import: cat_blob drops leading 'From ' lines like Inbox

In case people were running old buggy versions from 2016...
(and -convert should probably clean those up, eventually)

1 files changed, 3 insertions, 0 deletions

diff --git a/lib/PublicInbox/Import.pm b/lib/PublicInbox/Import.pm
index c7a96e1e..b25427ee 100644
--- a/lib/PublicInbox/Import.pm
+++ b/lib/PublicInbox/Import.pm
@@ -117,6 +117,9 @@ sub _cat_blob ($$$) {
         $n = read($r, my $lf, 1);
         defined($n) or die "read final byte of cat-blob failed: $!";
         die "bad read on final byte: <$lf>" if $lf ne "\n";
+
+        # fixup some bugginess in old versions:
+        $buf =~ s/\A[\r\n]*From [^\r\n]*\r?\n//s;
         \$buf;
 }