Fix issue #41

features/rspec_fails_on_initialization.feature

@@ -0,0 +1,14 @@
+@rspec
+Feature:
+
+  Running specs with a failing rspec setup
+
+  Scenario: Fail if rspec fails before starting its tests
+    Given a file named "spec/spec_helper.rb" with:
+      """
+      require 'simplecov'
+      SimpleCov.start
+      raise "some exception in the class loading before the tests start"
+      """
+    When I run `bundle exec rspec spec`
+    Then the exit status should not be 0

lib/simplecov/defaults.rb

@@ -36,10 +36,14 @@
   # Exclude files outside of SimpleCov.root
   load_adapter 'root_filter'
 end
-
 at_exit do
   # Store the exit status of the test run since it goes away after calling the at_exit proc...
-  @exit_status = $!.status if $!.is_a?(SystemExit)
+  if $! #was an exception thrown?
+    #if it was a SystemExit, use the accompanying status
+    #otherwise set a non-zero status representing termination by some other exception
+    #(see github issue 41)
+    @exit_status = $!.is_a?(SystemExit) ? $!.status : 1
+  end
   SimpleCov.at_exit.call
   exit @exit_status if @exit_status # Force exit with stored status (see github issue #5)
 end