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-rw-r--r--tests/libsample/expression.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/tests/libsample/expression.cpp b/tests/libsample/expression.cpp
index f6eedaa77..bead4c16d 100644
--- a/tests/libsample/expression.cpp
+++ b/tests/libsample/expression.cpp
@@ -120,6 +120,7 @@ std::string Expression::toString() const
break;
case None: // just to avoid the compiler warning
default:
+ op = '?';
break;
}
result += op;