fix undefined behavior in messagebus unit tests

also avoids hanging/leaving processes after running all unit tests
with UBSAN without recovery.

1 files changed, 3 insertions, 1 deletions

diff --git a/vespalib/src/vespa/vespalib/data/slime/basic_value.cpp b/vespalib/src/vespa/vespalib/data/slime/basic_value.cpp
index 46525c4e6bd..9c805ccf565 100644
--- a/vespalib/src/vespa/vespalib/data/slime/basic_value.cpp
+++ b/vespalib/src/vespa/vespalib/data/slime/basic_value.cpp
@@ -11,7 +11,9 @@ Memory
 store(Memory m, Stash & stash)
 {
     char * buf = stash.alloc(m.size);
-    memcpy(buf, m.data, m.size);
+    if (m.data) {
+        memcpy(buf, m.data, m.size);
+    }
     return Memory(buf, m.size);
 }