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SubjectRe: [PATCH V2] checkpatch: Improve "return is not a function" test
On Mon, 2013-11-04 at 14:21 -0800, Andrew Morton wrote:
> On Thu, 31 Oct 2013 16:12:44 -0700 Joe Perches <> wrote:
> > This now uses the "$balanced_parens" test and also makes
> > the test depend on perl v5.10 and higher.
> What happens if one uses an older perl version? A mysterious-looking
> splat, I assume?
> It would be nicer to have some explicit perl version test which tells
> user what the problem is, and which perl version is needed?

There is such a test already.
You Signed-off on it.

commit d62a201f24cba74e2fbf9f6f7af86ff5f5e276fc
Author: Dave Hansen <>
Date: Wed Sep 11 14:23:56 2013 -0700

checkpatch: enforce sane perl version

I got a bug report from a couple of users who said was
broken for them. It was erroring out on fairly random lines most commonly
with messages like:

Nested quantifiers in regex; marked by <--HERE in m/(\((?:[^\(\)]++ <-

The bug reporter was running a version of perl 5.8 which was end-of-lifed
in 2008: Versions of perl this old are at
_best_ quite untested. At worst, they are crusty and known to be
completely broken.

If folks have a system _that_ old, then we should have mercy on them and
give them a half-decent error message rather than fail with nutty error

This patch enforces that is run with perl 5.10, which was
end-of-lifed in 2009. The new --ignore-perl-version command-line switch
will let folks override this if they want.

Signed-off-by: Dave Hansen <>
Cc: Joe Perches <>
Cc: Andy Whitcroft <>
Signed-off-by: Andrew Morton <>
Signed-off-by: Linus Torvalds <>

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