Bug #531: libpq: Operations following PQfinish() work.

Anthony Chavez (anthony(at)xmission(dot)com) reports a bug with a severity of 4
The lower the number the more severe it is.

Short Description
libpq: Operations following PQfinish() work.

Long Description
The PGconn *conn argument to PQfinish() is not set to NULL. As a result, calling libpq functions---in particular, PQexec()---after PQfinish() has been called, continue to work until the following segmentation fault occurs:

Program received signal SIGSEGV, Segmentation fault.
0x4044dec7 in resetPQExpBuffer () from /usr/lib/libpq.so.2

This can be misleading, and it may be wise to set conn = NULL before PQfinish() returns.

Environment: PostgreSQL 7.1.3 / RedHat Linux 7.1.

Sample Code

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