possible nil dereference in `(*conn).QueryContext`

[streamer45]

We've received a report of a panic on version v1.10.9 (Golang go1.21.8)

runtime.errorString: runtime error: invalid memory address or nil pointer dereference
  File "github.com/lib/pq@v1.10.9/conn_go18.go", line 31, in (*conn).QueryContext
  File "database/sql/ctxutil.go", line 48, in ctxDriverQuery
  File "database/sql/sql.go", line 1748, in (*DB).queryDC.func1
  File "database/sql/sql.go", line 3502, in withLock
  File "database/sql/sql.go", line 1743, in (*DB).queryDC
  File "database/sql/sql.go", line 1726, in (*DB).query
  File "database/sql/sql.go", line 1704, in (*DB).QueryContext.func1
  File "database/sql/sql.go", line 1538, in (*DB).retry
  File "database/sql/sql.go", line 1703, in (*DB).QueryContext
  File "github.com/jmoiron/sqlx@v1.3.5/sqlx_context.go", line 171, in (*DB).QueryRowxContext
  File "github.com/jmoiron/sqlx@v1.3.5/sqlx_context.go", line 82, in GetContext
  File "github.com/jmoiron/sqlx@v1.3.5/sqlx_context.go", line 147, in (*DB).GetContext