diff --git a/client/mysql.cc b/client/mysql.cc
index e15dd907911..5beff40d982 100644
--- a/client/mysql.cc
+++ b/client/mysql.cc
@@ -2300,10 +2300,7 @@ static int read_and_execute(bool interactive)
         the readline/libedit library.
       */
       if (line)
-      {
         free(line);
-        glob_buffer.length(0);
-      }
       line= readline(prompt);
 #ifdef USE_LIBEDIT_INTERFACE
       /*
diff --git a/cmake/libfmt.cmake b/cmake/libfmt.cmake
index 70b6a07216f..da3479424b1 100644
--- a/cmake/libfmt.cmake
+++ b/cmake/libfmt.cmake
@@ -1,4 +1,4 @@
-INCLUDE (CheckCXXSourceCompiles)
+INCLUDE (CheckCXXSourceRuns)
 INCLUDE (ExternalProject)
 
 SET(WITH_LIBFMT "auto" CACHE STRING
@@ -27,17 +27,15 @@ ENDMACRO()
 MACRO (CHECK_LIBFMT)
   IF(WITH_LIBFMT STREQUAL "system" OR WITH_LIBFMT STREQUAL "auto")
     SET(CMAKE_REQUIRED_INCLUDES ${LIBFMT_INCLUDE_DIR})
-    CHECK_CXX_SOURCE_COMPILES(
+    CHECK_CXX_SOURCE_RUNS(
     "#define FMT_STATIC_THOUSANDS_SEPARATOR ','
      #define FMT_HEADER_ONLY 1
      #include <fmt/format-inl.h>
-     #include <iostream>
      int main() {
-       int answer= 42;
+       int answer= 4321;
        fmt::format_args::format_arg arg=
          fmt::detail::make_arg<fmt::format_context>(answer);
-         std::cout << fmt::vformat(\"The answer is {}.\",
-                                   fmt::format_args(&arg, 1));
+       return fmt::vformat(\"{:L}\", fmt::format_args(&arg, 1)).compare(\"4,321\");
      }" HAVE_SYSTEM_LIBFMT)
     SET(CMAKE_REQUIRED_INCLUDES)
   ENDIF()
diff --git a/cmake/pcre.cmake b/cmake/pcre.cmake
index c2eb26074ac..3c427b881fc 100644
--- a/cmake/pcre.cmake
+++ b/cmake/pcre.cmake
@@ -81,18 +81,15 @@ MACRO (CHECK_PCRE)
       FIND_PACKAGE(PkgConfig QUIET)
       PKG_CHECK_MODULES(PCRE libpcre2-8)
       # in case pkg-config or libpcre2-8.pc is not installed:
-      IF(NOT PCRE_FOUND)
-        UNSET(PCRE_FOUND CACHE)
-        CHECK_LIBRARY_EXISTS(pcre2-8 pcre2_match_8 "" PCRE_FOUND)
-      ENDIF()
+      CHECK_LIBRARY_EXISTS(pcre2-8 pcre2_match_8 "${PCRE_LIBRARY_DIRS}" HAVE_PCRE2_MATCH_8)
     ENDIF()
-    IF(NOT PCRE_FOUND OR WITH_PCRE STREQUAL "bundled")
+    IF(NOT HAVE_PCRE2_MATCH_8 OR WITH_PCRE STREQUAL "bundled")
       IF (WITH_PCRE STREQUAL "system")
         MESSAGE(FATAL_ERROR "system pcre2-8 library is not found or unusable")
       ENDIF()
       BUNDLE_PCRE2()
     ELSE()
-      CHECK_LIBRARY_EXISTS(pcre2-posix PCRE2regcomp "" NEEDS_PCRE2_DEBIAN_HACK)
+      CHECK_LIBRARY_EXISTS(pcre2-posix PCRE2regcomp "${PCRE_LIBRARY_DIRS}" NEEDS_PCRE2_DEBIAN_HACK)
       IF(NEEDS_PCRE2_DEBIAN_HACK)
         SET(PCRE2_DEBIAN_HACK "-Dregcomp=PCRE2regcomp -Dregexec=PCRE2regexec -Dregerror=PCRE2regerror -Dregfree=PCRE2regfree")
       ENDIF()
diff --git a/mysql-test/main/mysql-interactive.result b/mysql-test/main/mysql-interactive.result
new file mode 100644
index 00000000000..a18c018b932
--- /dev/null
+++ b/mysql-test/main/mysql-interactive.result
@@ -0,0 +1,24 @@
+#
+# regression introduced by MDEV-14448
+#
+delimiter $
+select 1;
+$
+Welcome to the MariaDB monitor.  Commands end with ; or \g.
+Your MariaDB connection id is X
+Server version: Y
+Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
+
+Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
+
+MariaDB [(none)]> delimiter $
+MariaDB [(none)]> select 1;
+    -> $
++---+
+| 1 |
++---+
+| 1 |
++---+
+1 row in set
+
+MariaDB [(none)]> 
\ No newline at end of file
diff --git a/mysql-test/main/mysql-interactive.test b/mysql-test/main/mysql-interactive.test
new file mode 100644
index 00000000000..2015e9d667d
--- /dev/null
+++ b/mysql-test/main/mysql-interactive.test
@@ -0,0 +1,29 @@
+--echo #
+--echo # regression introduced by MDEV-14448
+--echo #
+source include/not_embedded.inc;
+source include/not_windows.inc;
+
+error 0,1;
+exec $MYSQL -V|grep -q readline;
+if ($sys_errno == 1)
+{
+  # strangely enough
+  skip does not work with libedit;
+}
+
+write_file $MYSQL_TMP_DIR/mysql_in;
+delimiter $
+select 1;
+$
+EOF
+let TERM=dumb;
+replace_regex /id is \d+/id is X/ /Server version: .*/Server version: Y/ / \(\d+\.\d+ sec\)//;
+error 0,127;
+exec socat EXEC:"$MYSQL",pty STDIO < $MYSQL_TMP_DIR/mysql_in;
+if ($sys_errno == 127)
+{
+  remove_file $MYSQL_TMP_DIR/mysql_in;
+  skip no socat;
+}
+remove_file $MYSQL_TMP_DIR/mysql_in;
diff --git a/mysql-test/suite/funcs_1/views/views_master.inc b/mysql-test/suite/funcs_1/views/views_master.inc
index a9203529f21..0e175db4d29 100644
--- a/mysql-test/suite/funcs_1/views/views_master.inc
+++ b/mysql-test/suite/funcs_1/views/views_master.inc
@@ -3085,8 +3085,10 @@ eval SHOW CREATE VIEW test1.v$level;
 # the following line as written as '--eror ER_TOO_MANY_TABLES' and the command
 # is successful so assuming no expected error was intended
 # --error ER_TOO_MANY_TABLES
+--disable_ps2_protocol
 eval SELECT CAST(f1 AS SIGNED INTEGER) AS f1,
             CAST(f2 AS CHAR) AS f2 FROM test1.v$level;
+--enable_ps2_protocol
 let $message= The output of following EXPLAIN is deactivated, because the result
               differs on some platforms
               FIXME Is this a bug ? ;
@@ -3116,16 +3118,20 @@ SELECT f1 as f2, f2 as f1 FROM test2.t1;
 CREATE OR REPLACE VIEW test2.v0 AS
 SELECT CAST('0001-01-01' AS DATE) as f1, f2 FROM test3.t1;
 eval SHOW CREATE VIEW test1.v$toplevel;
+--disable_ps2_protocol
 eval SELECT CAST(f1 AS SIGNED INTEGER) AS f1,
             CAST(f2 AS CHAR) AS f2 FROM test1.v$toplevel;
+--enable_ps2_protocol
 eval EXPLAIN SELECT CAST(f1 AS SIGNED INTEGER) AS f1,
                    CAST(f2 AS CHAR) AS f2 FROM test1.v$toplevel;
 # 2.3.3 UCS2 string instead of common string
 CREATE OR REPLACE VIEW test3.v0 AS
 SELECT f1 , CONVERT('ßÄäÖöÜü§' USING UCS2) as f2 FROM test1.t1;
 eval SHOW CREATE VIEW test1.v$toplevel;
+--disable_ps2_protocol
 eval SELECT CAST(f1 AS SIGNED INTEGER) AS f1,
             CAST(f2 AS CHAR) AS f2 FROM test1.v$toplevel;
+--enable_ps2_protocol
 eval EXPLAIN SELECT CAST(f1 AS SIGNED INTEGER) AS f1,
                    CAST(f2 AS CHAR) AS f2 FROM test1.v$toplevel;
 
@@ -3133,8 +3139,10 @@ eval EXPLAIN SELECT CAST(f1 AS SIGNED INTEGER) AS f1,
 CREATE OR REPLACE VIEW test3.v0 AS
 SELECT CONVERT('ßÄäÖöÜü§' USING UCS2) as f1, f2 FROM test1.t1;
 eval SHOW CREATE VIEW test1.v$toplevel;
+--disable_ps2_protocol
 eval SELECT CAST(f1 AS SIGNED INTEGER) AS f1,
             CAST(f2 AS CHAR) AS f2 FROM test1.v$toplevel;
+--enable_ps2_protocol
 eval EXPLAIN SELECT CAST(f1 AS SIGNED INTEGER) AS f1,
                    CAST(f2 AS CHAR) AS f2 FROM test1.v$toplevel;
 --enable_result_log
diff --git a/mysql-test/suite/rpl/r/rpl_mariadb_slave_capability.result b/mysql-test/suite/rpl/r/rpl_mariadb_slave_capability.result
index 68e8b22dd02..fddb07c9cbf 100644
--- a/mysql-test/suite/rpl/r/rpl_mariadb_slave_capability.result
+++ b/mysql-test/suite/rpl/r/rpl_mariadb_slave_capability.result
@@ -6,6 +6,11 @@ connection slave;
 include/stop_slave.inc
 CHANGE MASTER TO MASTER_USE_GTID=NO;
 include/start_slave.inc
+connection master;
+# Ensure only the new binlog dump thread is alive (wait for the old one
+# to complete its kill)
+# And that it has already sent its fake rotate
+connection slave;
 include/stop_slave.inc
 # Test slave with no capability gets dummy event, which is ignored.
 set @old_dbug= @@global.debug_dbug;
diff --git a/mysql-test/suite/rpl/t/rpl_mariadb_slave_capability.test b/mysql-test/suite/rpl/t/rpl_mariadb_slave_capability.test
index 9caa696ecbb..c3a7055de6d 100644
--- a/mysql-test/suite/rpl/t/rpl_mariadb_slave_capability.test
+++ b/mysql-test/suite/rpl/t/rpl_mariadb_slave_capability.test
@@ -18,6 +18,17 @@ sync_slave_with_master;
 CHANGE MASTER TO MASTER_USE_GTID=NO;
 --source include/start_slave.inc
 
+--connection master
+--echo # Ensure only the new binlog dump thread is alive (wait for the old one
+--echo # to complete its kill)
+--let $wait_condition= select count(*)=1 from information_schema.processlist where command='Binlog Dump'
+--source include/wait_condition.inc
+
+--echo # And that it has already sent its fake rotate
+--let $wait_condition= select count(*)=1 from information_schema.processlist where state LIKE '%Master has sent all binlog to slave%' and command='Binlog Dump'
+--source include/wait_condition.inc
+
+--connection slave
 --source include/stop_slave.inc
 --echo # Test slave with no capability gets dummy event, which is ignored.
 set @old_dbug= @@global.debug_dbug;
diff --git a/sql/item_strfunc.h b/sql/item_strfunc.h
index c5526e43a46..5a3c2cbf60a 100644
--- a/sql/item_strfunc.h
+++ b/sql/item_strfunc.h
@@ -450,7 +450,6 @@ public:
     Item_str_func(thd, org, find, replace) {}
   String *val_str(String *to) override { return val_str_internal(to, false); };
   bool fix_length_and_dec(THD *thd) override;
-  String *val_str_internal(String *str, String *empty_string_for_null);
   const Schema *schema() const override { return &mariadb_schema; }
   void print(String *str, enum_query_type query_type) override
   {
diff --git a/sql/sql_lex.cc b/sql/sql_lex.cc
index 9492ff087ae..de92944a00f 100644
--- a/sql/sql_lex.cc
+++ b/sql/sql_lex.cc
@@ -4787,9 +4787,12 @@ void st_select_lex::fix_prepare_information(THD *thd, Item **conds,
   {
     Query_arena_stmt on_stmt_arena(thd);
     changed_elements|= TOUCHED_SEL_COND;
+    /*
+      TODO: return after MDEV-33218 fix
     DBUG_ASSERT(
       active_arena->is_stmt_prepare_or_first_stmt_execute() ||
       active_arena->state == Query_arena::STMT_SP_QUERY_ARGUMENTS);
+    */
     if (group_list.first)
     {
       if (!group_list_ptrs)
diff --git a/storage/columnstore/columnstore b/storage/columnstore/columnstore
index fcd637addcf..07e7301631a 160000
--- a/storage/columnstore/columnstore
+++ b/storage/columnstore/columnstore
@@ -1 +1 @@
-Subproject commit fcd637addcfbe0e9c55ebfc83303e8415cda8e96
+Subproject commit 07e7301631a5ac5ce86c3449d539eb4856119e1c
diff --git a/storage/spider/mysql-test/spider/bugfix/disabled.def b/storage/spider/mysql-test/spider/bugfix/disabled.def
index 62605347130..9009cd2565d 100644
--- a/storage/spider/mysql-test/spider/bugfix/disabled.def
+++ b/storage/spider/mysql-test/spider/bugfix/disabled.def
@@ -2,3 +2,4 @@ wait_timeout : MDEV-26045
 mdev_29676 : MDEV-31138
 mdev_27239: MDEV-32046
 mdev_27575 : MDEV-32997
+mdev_28739_simple : MDEV-33343