[FIX] Member might not be default initializable

include/seqan3/alignment/configuration/align_config_on_result.hpp

@@ -54,7 +54,7 @@ class on_result : private seqan3::pipeable_config_element
 {
 public:
     //!\brief The stored callable which will be invoked with the alignment result.
-    seqan3::detail::copyable_wrapper_t<callback_t> callback{}; // Allows lambdas with capture blocks.
+    seqan3::detail::copyable_wrapper_t<callback_t> callback; // Allows lambdas with capture blocks.
 
     /*!\name Constructors, destructor and assignment
      * \{

include/seqan3/alignment/matrix/detail/trace_matrix_full.hpp

@@ -289,7 +289,7 @@ class trace_matrix_full<trace_t>::iterator::column_proxy : public std::ranges::v
 {
 private:
     //!\brief The represented column.
-    matrix_column_type column{};
+    matrix_column_type column;
 
 public:
     /*!\name Constructor, assignment and destructor

include/seqan3/search/configuration/on_result.hpp

@@ -55,7 +55,7 @@ class on_result : private seqan3::pipeable_config_element
 {
 public:
     //!\brief The stored callable which will be invoked with the search result.
-    seqan3::detail::copyable_wrapper_t<callback_t> callback{}; // Allows lambdas with capture blocks.
+    seqan3::detail::copyable_wrapper_t<callback_t> callback; // Allows lambdas with capture blocks.
 
     /*!\name Constructors, destructor and assignment
      * \{

include/seqan3/utility/views/pairwise_combine.hpp

@@ -218,7 +218,7 @@ class pairwise_combine_view : public std::ranges::view_interface<pairwise_combin
 
 private:
     //!\brief The underling range.
-    underlying_range_type u_range{};
+    underlying_range_type u_range;
     //!\brief The cached iterator pointing to the last element of the underlying range.
     std::ranges::iterator_t<underlying_range_type> back_iterator{};
 };