BUG #7834: Overflow with limited information provided

The following bug has been logged on the website:

Bug reference: 7834
Logged by: Jackie Zhang
Email address: jackie(dot)qq(dot)zhang(at)gmail(dot)com
PostgreSQL version: 9.2.1
Operating system: Linux
Description:

Hi, PostgreSQL,

I bumped into the error situation which only has the following error log
message available:

"FATAL: requested shared memory size overflows size_t"

I tuned down all the memory related options and the system got back
normally. But I really don't know which one caused the problem.

The log message provides quite limited information for users like me to fix
the problem (it's different from typical PostgreSQL's log messages which are
usually super good).

I wonder whether it's possible to print information like "what is the
limited", "which configuration option is overflowed", etc. These infomation
is of great help to users like me to fix the problem.

Thank you very much!
Jackie