[vbox-dev] [PATCH] VBoxManage snapshot restorecurrent segfault

[Daniel Wyatt]

For machines that do not have any snapshots, these commands will currently
cause a crash in VBoxManage:

VBoxManage snapshot "machine_with_no_snapshots" restorecurrent
VBoxManage snapshot "machine_with_no_snapshots" edit --current --name
'new_name'

See the attached patch for a fix.
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Index: VBoxManageSnapshot.cpp
===================================================================
--- VBoxManageSnapshot.cpp	(revision 58256)
+++ VBoxManageSnapshot.cpp	(working copy)
@@ -501,6 +501,11 @@
             if (fRestoreCurrent)
             {
                 CHECK_ERROR_BREAK(sessionMachine, COMGETTER(CurrentSnapshot)(pSnapshot.asOutParam()));
+                if (pSnapshot.isNull())
+                {
+                    RTPrintf("This machine does not have any snapshots\n");
+                    return RTEXITCODE_FAILURE;
+                }
             }
             else
             {
@@ -541,6 +546,11 @@
                 || !strcmp(a->argv[2], "-current"))
             {
                 CHECK_ERROR_BREAK(sessionMachine, COMGETTER(CurrentSnapshot)(pSnapshot.asOutParam()));
+                if (pSnapshot.isNull())
+                {
+                    RTPrintf("This machine does not have any snapshots\n");
+                    return RTEXITCODE_FAILURE;
+                }
             }
             else
             {