src/schema/schema_project.c:266:21: runtime error: applying zero offset to null pointer
    #0 0x7f45c757a5eb in __wt_schema_project_slice /home/ubuntu/wiredtiger/src/schema/schema_project.c:266:21
    #1 0x7f45c6fe4b04 in __curtable_set_valuev /home/ubuntu/wiredtiger/src/cursor/cur_table.c:265:15
    #2 0x7f45c6fe1718 in __wt_curtable_set_value /home/ubuntu/wiredtiger/src/cursor/cur_table.c:318:5
    #3 0x7f45c84a2d13 in __wt_cursor__set_value /home/ubuntu/wt.c/lang/python/wiredtiger_wrap.c:3118:3
    #4 0x7f45c84a2d13 in _wrap_Cursor__set_value /home/ubuntu/wt.c/lang/python/wiredtiger_wrap.c:4605:5


src/cursor/cur_table.c:735:22: runtime error: member access within null pointer of type 'WT_CURSOR_TABLE' (aka 'struct __wt_cursor_table')
    #0 0x7f45c6fe838f in __wt_table_range_truncate /home/ubuntu/wiredtiger/src/cursor/cur_table.c:735:22
    #1 0x7f45c759325f in __wt_schema_range_truncate /home/ubuntu/wt.c/src/schema/schema_truncate.c:174:15
    #2 0x7f45c75add88 in __wt_session_range_truncate /home/ubuntu/wt.c/src/session/session_api.c:1434:5
    #3 0x7f45c7602338 in __session_truncate /home/ubuntu/wt.c/src/session/session_api.c:1502:9
    #4 0x7f45c84aceea in _wrap_Session_truncate /home/ubuntu/wt.c/lang/python/wiredtiger_wrap.c:6514:16