[DF] Fix compilation of Foreach with mutable lambdas

This fixes root-project#8317.
oshadura · Jun 4, 2021 · 069afcc · 069afcc
1 parent d1c9706
commit 069afcc
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/tree/dataframe/inc/ROOT/RDF/InterfaceUtils.hxx b/tree/dataframe/inc/ROOT/RDF/InterfaceUtils.hxx
@@ -512,7 +512,7 @@ struct RMinReturnType<T, true> {
 template <typename R, typename F, typename... Args>
 std::function<R(unsigned int, Args...)> AddSlotParameter(F &f, TypeList<Args...>)
 {
-   return [f](unsigned int, Args... a) -> R { return f(a...); };
+   return [f](unsigned int, Args... a) mutable -> R { return f(a...); };
 }
 
 template <typename ColType, typename... Rest>