Portage version comparison is not working

[tomerse-sg]

What happened:
I think I've found a bug in portage compare function.
the bug happens in this part -

	r1 := big.NewInt(0)
	if match1[9] != "" {
		r1.SetString(match1[9], 10)
	}
	r2 := big.NewInt(0)
	if match2[9] != "" {
		r1.SetString(match2[9], 10)
	}

The r1.SetString(match2[9], 10) in the 2nd time should be r2.SetString(match2[9], 10)

What you expected to happen:
the 1.2.3-r2 should be higher than 1.2.3-r1
How to reproduce it (as minimally and precisely as possible):
run the below code

	res := comparePortageVersions("1.2.3-r1", "1.2.3-r2")
	print(res)

Anything else we need to know?:

Environment:

• Output of grype version: latest
• OS (e.g: cat /etc/os-release or similar): macOS

[kzantow]

@tomerse-sg this looks to be a problem, quite likely exactly as you've described -- are you able to add a PR for this?

[tomerse-sg]

@kzantow please see the pr