Disassembler: Fix for external declaration generation

Fixes a problem where an incorrect pathname could be generated
for an external declaration if the original reference to the object
includes leading carats.

1 files changed, 7 insertions, 1 deletions

diff --git a/source/common/dmextern.c b/source/common/dmextern.c
index 8256b65f7..d0396fb5a 100644
--- a/source/common/dmextern.c
+++ b/source/common/dmextern.c
@@ -227,8 +227,14 @@ AcpiDmNormalizeParentPrefix (
     ACPI_SIZE               Length;
 
 
-    /* Search upwards in the parse tree until we reach a namespace node */
+    if (!Op)
+    {
+        return (NULL);
+    }
+
+    /* Search upwards in the parse tree until we reach the next namespace node */
 
+    Op = Op->Common.Parent;
     while (Op)
     {
         if (Op->Common.Node)