Crash in 64 bit ODBC driver when using bookmarks

Dear Sir or Madam,

I think I have found a bug in the PostgreSQL ODBC driver (of which I am using the latest version 10_03).
I am using SQLBindCol to bind a bookmark column of type SQL_C_VARBOOKMARK.

Everything works perfectly when I compile my application in 32 bit mode and use the 32 bit ODBC driver.
With the 64 bit driver I get an instant crash (memory exception).
With logging turned on, the last entry in the mylog is the following:
[SC_Create_bookmark]3133: entering type=-2 buflen=64 buf=000000000C6AF268

I can also attach a debugger and the crash happens at the following line:
                memcpy(CALC_BOOKMARK_ADDR(bookmark, offset, bind_size, bind_row), &pg_bm, cvtlen);

At that time the value of the bookmark variable is: bookmark = 0x0000000000000001 {buflen=??? buffer=??? used=??? ...}, screenshot attached.
Although it received good values when the function was called (as seen in the log), the memory got corrupted in between and it is no longer a valid pointer.
I assume this is because something is writing a 64 bit value into a buffer which is only made for a 32 bit integer.

Can you please fix the crash in the next version of the ODBC driver?

Regards,

Christof PAAL

NATO Communications and Information Agency
Service Support and Business Applications | Senior System Manager
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