Date: Sun, 12 Jul 2020 11:19:23 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 247930] sed pattern space deleted upon leading insertion Message-ID: <bug-247930-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D247930 Bug ID: 247930 Summary: sed pattern space deleted upon leading insertion Product: Base System Version: 12.1-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: bin Assignee: bugs@FreeBSD.org Reporter: lhoursquentin@gmail.com When adding leading text with `s/^/some text/`, if the pattern space contai= ns multiple lines with the first one being empty then the pattern space remain= ing lines are deleted (case 2 below). One line reproducer: ``` sh$ echo content | sed 'H; g; s/^/preceding/' preceding sh$ ``` More complete examples: 1 - Non empty first line case ``` s/.*/1st line\ 2nd line\ 3rd line/ l i \ ----- s/^/some preceding text / l ``` ``` sh$ echo | sed -nf non-empty-first-line.sed 1st line$ 2nd line$ 3rd line$ ----- some preceding text 1st line$ 2nd line$ 3rd line$ ``` 2 - Empty first line case (the actual bug) ``` s/.*/\ 2nd line\ 3rd line/ l i \ ----- s/^/some preceding text / l ``` ``` sh$ echo | sed -nf empty-first-line.sed $ 2nd line$ 3rd line$ ----- some preceding text $ $ ``` 3 - Empty first line case workaround ``` s/.*/\ 2nd line\ 3rd line/ l i \ ----- s/.*/some preceding text &/ l ``` ``` sh$ echo | sed -nf empty-first-line-workaround.sed $ 2nd line$ 3rd line$ ----- some preceding text $ 2nd line$ 3rd line$ ``` --=20 You are receiving this mail because: You are the assignee for the bug.=
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