Timeout doesn't work when https server not responding

$ rvm use system
$ ruby --version
ruby 1.8.7 (2011-06-30 patchlevel 352) [x86_64-linux]

$ ruby server.rb &
[1] 5924
Listening on port 8043

$ time curl -m 3 -k https://localhost:8043
"GET / HTTP/1.1\r\n"
curl: (28) Operation timed out after 3001 milliseconds with 0 bytes received

real	0m3.011s
user	0m0.008s
sys	0m0.012s

$ time ruby client.rb
"POST /foo HTTP/1.1\r\n"
/usr/lib/ruby/1.8/timeout.rb:64:in `rbuf_fill': execution expired (Timeout::Error)
	from /usr/lib/ruby/1.8/net/protocol.rb:134:in `rbuf_fill'
	from /usr/lib/ruby/1.8/net/protocol.rb:116:in `readuntil'
	from /usr/lib/ruby/1.8/net/protocol.rb:126:in `readline'
	from /usr/lib/ruby/1.8/net/http.rb:2028:in `read_status_line'
	from /usr/lib/ruby/1.8/net/http.rb:2017:in `read_new'
	from /usr/lib/ruby/1.8/net/http.rb:1051:in `request'
	from client.rb:38
	from /usr/lib/ruby/1.8/net/http.rb:543:in `start'
	from client.rb:38
	from /usr/lib/ruby/1.8/timeout.rb:67:in `timeout'
	from /usr/lib/ruby/1.8/timeout.rb:101:in `timeout'
	from client.rb:37

real	0m2.075s
user	0m0.056s
sys	0m0.012s

$ rvm use jruby
$ ruby --version
jruby 1.6.7 (ruby-1.8.7-p357) (2012-02-22 3e82bc8) (OpenJDK 64-Bit Server VM 1.6.0_23) [linux-amd64-java]
$ gem list
*** LOCAL GEMS ***
bouncy-castle-java (1.5.0146.1)
bundler (1.0.22)
jruby-openssl (0.7.6.1)
rake (0.8.7)

$ time ruby client.rb
"POST /foo HTTP/1.1\r\n"
^C
real	0m24.111s
user	0m5.460s
sys	0m0.140s