The RFC2047 unquoting, used to parse email addresses in From and Cc
headers, is broken in several ways:

* It erroneously substitutes ' ' for '_' in *the whole* header, even
  outside the quoted field. [Noticed by Christoph.]

* It is too liberal in its matching, and happily matches the start of
  one quoted chunk against the end of another, or even just something
  that looks like such an end. [Noticed by Junio.]

* It fundamentally cannot cope with encodings that are not a superset
  of ASCII, nor several (incompatible) encodings in the same header.

This patch fixes the first two by doing a more careful decoding of the
=AB outer quoting.  Fixing the fundamental issues is left for a
future, more intrusive, patch.

Noticed-by: Christoph Miebach <christoph.mieb...@web.de>
Helped-by: Junio C Hamano <gits...@pobox.com>
Signed-off-by: Thomas Rast <tr...@student.ethz.ch>
---

This is the easy part, fixed as per Junio's comment that it needs to
use a .*? match for the contents, and with a test.

 git-send-email.perl   | 10 ++++++----
 t/t9001-send-email.sh | 13 +++++++++++++
 2 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/git-send-email.perl b/git-send-email.perl
index ef30c55..6647137 100755
--- a/git-send-email.perl
+++ b/git-send-email.perl
@@ -862,11 +862,13 @@ sub make_message_id {
 sub unquote_rfc2047 {
        local ($_) = @_;
        my $encoding;
-       if (s/=\?([^?]+)\?q\?(.*)\?=/$2/g) {
+       s{=\?([^?]+)\?q\?(.*?)\?=}{
                $encoding = $1;
-               s/_/ /g;
-               s/=([0-9A-F]{2})/chr(hex($1))/eg;
-       }
+               my $e = $2;
+               $e =~ s/_/ /g;
+               $e =~ s/=([0-9A-F]{2})/chr(hex($1))/eg;
+               $e;
+       }eg;
        return wantarray ? ($_, $encoding) : $_;
 }
 
diff --git a/t/t9001-send-email.sh b/t/t9001-send-email.sh
index 8c12c65..0351228 100755
--- a/t/t9001-send-email.sh
+++ b/t/t9001-send-email.sh
@@ -841,6 +841,19 @@ test_expect_success $PREREQ '--compose adds MIME for utf8 
subject' '
        grep "^Subject: =?UTF-8?q?utf8-s=C3=BCbj=C3=ABct?=" msgtxt1
 '
 
+test_expect_success $PREREQ 'utf8 author is correctly passed on' '
+       clean_fake_sendmail &&
+       test_commit weird_author &&
+       test_when_finished "git reset --hard HEAD^" &&
+       git commit --amend --author "Füñný Nâmé <odd_?=m...@example.com>" &&
+       git format-patch --stdout -1 >funny_name.patch &&
+       git send-email --from="Example <nob...@example.com>" \
+         --to=nob...@example.com \
+         --smtp-server="$(pwd)/fake.sendmail" \
+         funny_name.patch &&
+       grep "^From: Füñný Nâmé <odd_?=m...@example.com>" msgtxt1
+'
+
 test_expect_success $PREREQ 'detects ambiguous reference/file conflict' '
        echo master > master &&
        git add master &&
-- 
1.7.12.rc0.434.gd809d0f

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