diff -Nru os-autoinst-4.5.1527308405.8b586d5/debian/changelog os-autoinst-4.5.1527308405.8b586d5/debian/changelog
--- os-autoinst-4.5.1527308405.8b586d5/debian/changelog	2019-01-06 06:22:32.000000000 +0000
+++ os-autoinst-4.5.1527308405.8b586d5/debian/changelog	2019-02-25 19:01:55.000000000 +0000
@@ -1,3 +1,10 @@
+os-autoinst (4.5.1527308405.8b586d5-4.1) unstable; urgency=medium
+
+  * Non-maintainer upload
+  * Add patch to avoid race condition in osutils::runcmd (Cloese: #921757)
+
+ -- Hilko Bengen <bengen@debian.org>  Mon, 25 Feb 2019 20:01:55 +0100
+
 os-autoinst (4.5.1527308405.8b586d5-4) unstable; urgency=medium
 
   * debian/control
diff -Nru os-autoinst-4.5.1527308405.8b586d5/debian/patches/0006-Eliminate-race-condition-in-runcmd.patch os-autoinst-4.5.1527308405.8b586d5/debian/patches/0006-Eliminate-race-condition-in-runcmd.patch
--- os-autoinst-4.5.1527308405.8b586d5/debian/patches/0006-Eliminate-race-condition-in-runcmd.patch	1970-01-01 00:00:00.000000000 +0000
+++ os-autoinst-4.5.1527308405.8b586d5/debian/patches/0006-Eliminate-race-condition-in-runcmd.patch	2019-02-25 19:01:55.000000000 +0000
@@ -0,0 +1,45 @@
+From: Hilko Bengen <bengen@debian.org>
+Date: Mon, 25 Feb 2019 09:47:35 +0100
+Subject: Eliminate race condition in runcmd
+
+---
+ osutils.pm | 16 ++++++----------
+ 1 file changed, 6 insertions(+), 10 deletions(-)
+
+diff --git a/osutils.pm b/osutils.pm
+index b06a042..05423c3 100644
+--- a/osutils.pm
++++ b/osutils.pm
+@@ -93,19 +93,10 @@ sub quote {
+ # Open a process to run external program and check its return status
+ sub runcmd {
+     diag "running " . join(' ', @_);
+-    my ($pid, $status);
+-
+-    local $SIG{CHLD} = sub {
+-        local ($!, $?);
+-        while ((my $child = waitpid(-1, WNOHANG)) > 0) {
+-            diag "runcmd pid $pid returned $child";
+-            $status = $?;
+-        }
+-    };
+ 
+     my ($wtr, $rdr, $err);
+     $err = gensym;
+-    $pid = open3($wtr, $rdr, $err, @_);
++    my $pid = open3($wtr, $rdr, $err, @_);
+     die "couldn't open: $!" unless defined $pid;
+     close($wtr) or die "couldn't close fh: $!";
+ 
+@@ -125,6 +116,11 @@ sub runcmd {
+     close($rdr) or die "couldn't close fh: $!";
+     close($err) or die "couldn't close fh: $!";
+ 
++    my $status;
++    waitpid $pid, 0;
++    $status = $?;
++    diag "runcmd pid $pid returned $status";
++
+     my $exit_code = $status >> 8;
+     die "runcmd failed with exit code $exit_code" unless ($exit_code == 0);
+     return $exit_code;
diff -Nru os-autoinst-4.5.1527308405.8b586d5/debian/patches/0007-Do-not-syntax-check-module-files-that-start-with-a-d.patch os-autoinst-4.5.1527308405.8b586d5/debian/patches/0007-Do-not-syntax-check-module-files-that-start-with-a-d.patch
--- os-autoinst-4.5.1527308405.8b586d5/debian/patches/0007-Do-not-syntax-check-module-files-that-start-with-a-d.patch	1970-01-01 00:00:00.000000000 +0000
+++ os-autoinst-4.5.1527308405.8b586d5/debian/patches/0007-Do-not-syntax-check-module-files-that-start-with-a-d.patch	2019-02-25 19:01:55.000000000 +0000
@@ -0,0 +1,28 @@
+From: Hilko Bengen <bengen@debian.org>
+Date: Mon, 25 Feb 2019 20:21:55 +0100
+Subject: Do not syntax-check module files that start with a dot (such as .pc)
+
+---
+ t/00-compile-check-all.t | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/t/00-compile-check-all.t b/t/00-compile-check-all.t
+index 41896f7..f344853 100755
+--- a/t/00-compile-check-all.t
++++ b/t/00-compile-check-all.t
+@@ -36,6 +36,7 @@ my $test = Test::Compile->new();
+ my @files = $test->all_pm_files(".");
+ 
+ for my $file (@files) {
++    next if ($file =~ /^[.]/);
+     next if ($file =~ /main.pm/);
+     $file =~ s,^\./,,;
+     $test->ok($test->pm_file_compiles($file), "Compile test for $file");
+@@ -43,6 +44,7 @@ for my $file (@files) {
+ 
+ @files = ('isotovideo', $test->all_pl_files("."));
+ for my $file (@files) {
++    next if ($file =~ /^[.]/);
+     $test->ok($test->pl_file_compiles($file), "Compile test for $file");
+ }
+ $test->done_testing();
diff -Nru os-autoinst-4.5.1527308405.8b586d5/debian/patches/series os-autoinst-4.5.1527308405.8b586d5/debian/patches/series
--- os-autoinst-4.5.1527308405.8b586d5/debian/patches/series	2019-01-06 06:22:32.000000000 +0000
+++ os-autoinst-4.5.1527308405.8b586d5/debian/patches/series	2019-02-25 19:01:55.000000000 +0000
@@ -3,3 +3,5 @@
 0003-adjust-to-avoid-ocr-test-failure.patch
 0004-avoid-make-check-doc-failure.patch
 0005-set-perl-path.patch
+0006-Eliminate-race-condition-in-runcmd.patch
+0007-Do-not-syntax-check-module-files-that-start-with-a-d.patch