From: Martin Kletzander <mkletzan(a)redhat.com&gt; MinGW complained that we might be dereferencing a NULL pointer. While that can't be true, the logic certainly allows for that. ../../src/conf/domain_conf.c: In function 'virDomainDefPostParse': ../../src/conf/domain_conf.c:4224:18: error: potential null pointer dereference [-Werror=null-dereference] if (!vcpu->online && vcpu->cpumask) { ~~~~^~~~~~~~ Signed-off-by: Daniel P. Berrange <berrange(a)redhat.com&gt; --- Pushed as build fix src/conf/domain_conf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index db1a0ff..1fd826d 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -4221,7 +4221,7 @@ virDomainDefRemoveOfflineVcpuPin(virDomainDefPtr def) for (i = 0; i < virDomainDefGetVcpusMax(def); i++) { vcpu = virDomainDefGetVcpu(def, i); - if (!vcpu->online && vcpu->cpumask) { + if (vcpu && !vcpu->online && vcpu->cpumask) { virBitmapFree(vcpu->cpumask); vcpu->cpumask = NULL; -- 2.7.4