dgit: Do not execute END blocks in children.

END blocks run inside children created by fork or piped open (the
latter, if they run perl code), on exit or (I think maybe) die.  This
is far from appropriate.

So far symptoms of this bug seem to be limited to duplicated error
messages but I have not done a thorough analysis.  Closes:#850052.

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

2 files changed, 10 insertions, 2 deletions

diff --git a/debian/changelog b/debian/changelog
index 9f7b5fa..8edf527 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,6 +1,9 @@
 dgit (3.2~) unstable; urgency=medium
 
-  * 
+  Bugfixes:
+  * dgit: Do not execute END blocks in children.  So far symptoms of this
+    bug seem to be limited to duplicated error messages but I have not
+    done a thorough analysis.  Closes:#850052.
 
  --
 
diff --git a/dgit b/dgit
index f7f2b71..afdf2c5 100755
--- a/dgit
+++ b/dgit
@@ -156,6 +156,7 @@ our $split_brain = 0;
 
 END {
     local ($@, $?);
+    return unless forkcheck_mainprocess();
     print STDERR "! $_\n" foreach $supplementary_message =~ m/^.+$/mg;
 }
 
@@ -220,6 +221,7 @@ initdebug('');
 our @end;
 END { 
     local ($?);
+    return unless forkcheck_mainprocess();
     foreach my $f (@end) {
 	eval { $f->(); };
 	print STDERR "$us: cleanup: $@" if length $@;
@@ -4473,7 +4475,10 @@ sub i_cleanup {
     }
 }
 
-END { i_cleanup(); }
+END {
+    return unless forkcheck_mainprocess();
+    i_cleanup();
+}
 
 sub i_method {
     my ($base,$selector,@args) = @_;