Check for null before trying to use ApplicationContext

Fixes gh-145

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/AutoConfigurationReportLoggingInitializer.java

@@ -87,6 +87,10 @@ public class AutoConfigurationReportLoggingInitializer implements
 
 	public void logAutoConfigurationReport(boolean isCrashReport) {
 		if (this.report == null) {
+			if (this.applicationContext == null) {
+				this.logger.info("Nothing to report: ApplicationContext not available");
+				return;
+			}
 			this.report = AutoConfigurationReport.get(this.applicationContext
 					.getBeanFactory());
 		}

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/AutoConfigurationReportLoggingInitializerTests.java

@@ -162,6 +162,13 @@ public class AutoConfigurationReportLoggingInitializerTests {
 		assertNotNull(context.getBean(AutoConfigurationReport.class));
 	}
 
+	@Test
+	public void noErrorIfNotInitialized() throws Exception {
+		this.initializer.handleError(null, null, new String[0], new RuntimeException(
+				"Planned"));
+		assertThat(this.infoLog.get(0), containsString("Nothing to report"));
+	}
+
 	public static class MockLogFactory extends LogFactoryImpl {
 		@Override
 		public Log getInstance(String name) throws LogConfigurationException {