JRuby Rails Console hanging on "Switch to inspect mode"

Question

Within Git Bash on Windows, jruby -S rails console hangs after printing the following:

Loading development environment (Rails 4.2.8)
Switch to inspect mode.

When I ctrl+c to exit, I get the following error stack:

Errno::EBADF: Bad file descriptor - channel: org.jruby.util.io.ChannelFD@1eda12b3
gets at org/jruby/RubyIO.java:2233
gets at C:/jruby-9.1.12.0/lib/ruby/stdlib/irb/input-method.rb:61
block in eval_input at C:/jruby-9.1.12.0/lib/ruby/stdlib/irb.rb:469
...

What is "inspect mode", and how does one switch to it? Why doesn't rails console work in Git Bash when it does work in Command Prompt?