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model: add `MSignature::mparameter_by_name`
[nit.git]
/
lib
/
ai
/
backtrack.nit
diff --git
a/lib/ai/backtrack.nit
b/lib/ai/backtrack.nit
index
550df10
..
ddc68ef
100644
(file)
--- a/
lib/ai/backtrack.nit
+++ b/
lib/ai/backtrack.nit
@@
-209,6
+209,7
@@
class BacktrackSolver[S: Object, A]
problem.backtrack(state, a)
node = node.parent
+ assert node != null
continue
end