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-rw-r--r--030container.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/030container.cc b/030container.cc
index 6a063658..0db73c1d 100644
--- a/030container.cc
+++ b/030container.cc
@@ -517,7 +517,7 @@ container bar [
 $error: 0
 
 :(after "Begin Transforms")
-Transform.push_back(check_or_set_invalid_types);
+Transform.push_back(check_or_set_invalid_types);  // idempotent
 
 :(code)
 void check_or_set_invalid_types(const recipe_ordinal r) {