inbox: ensure we do not show leading "From " lines

Some messages will be misimported due to an old bug,
clean them up and ensure we do not propagate the mistake.

Followup-to: a0c07cba0e5d ("mda: drop leading "From " lines again")

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/PublicInbox/SearchIdx.pm b/lib/PublicInbox/SearchIdx.pm
index 58eccc1a..c2bf9a2d 100644
--- a/lib/PublicInbox/SearchIdx.pm
+++ b/lib/PublicInbox/SearchIdx.pm
@@ -311,6 +311,8 @@ sub do_cat_mail {
         my ($git, $blob, $sizeref) = @_;
         my $mime = eval {
                 my $str = $git->cat_file($blob, $sizeref);
+                # fixup bugs from import:
+                $$str =~ s/\A[\r\n]*From [^\r\n]*\r?\n//s;
                 Email::MIME->new($str);
         };
         $@ ? undef : $mime;