dgit import: Defend against broken symlinks in ..

Provide a special error message if lstat succeeds but lstat fails.

This is not hypothetical - currently even dgit import ../blah.dsc can
generate this situation !

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

1 files changed, 4 insertions, 1 deletions

diff --git a/dgit b/dgit
index 5197596..a68bf19 100755
--- a/dgit
+++ b/dgit
@@ -6349,7 +6349,10 @@ END
     foreach my $fi (@dfi) {
 	my $f = $fi->{Filename};
 	my $here = "../$f";
-	next if lstat $here;
+	if (lstat $here) {
+	    next if stat $here;
+	    fail "lstat $here works but stat gives $! !";
+	}
 	fail "stat $here: $!" unless $! == ENOENT;
 	my $there = $dscfn;
 	if ($dscfn =~ m#^(?:\./+)?\.\./+#) {