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  1. MariaDB Server
  2. MDEV-25876

Warning: Memory not freed: 8/16/32 on setting session_track_system_variables

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      Description

      SET GLOBAL session_track_system_variables='a';
      SHUTDOWN;
      

      Leads to:

      10.6.2 06dd151bb86ad5b87d4d46011f36da1289c01074 (Debug)

      2021-06-08 19:38:22 0 [Note] /test/MD050621-mariadb-10.6.2-linux-x86_64-dbg/bin/mysqld: Shutdown complete
       
      Warning: Memory not freed: 32
      Warning:   32 bytes lost at 0x14db2401b2e0, allocated by T@0 at 0x55c68baa843d, mysys/my_malloc.c:221, sql/sys_vars.ic:568, sql/set_var.cc:207, sql/set_var.cc:858, sql/set_var.cc:745, sql/sql_parse.cc:5027, sql/sql_parse.cc:8016
      Memory lost: 32 bytes in 1 chunks
      Warning:   32 bytes lost at 0x14db2401b2e0, allocated by T@0 at sql/sql_parse.cc:1897, mysys/my_malloc.c:221, sql/sys_vars.ic:568, sql/set_var.cc:207, sql/set_var.cc:858, sql/set_var.cc:745, sql/sql_parse.cc:5027, sql/sql_parse.cc:8016
      Memory lost: 32 bytes in 1 chunks
      

      Bug present in 10.2-10.6 both opt and dbg.

      The memory loss size has changed over time. 10.2 Debug gives:

      10.2.38 (Debug)

      2021-06-08 19:43:51 23053458228992 [Note] /test/MD270421-mariadb-10.2.38-linux-x86_64-dbg/bin/mysqld: Shutdown complete
       
      Warning: Memory not freed: 8
      Warning:    8 bytes lost at 0x14f748008b70, allocated by T@0 at mysys/my_malloc.c:229, sql/sys_vars.ic:527, sql/set_var.cc:208, sql/set_var.cc:837, sql/set_var.cc:738, sql/sql_parse.cc:4644, sql/sql_parse.cc:7796, sql/sql_parse.cc:1827
      Memory lost: 8 bytes in 1 chunks
      Warning:    8 bytes lost at 0x14f748008b70, allocated by T@0 at mysys/my_malloc.c:229, sql/sys_vars.ic:527, sql/set_var.cc:208, sql/set_var.cc:837, sql/set_var.cc:738, sql/sql_parse.cc:4644, sql/sql_parse.cc:7796, sql/sql_parse.cc:1827
      Memory lost: 8 bytes in 1 chunks
      

      And 10.3 optimized (10.3 debug also has 8 bytes):
      2021-06-08 19:45:50 0 [Note] /test/MD270421-mariadb-10.3.29-linux-x86_64-opt/bin/mysqld: Shutdown complete

      10.3.29 4d412e9854ccb3676a9a51a002fbcc6b44a26294 (Optimized)

      Warning: Memory not freed: 16
      

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            Assignee:
            sanja Oleksandr Byelkin
            Reporter:
            Roel Roel Van de Paar
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              Dates

              Created:
              Updated:

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