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counter: fix NPE on nullable element to_s
[nit.git]
/
lib
/
counter.nit
diff --git
a/lib/counter.nit
b/lib/counter.nit
index
ceecb48
..
ceb9896
100644
(file)
--- a/
lib/counter.nit
+++ b/
lib/counter.nit
@@
-133,6
+133,7
@@
class Counter[E]
# @toimplement by default just call `to_s` on the element
protected fun element_to_s(e: E): String
do
+ if e == null then return "null"
return e.to_s
end