attach a custom pragma.
   when version <= (NimMajor, NimMinor):
     body