The following bug has been logged on the website:
Bug reference: 6525
Logged by: KOIZUMI Satoru
Email address: koizumistr(at)minos(dot)ocn(dot)ne(dot)jp
PostgreSQL version: 9.1.3
Operating system: Mac OS X
Description:
In Table 55-4. HeapTupleHeaderData Layout, the type of t_infomask2 is
"int16". But in src/include/access/htup.h, it is "uint16". Maybe the
document is wrong.