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-rw-r--r--src/libexpr/eval.cc2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/libexpr/eval.cc b/src/libexpr/eval.cc
index ace0517fbf..22396865f0 100644
--- a/src/libexpr/eval.cc
+++ b/src/libexpr/eval.cc
@@ -293,6 +293,8 @@ EvalState::EvalState(const Strings & _searchPath, ref<Store> store)
     , sColumn(symbols.create("column"))
     , sFunctor(symbols.create("__functor"))
     , sToString(symbols.create("__toString"))
+    , sRight(symbols.create("right"))
+    , sWrong(symbols.create("wrong"))
     , store(store)
     , baseEnv(allocEnv(128))
     , staticBaseEnv(false, 0)