okay, so yes indeed Avast fails to scan inside the archive (omni.jar) and I can't open it with 7zip ...now the OP's post is still completely over the top. Call Avast a broken AV because it cannot open this particular archive
haven't tried with other *.jar yet.
edit: okay, can't scan other *.jar files either sounds funny but I didn't try so far >>> there's definitely an issue as Avast is using 7zip.
edit: no problem with WinRar of course.
edit: okay just looked into 7-zip (don't tell me I know this wouldn't solve the issue with Avast...
) and there's no jar option, it just doesn't support it. Meaning that Avast might have to switch to something better, and yeah Winrar isn't free nor oss.