Created attachment 7126 [details]
Contains debug info from gdb and backtrace

These two select sql statements will cause the SQL Window to crash as
well:

select 'one' from sometable

select 'two' from sometable

Notice, i did not have semicolons this time.  'sometable' is just some
arbitrary user table.  The actual table I had was very simple: two
varchar columns, and it had two rows of little data in it.

In Gnome-db 0.2.9x, this would execute all the sql statements, but
only the last sql statement's result set would show up in the sql_grid.

oops.  Let me clarify.  

In Gnomedb-fe 0.2.9x, the two queries in a row without a semicolon
would have produced a SQL error.  What I meant to say:

SELECT 'ONE' FROM SOMETABLE;

SELECT 'TWO' FROM SOMETABLE;

This will execute both queries but the only the result set for the
second query will show up in the sql_grid.

Appears to be two problems here:

1. handling of the result from g_strsplit in splitting of SQL Command
strings.  This is in function process_sql_commands of the postgres
provider.

2. error handling - any SQL error will cause a segmentation fault in
the error handling of possibly libgda or the postgres provider

Created attachment 7431 [details] [review]
Solves the problem