libdpkg: Make run_error_handler cope with NULL econtext gracefully

This could happen if the context has not been initialized, or if it has
been unwinded more than necessary.

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/dpkg/ehandle.c b/lib/dpkg/ehandle.c
index 09b1a770c..093e6f61a 100644
--- a/lib/dpkg/ehandle.c
+++ b/lib/dpkg/ehandle.c
@@ -97,6 +97,12 @@ run_error_handler(void)
     fprintf(stderr, _("%s: unrecoverable fatal error, aborting:\n %s\n"),
             thisname, errmsg);
     exit(2);
+  }
+
+  if (econtext == NULL) {
+    fprintf(stderr, _("%s: outside error context, aborting:\n %s\n"),
+            thisname, errmsg);
+    exit(2);
   } else {
     longjmp(*econtext->jump, 1);
   }