The problem was that the loop in get_func_mm_tree()
accessed improperly initialized instances of String,
which resided in the bzero'ed part of the in_vector::base array.

Strings in in_vector::base are originally initialized
in Item_func_in::fix_length_and_dec(),
in in_vector::in_vector() using sql_calloc,
rather than using a String constructor, so their str_charset
members are originally equal to NULL.

Strings in in_vector::base are later initialized
to good values in Item_func_in::fix_length_and_dec(),
using array->set(), in this code:

      uint j=0;
      for (uint i=1 ; i < arg_count ; i++)
      {
        array->set(j,args[i]);
        if (!args[i]->null_value)                      // Skip NULL values
          j++;
        else
          have_null= 1;
      }
      if ((array->used_count= j))
        array->sort();

NULLs are not taken into account, so at the end
array->used_count can be smaller than array->count.

This patch fixes the loop in opt_range.cc, in get_func_mm_tree(),
to access only properly initialized elements in in_vector::base,
preventing access to its bzero'ed non-initialized tail.

item when drop table indexes or drop table;

Problem was that table and index statistics is removed from
persistent tables but not from memory cache. Added functions
to remove table and index statistics from memory cache.

        test failed on Windows so fixed by testing slightly differently.

The problem was earlier fixed by the patch for MDEV-9521.
Adding tests only.

        Changes to the mysql_install_db scripts so they don't repeat
        arguments twice.

        Check for same directories in the list added.

  modified:   storage/connect/tabtbl.cpp

- Add trace and make m_Stmt conditional
  modified:   storage/connect/myconn.cpp
  modified:   storage/connect/myconn.h

- Protect trace from null string (for Linux)
  modified:   storage/connect/tabcol.cpp

- Record error changes
  modified:   storage/connect/mysql-test/connect/r/jdbc_new.result

- Typo
  modified:   storage/connect/jdbconn.cpp
  modified:   storage/connect/jsonudf.cpp

The check inserts a DWARF directive to tell stack unwinding that the
bottom of the (co-routine) stack has been reached. Without this, stack
traces may attempt to continue past the bottom of the stack.

The GCC version check was incorrect, and failed to trigger for GCC
version 5.[0123].

Altering a comment or a default field's value needs "NO_LOCK", not EXCLUSIVE -
storage_engine test result updated

Update sponsors

MDEV-10118 : do not suggest upgrade from MySQL 5.7 to MariaDB 10.x in the installer. Do not lauch upgrade wizard after installation

  modified:   storage/connect/JdbcInterface.class
  modified:   storage/connect/JdbcInterface.java

- Ignore *.tlog and .res files
  modified:   .gitignore

  modified:   storage/connect/jdbconn.cpp

- Suppress GCC warning
  modified:   storage/connect/tabjdbc.cpp

Clang warns on this code because it is memsetting over a vtable contained in a
struct in the best_positions array. The diagnostic text is:

mariadb/sql/sql_select.cc:24462:10: error: destination for this 'memset' call is
a pointer to class containing a dynamic class 'Duplicate_weedout_picker'; vtable
pointer will be overwritten [-Werror,-Wdynamic-class-memaccess]
  memset(best_positions, 0, sizeof(POSITION) * (table_count + 1));
  ~~~~~~ ^

Patch contributed by David Gow.

as it fails on new builders.

msxml6 is found on all Windows we support, thus there is no reason to
search for it.

1.04.0006

5.6.29-76.2

5.6.30

in case of prelocking, don't check table->grant.privilege
in handler::external_lock(), do it in
handler::start_stmt().

Fixed memory leaks in gen_lex_hash.

take into account that agg_arg_charsets_for_comparison()
can replace Item_field's with Item_func_conv_charset

        Added SSL support to the mysqlbinlog.