Doesn't it already do that?

'GET' implies very old version of LWP

http://cpansearch.perl.org/src/GAAS/libwww-perl-6.05/lib/LWP/Protocol/http.pm 

warn "Content-Length header value was wrong, fixed";
warn "Content-Length set when there is no content, fixed";

[download]

In reply to Re: Should LWP warn about wrong Content-Length? (it does) by Anonymous Monk
in thread Should LWP warn about wrong Content-Length? by vsespb

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