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path: root/src/mbgl/style/expression/coercion.cpp
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-rw-r--r--src/mbgl/style/expression/coercion.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/mbgl/style/expression/coercion.cpp b/src/mbgl/style/expression/coercion.cpp
index 0166d144e0..11172a3668 100644
--- a/src/mbgl/style/expression/coercion.cpp
+++ b/src/mbgl/style/expression/coercion.cpp
@@ -71,6 +71,7 @@ Coercion::Coercion(type::Type type_, std::vector<std::unique_ptr<Expression>> in
Expression(std::move(type_)),
inputs(std::move(inputs_))
{
+ assert(!inputs.empty());
type::Type t = getType();
if (t.is<type::NumberType>()) {
coerceSingleValue = toNumber;