问从IntelliJ IDea运行时，相同路径下的psql和pg_dump在Rakefile中返回不同的版本信息

EN

$ whereis pg_dump
/usr/bin/pg_dump
$ pg_dump -V
pg_dump (PostgreSQL) 9.1.3
$ psql -V
psql (PostgreSQL) 9.1.3
contains support for command-line editing
$ /path/to/home/.rvm/rubies/ruby-1.9.3-p194/bin/ruby -e 'puts "#{`pg_dump -V`}"'
pg_dump (PostgreSQL) 9.1.3
$ /path/to/home/.rvm/rubies/ruby-1.9.3-p194/bin/ruby -e 'puts "#{`psql -V`}"'
psql (PostgreSQL) 9.1.3
contains support for command-line editing

raise "whereis pg_dump = #{`whereis pg_dump`}, pg_dump -V = #{`pg_dump -V`}, psql -V = #{`psql -V`}"

/path/to/home/.rvm/rubies/ruby-1.9.3-p194/bin/ruby -e at_exit{sleep(1)};$stdout.sync=true;$stderr.sync=true;load($0=ARGV.shift) /path/to/home/.rvm/gems/ruby-1.9.3-p194@some_project/gems/ruby-debug-ide-0.4.17.beta14/bin/rdebug-ide --port 51515 -- /path/to/home/.rvm/gems/ruby-1.9.3-p194@global/bin/rake spec
Testing started at 10:59 AM ...
Fast Debugger (ruby-debug-ide 0.4.17.beta14, ruby-debug-base 0.11.30.pre10) listens on 127.0.0.1:51515
rake aborted!
whereis pg_dump = /usr/bin/pg_dump
, pg_dump -V = pg_dump (PostgreSQL) 9.0.5
, psql -V = psql (PostgreSQL) 9.0.5

(See full trace by running task with --trace)

Process finished with exit code 137