merge revision(s) 2c93c554019ebdc394d3c51c6d925620d3005f84,f5ea43a2e61789357e9c4b374b4bc6756abeae17: [Backport #19360]

	Ensure main file has default coverage if required. (#7169)

	* Extract common code for coverage setup.
	---
	 iseq.c | 13 +++++++++++--
	 1 file changed, 11 insertions(+), 2 deletions(-)

	More coverage tests & specs. (#7171)

	* Add spec for eval and line coverage.

	* Add test for main file coverage.
	---
	 spec/ruby/library/coverage/start_spec.rb | 8 +++++++-
	 test/coverage/autostart.rb               | 2 ++
	 test/coverage/main.rb                    | 1 +
	 test/coverage/test_coverage.rb           | 7 +++++++
	 4 files changed, 17 insertions(+), 1 deletion(-)
	 create mode 100644 test/coverage/autostart.rb
	 create mode 100644 test/coverage/main.rb

1 files changed, 7 insertions, 1 deletions

diff --git a/spec/ruby/library/coverage/start_spec.rb b/spec/ruby/library/coverage/start_spec.rb
index ddfad8b47c..a993abbf4e 100644
--- a/spec/ruby/library/coverage/start_spec.rb
+++ b/spec/ruby/library/coverage/start_spec.rb
@@ -2,5 +2,11 @@ require_relative '../../spec_helper'
 require 'coverage'
 
 describe 'Coverage.start' do
-  it 'needs to be reviewed for spec completeness'
+  ruby_version_is '3.2' do
+    it "can measure coverage within eval" do
+      Coverage.start(lines: true, eval: true)
+      eval("Object.new\n"*3, binding, "test.rb", 1)
+      Coverage.result["test.rb"].should == {lines: [1, 1, 1]}
+    end
+  end
 end