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-rw-r--r--src/interp/category.boot2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/interp/category.boot b/src/interp/category.boot
index d9250a22..63e42c75 100644
--- a/src/interp/category.boot
+++ b/src/interp/category.boot
@@ -408,7 +408,7 @@ DescendantP(a,b) ==
--% The implementation of Join
JoinInner(l,$e) ==
- $NewCatVec: local
+ $NewCatVec: local := nil
CondList:= nil
for u in l repeat
for at in u.2 repeat