data_dictionary.innodb_trx hitting assert again

[Andrew Hutchings]

drizzle1> start transaction;
drizzle2> select * from data_dictionary.innodb_trx;
*bang*

This time it is crashing obtaining data rather than generating the table.

#0 0x0000003b9de34085 in raise () from /lib64/libc.so.6
#1 0x0000003b9de35a36 in abort () from /lib64/libc.so.6
#2 0x0000003b9de2c8c5 in __assert_fail () from /lib64/libc.so.6
#3 0x00000000007942cf in getQueryStringCopy (session=<value optimized out>,
    length=<value optimized out>) at ./drizzled/session.h:434
#4 innobase_get_stmt (session=<value optimized out>,
    length=<value optimized out>) at plugin/innobase/handler/ha_innodb.cc:1310
#5 0x000000000088a039 in fill_trx_row (row=0x7fffc81d8738,
    trx=0x7fffd4006d08, requested_lock_row=<value optimized out>,
    cache=0xd84500) at plugin/innobase/trx/trx0i_s.c:480
#6 0x000000000088afdb in fetch_data_into_cache (cache=0xd84500)
    at plugin/innobase/trx/trx0i_s.c:1274
#7 trx_i_s_possibly_fetch_data_into_cache (cache=0xd84500)
    at plugin/innobase/trx/trx0i_s.c:1304
#8 0x00000000007c0cca in InnodbTrxTool::Generator::Generator (
    this=0x7fffc8102300, arg=<value optimized out>,
    in_table_name=<value optimized out>)
    at plugin/innobase/handler/data_dictionary.cc:757
#9 0x00000000007c8829 in InnodbTrxTool::generator(drizzled::Field**) ()
#10 0x00000000007749f4 in FunctionCursor::doStartTableScan (
    this=0x7fffc81d2190) at plugin/function_engine/cursor.cc:70
#11 0x000000000055bfa8 in drizzled::Cursor::startTableScan (