Uploaded image for project: 'MariaDB Server'
  1. MariaDB Server
  2. MDEV-13180

Unused left join causes server crash

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    Description

      The following queries cause a server crash for the latest versions of MariaDB from 5.5 to 10.3.

      I've tested it against the TGZ version of 10.0.28 and the Docker versions of 5.5.56, 10.0.31, 10.1.24, 10.2.6, and 10.3.0.

      It seems to be a MariaDB-specific issue as the same queries don't result in a crash in the Docker versions of MySQL 5.6 and 5.7 and Percona 5.6.

      CREATE DATABASE IF NOT EXISTS `test`;
       
      USE `test`;
       
      CREATE TABLE
          `test1`
      SELECT
          1
      ;
       
      CREATE TABLE
          `test2`
          (
              `effdt` datetime NOT NULL,
              `column` enum('TEST') NOT NULL
          )
      ;
       
      INSERT INTO
          `test2`
          (`effdt`,`column`)
      VALUES
          ('1900-01-01 00:00:00', 'TEST')
      ;
       
      SELECT
          1
      FROM
          `test1` a
              LEFT JOIN
          `test2` b
              ON
                  b.`effdt` = (
                      SELECT
                          MAX(b.`effdt`)
                      FROM
                          `test2` b_t
                      WHERE
                          b_t.`column` = b.`column`
                  )
      

      docker-maria-5.5.56

      Version: '5.5.56-MariaDB-1~wheezy'  socket: '/var/run/mysqld/mysqld.sock'  port: 3306  mariadb.org binary distribution
      170626 20:45:09 [ERROR] mysqld got signal 11 ;
      This could be because you hit a bug. It is also possible that this binary
      or one of the libraries it was linked against is corrupt, improperly built,
      or misconfigured. This error can also be caused by malfunctioning hardware.
       
      To report this bug, see http://kb.askmonty.org/en/reporting-bugs
       
      We will try our best to scrape up some info that will hopefully help
      diagnose the problem, but since we have already crashed, 
      something is definitely wrong and this may fail.
       
      Server version: 5.5.56-MariaDB-1~wheezy
      key_buffer_size=134217728
      read_buffer_size=2097152
      max_used_connections=1
      max_threads=102
      thread_count=1
      It is possible that mysqld could use up to 
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 759561 K  bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.
       
      Thread pointer: 0x7fe72dc06000
      Attempting backtrace. You can use the following information to find out
      where mysqld died. If you see no messages after this, something went
      terribly wrong...
      stack_bottom = 0x7fe754f25e40 thread_stack 0x48000
      mysqld(my_print_stacktrace+0x2b)[0x55c9428b521b]
      mysqld(handle_fatal_signal+0x422)[0x55c9424ea382]
      /lib/x86_64-linux-gnu/libpthread.so.0(+0xf0a0)[0x7fe754b880a0]
      mysqld(_ZN14Item_subselect30enumerate_field_refs_processorEPh+0x44)[0x55c9425636b4]
      mysqld(_ZN20Dep_analysis_context27setup_equality_modules_depsEP4ListI10Dep_moduleE+0x13d)[0x55c94249bc2d]
      mysqld(+0x4901a4)[0x55c94249c1a4]
      mysqld(+0x4902ba)[0x55c94249c2ba]
      mysqld(+0x3e7ba2)[0x55c9423f3ba2]
      mysqld(_ZN4JOIN8optimizeEv+0x7c1)[0x55c9423f5a91]
      mysqld(_Z12mysql_selectP3THDPPP4ItemP10TABLE_LISTjR4ListIS1_ES2_jP8st_orderSB_S2_SB_yP13select_resultP18st_select_lex_unitP13st_select_lex+0xd4)[0x55c9423f8044]
      mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0x2c3)[0x55c9423fee73]
      mysqld(+0x39b4b1)[0x55c9423a74b1]
      mysqld(_Z21mysql_execute_commandP3THD+0x1bcd)[0x55c9423aed2d]
      mysqld(+0x3a7057)[0x55c9423b3057]
      mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0x1b51)[0x55c9423b54e1]
      mysqld(_Z24do_handle_one_connectionP3THD+0x22b)[0x55c94246bdeb]
      mysqld(handle_one_connection+0x51)[0x55c94246be71]
      /lib/x86_64-linux-gnu/libpthread.so.0(+0x6b50)[0x7fe754b7fb50]
      /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7fe75348bfbd]
       
      Trying to get some variables.
      Some pointers may be invalid and cause the dump to abort.
      Query (0x7fe72001f018): SELECT     1 FROM     `test1` a         LEFT JOIN     `test2` b         ON             b.`effdt` = (                 SELECT                     MAX(b.`effdt`)                 FROM                     `test2` b_t                 WHERE                     b_t.`column` = b.`column`             )
      Connection ID (thread ID): 1
      Status: NOT_KILLED
       
      Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=off
       
      The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
      

      docker-maria-10.0.31

      Version: '10.0.31-MariaDB-1~jessie'  socket: '/var/run/mysqld/mysqld.sock'  port: 3306  mariadb.org binary distribution
      170626 20:24:46 [ERROR] mysqld got signal 11 ;
      This could be because you hit a bug. It is also possible that this binary
      or one of the libraries it was linked against is corrupt, improperly built,
      or misconfigured. This error can also be caused by malfunctioning hardware.
       
      To report this bug, see https://mariadb.com/kb/en/reporting-bugs
       
      We will try our best to scrape up some info that will hopefully help
      diagnose the problem, but since we have already crashed, 
      something is definitely wrong and this may fail.
       
      Server version: 10.0.31-MariaDB-1~jessie
      key_buffer_size=134217728
      read_buffer_size=2097152
      max_used_connections=1
      max_threads=102
      thread_count=1
      It is possible that mysqld could use up to 
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 759763 K  bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.
       
      Thread pointer: 0x7f33c9ff5008
      Attempting backtrace. You can use the following information to find out
      where mysqld died. If you see no messages after this, something went
      terribly wrong...
      stack_bottom = 0x7f33f142be88 thread_stack 0x48000
      mysqld(my_print_stacktrace+0x2e)[0xbc576e]
      mysqld(handle_fatal_signal+0x3af)[0x73860f]
      /lib/x86_64-linux-gnu/libpthread.so.0(+0xf890)[0x7f33f108c890]
      mysqld(_ZN14Item_subselect30enumerate_field_refs_processorEPh+0x28)[0x7bd4e8]
      mysqld[0x6d4fad]
      mysqld[0x6d51da]
      mysqld[0x60f88a]
      mysqld[0x617933]
      mysqld(_ZN4JOIN8optimizeEv+0x11b)[0x61a08b]
      mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0xa52)[0x61e022]
      mysqld[0x5baa4b]
      mysqld(_Z21mysql_execute_commandP3THD+0x4e3f)[0x5c673f]
      mysqld(_Z11mysql_parseP3THDPcjP12Parser_state+0x1ca)[0x5c83ba]
      mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0x1559)[0x5c9ea9]
      mysqld(_Z24do_handle_one_connectionP3THD+0x25b)[0x6993ab]
      mysqld(handle_one_connection+0x39)[0x6993f9]
      /lib/x86_64-linux-gnu/libpthread.so.0(+0x8064)[0x7f33f1085064]
      /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7f33ef68b62d]
       
      Trying to get some variables.
      Some pointers may be invalid and cause the dump to abort.
      Query (0x7f33b9020020): SELECT     1 FROM     `test1` a         LEFT JOIN     `test2` b         ON             b.`effdt` = (                 SELECT                     MAX(b.`effdt`)                 FROM                     `test2` b_t                 WHERE                     b_t.`column` = b.`column`             )
      Connection ID (thread ID): 2
      Status: NOT_KILLED
       
      Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=on,exists_to_in=on
       
      The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
      information that should help you find out what is causing the crash.
      

      docker-maria-10.1.24

      Version: '10.1.24-MariaDB-1~jessie'  socket: '/var/run/mysqld/mysqld.sock'  port: 3306  mariadb.org binary distribution
      170626 20:25:21 [ERROR] mysqld got signal 11 ;
      This could be because you hit a bug. It is also possible that this binary
      or one of the libraries it was linked against is corrupt, improperly built,
      or misconfigured. This error can also be caused by malfunctioning hardware.
       
      To report this bug, see https://mariadb.com/kb/en/reporting-bugs
       
      We will try our best to scrape up some info that will hopefully help
      diagnose the problem, but since we have already crashed, 
      something is definitely wrong and this may fail.
       
      Server version: 10.1.24-MariaDB-1~jessie
      key_buffer_size=134217728
      read_buffer_size=2097152
      max_used_connections=1
      max_threads=102
      thread_count=1
      It is possible that mysqld could use up to 
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 759836 K  bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.
       
      Thread pointer: 0x7ff0b625a008
      Attempting backtrace. You can use the following information to find out
      where mysqld died. If you see no messages after this, something went
      terribly wrong...
      stack_bottom = 0x7ff0b983c1f8 thread_stack 0x48400
      mysqld(my_print_stacktrace+0x2e)[0x564c0deacb1e]
      mysqld(handle_fatal_signal+0x2fd)[0x564c0d9e55cd]
      /lib/x86_64-linux-gnu/libpthread.so.0(+0xf890)[0x7ff0b94f2890]
      mysqld(_ZN14Item_subselect30enumerate_field_refs_processorEPh+0x28)[0x564c0da68e68]
      mysqld(_ZN20Dep_analysis_context27setup_equality_modules_depsEP4ListI10Dep_moduleE+0x132)[0x564c0d96b572]
      mysqld(+0x52f4c5)[0x564c0d96c4c5]
      mysqld(+0x52f5df)[0x564c0d96c5df]
      mysqld(+0x46b19e)[0x564c0d8a819e]
      mysqld(_ZN4JOIN14optimize_innerEv+0x7be)[0x564c0d8b068e]
      mysqld(_ZN4JOIN8optimizeEv+0x29)[0x564c0d8b2f59]
      mysqld(_Z12mysql_selectP3THDPPP4ItemP10TABLE_LISTjR4ListIS1_ES2_jP8st_orderSB_S2_SB_yP13select_resultP18st_select_lex_unitP13st_select_lex+0x8ee)[0x564c0d8b38fe]
      mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0x141)[0x564c0d8b3ae1]
      mysqld(+0x414b51)[0x564c0d851b51]
      mysqld(_Z21mysql_execute_commandP3THD+0x5e83)[0x564c0d85dcc3]
      mysqld(_Z11mysql_parseP3THDPcjP12Parser_state+0x275)[0x564c0d860f35]
      mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0x1c99)[0x564c0d8639d9]
      mysqld(_Z10do_commandP3THD+0x14e)[0x564c0d8640fe]
      mysqld(_Z24do_handle_one_connectionP3THD+0x182)[0x564c0d92fcd2]
      mysqld(handle_one_connection+0x40)[0x564c0d92fe70]
      /lib/x86_64-linux-gnu/libpthread.so.0(+0x8064)[0x7ff0b94eb064]
      /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7ff0b769562d]
       
      Trying to get some variables.
      Some pointers may be invalid and cause the dump to abort.
      Query (0x7ff07e421020): SELECT     1 FROM     `test1` a         LEFT JOIN     `test2` b         ON             b.`effdt` = (                 SELECT                     MAX(b.`effdt`)                 FROM                     `test2` b_t                 WHERE                     b_t.`column` = b.`column`             )
      Connection ID (thread ID): 2
      Status: NOT_KILLED
       
      Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=off
       
      The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
      information that should help you find out what is causing the crash.
      

      docker-maria-10.2.6

      Version: '10.2.6-MariaDB-10.2.6+maria~jessie'  socket: '/var/run/mysqld/mysqld.sock'  port: 3306  mariadb.org binary distribution
      170626 20:28:56 [ERROR] mysqld got signal 11 ;
      This could be because you hit a bug. It is also possible that this binary
      or one of the libraries it was linked against is corrupt, improperly built,
      or misconfigured. This error can also be caused by malfunctioning hardware.
       
      To report this bug, see https://mariadb.com/kb/en/reporting-bugs
       
      We will try our best to scrape up some info that will hopefully help
      diagnose the problem, but since we have already crashed, 
      something is definitely wrong and this may fail.
       
      Server version: 10.2.6-MariaDB-10.2.6+maria~jessie
      key_buffer_size=134217728
      read_buffer_size=2097152
      max_used_connections=1
      max_threads=102
      thread_count=7
      It is possible that mysqld could use up to 
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 759887 K  bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.
       
      Thread pointer: 0x7fc9780009a8
      Attempting backtrace. You can use the following information to find out
      where mysqld died. If you see no messages after this, something went
      terribly wrong...
      stack_bottom = 0x7fc9c63bce38 thread_stack 0x49000
      mysqld(my_print_stacktrace+0x2e)[0x5589d77b1a5e]
      mysqld(handle_fatal_signal+0x305)[0x5589d71f24f5]
      /lib/x86_64-linux-gnu/libpthread.so.0(+0xf890)[0x7fc9ebd3e890]
      mysqld(_ZN14Item_subselect30enumerate_field_refs_processorEPv+0x28)[0x5589d7290d68]
      mysqld(_ZN20Dep_analysis_context27setup_equality_modules_depsEP4ListI10Dep_moduleE+0x13b)[0x5589d716543b]
      mysqld(+0x5eb42d)[0x5589d716642d]
      mysqld(+0x5eb55f)[0x5589d716655f]
      mysqld(+0x522bcb)[0x5589d709dbcb]
      mysqld(_ZN4JOIN14optimize_innerEv+0xa25)[0x5589d70a5365]
      mysqld(_ZN4JOIN8optimizeEv+0x33)[0x5589d70a7943]
      mysqld(_Z12mysql_selectP3THDP10TABLE_LISTjR4ListI4ItemEPS4_jP8st_orderS9_S7_S9_yP13select_resultP18st_select_lex_unitP13st_select_lex+0x8bc)[0x5589d70aa0ec]
      mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0x137)[0x5589d70aa307]
      mysqld(+0x4caf7e)[0x5589d7045f7e]
      mysqld(_Z21mysql_execute_commandP3THD+0x4dca)[0x5589d705127a]
      mysqld(_Z11mysql_parseP3THDPcjP12Parser_statebb+0x28a)[0x5589d705444a]
      mysqld(_Z16dispatch_command19enum_server_commandP3THDPcjbb+0x1cf3)[0x5589d7056e53]
      mysqld(_Z10do_commandP3THD+0x164)[0x5589d70576f4]
      mysqld(_Z24do_handle_one_connectionP7CONNECT+0x232)[0x5589d7129e72]
      mysqld(handle_one_connection+0x3d)[0x5589d712a00d]
      /lib/x86_64-linux-gnu/libpthread.so.0(+0x8064)[0x7fc9ebd37064]
      /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7fc9ea11962d]
       
      Trying to get some variables.
      Some pointers may be invalid and cause the dump to abort.
      Query (0x7fc97800ef10): SELECT     1 FROM     `test1` a         LEFT JOIN     `test2` b         ON             b.`effdt` = (                 SELECT                     MAX(b.`effdt`)                 FROM                     `test2` b_t                 WHERE                     b_t.`column` = b.`column`             )
      Connection ID (thread ID): 8
      Status: NOT_KILLED
       
      Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on
       
      The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
      information that should help you find out what is causing the crash.
      
      

      docker-maria-10.3.0

      Version: '10.3.0-MariaDB-10.3.0+maria~jessie'  socket: '/var/run/mysqld/mysqld.sock'  port: 3306  mariadb.org binary distribution
      170626 22:21:44 [ERROR] mysqld got signal 11 ;
      This could be because you hit a bug. It is also possible that this binary
      or one of the libraries it was linked against is corrupt, improperly built,
      or misconfigured. This error can also be caused by malfunctioning hardware.
       
      To report this bug, see https://mariadb.com/kb/en/reporting-bugs
       
      We will try our best to scrape up some info that will hopefully help
      diagnose the problem, but since we have already crashed, 
      something is definitely wrong and this may fail.
       
      Server version: 10.3.0-MariaDB-10.3.0+maria~jessie
      key_buffer_size=134217728
      read_buffer_size=2097152
      max_used_connections=1
      max_threads=102
      thread_count=7
      It is possible that mysqld could use up to 
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 759906 K  bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.
       
      Thread pointer: 0x7f7c040009a8
      Attempting backtrace. You can use the following information to find out
      where mysqld died. If you see no messages after this, something went
      terribly wrong...
      stack_bottom = 0x7f7c78188e38 thread_stack 0x49000
      mysqld(my_print_stacktrace+0x2e)[0x557336b8818e]
      mysqld(handle_fatal_signal+0x305)[0x5573365b6405]
      /lib/x86_64-linux-gnu/libpthread.so.0(+0xf890)[0x7f7c8210a890]
      mysqld(_ZN14Item_subselect30enumerate_field_refs_processorEPv+0x28)[0x55733665c5d8]
      mysqld(_ZN20Dep_analysis_context27setup_equality_modules_depsEP4ListI10Dep_moduleE+0x13b)[0x55733650209b]
      mysqld(+0x61608d)[0x55733650308d]
      mysqld(+0x6161bf)[0x5573365031bf]
      mysqld(+0x54c07b)[0x55733643907b]
      mysqld(_ZN4JOIN14optimize_innerEv+0xa25)[0x557336440865]
      mysqld(_ZN4JOIN8optimizeEv+0x33)[0x557336442e13]
      mysqld(_Z12mysql_selectP3THDP10TABLE_LISTjR4ListI4ItemEPS4_jP8st_orderS9_S7_S9_yP13select_resultP18st_select_lex_unitP13st_select_lex+0x8bc)[0x55733644555c]
      mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0x139)[0x557336445779]
      mysqld(+0x4f30ee)[0x5573363e00ee]
      mysqld(_Z21mysql_execute_commandP3THD+0x6276)[0x5573363ecf96]
      mysqld(_Z11mysql_parseP3THDPcjP12Parser_statebb+0x351)[0x5573363f0481]
      mysqld(_Z16dispatch_command19enum_server_commandP3THDPcjbb+0x2708)[0x5573363f3a48]
      mysqld(_Z10do_commandP3THD+0x160)[0x5573363f4330]
      mysqld(_Z24do_handle_one_connectionP7CONNECT+0x232)[0x5573364c6602]
      mysqld(handle_one_connection+0x3d)[0x5573364c679d]
      /lib/x86_64-linux-gnu/libpthread.so.0(+0x8064)[0x7f7c82103064]
      /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7f7c804e562d]
       
      Trying to get some variables.
      Some pointers may be invalid and cause the dump to abort.
      Query (0x7f7c0400f0e0): SELECT     1 FROM     `test1` a         LEFT JOIN     `test2` b         ON             b.`effdt` = (                 SELECT                     MAX(b.`effdt`)                 FROM                     `test2` b_t                 WHERE                     b_t.`column` = b.`column`             )
      Connection ID (thread ID): 8
      Status: NOT_KILLED
       
      Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on
       
      The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
      information that should help you find out what is causing the crash.
      
      

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              serg Sergei Golubchik
              ericpp Eric P
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