Ensure execution result timing is populated

In the case where RSpec does not handle an error (e.g. SystemExit), we
still want to capture the example timing data to not break profiling
information that may get generated via `--profile`.

Fixes #2142

Author: soulcutter

lib/rspec/core/example.rb

@@ -260,6 +260,7 @@ def run(example_group_instance, reporter)
 
         finish(reporter)
       ensure
+        execution_result.ensure_timing_set(clock)
         RSpec.current_example = nil
       end
 
@@ -565,13 +566,23 @@ def example_skipped?
         # @api private
         # Records the finished status of the example.
         def record_finished(status, finished_at)
-          self.status      = status
-          self.finished_at = finished_at
-          self.run_time    = (finished_at - started_at).to_f
+          self.status = status
+          calculate_run_time(finished_at)
+        end
+
+        # @api private
+        # Populates finished_at and run_time if it has not yet been set
+        def ensure_timing_set(clock)
+          calculate_run_time(clock.now) unless finished_at
         end
 
       private
 
+        def calculate_run_time(finished_at)
+          self.finished_at = finished_at
+          self.run_time    = (finished_at - started_at).to_f
+        end
+
         # For backwards compatibility we present `status` as a string
         # when presenting the legacy hash interface.
         def hash_for_delegation

spec/rspec/core/example_spec.rb

@@ -58,6 +58,21 @@ def metadata_hash(*args)
     end
   end
 
+  it "captures example timing even for exceptions unhandled by RSpec" do
+    rescued = false
+    unhandled = RSpec::Support::AllExceptionsExceptOnesWeMustNotRescue::AVOID_RESCUING.first
+    example = example_group.example { raise unhandled }
+
+    begin
+      example_group.run
+    rescue unhandled
+      # can't use raise_error matcher since RSpec won't rescue unhandled
+      rescued = true
+    end
+    expect(example.execution_result.finished_at).not_to be_nil
+    expect(rescued).to be_truthy
+  end
+
   describe "#exception" do
     it "supplies the exception raised, if there is one" do
       example = example_group.example { raise "first" }