Fixing nil crashes

.vscode/settings.json

@@ -133,7 +133,8 @@
         "random": "cpp",
         "thread": "cpp",
         "variant": "cpp",
-        "any": "cpp"
+        "any": "cpp",
+        "future": "cpp"
     },
     // Configure paths or glob patterns to exclude from file watching.
     "files.watcherExclude": {

src/darwin/Framework/CHIP/MTRBaseDevice.mm

@@ -14,8 +14,7 @@
  *    See the License for the specific language governing permissions and
  *    limitations under the License.
  */
-#import <Matter/MTRClusterConstants.h>
-#import <Matter/MTRDefines.h>
+#import <Matter/Matter.h>
 
 #import "MTRAttributeTLVValueDecoder_Internal.h"
 #import "MTRBaseDevice_Internal.h"
@@ -31,31 +30,32 @@
 #import "MTRLogging_Internal.h"
 #import "MTRMetricKeys.h"
 #import "MTRSetupPayload_Internal.h"
+#import "MTRUtilities.h"
 #import "NSDataSpanConversion.h"
 #import "NSStringSpanConversion.h"
 #import "zap-generated/MTRCommandPayloads_Internal.h"
 
-#include "app/ConcreteAttributePath.h"
-#include "app/ConcreteCommandPath.h"
-#include "app/ConcreteEventPath.h"
-#include "app/StatusResponse.h"
-#include "lib/core/CHIPError.h"
-#include "lib/core/DataModelTypes.h"
-
-#include <app/AttributePathParams.h>
-#include <app/BufferedReadCallback.h>
-#include <app/ClusterStateCache.h>
-#include <app/InteractionModelEngine.h>
-#include <app/ReadClient.h>
-#include <app/data-model/List.h>
-#include <controller/CommissioningWindowOpener.h>
-#include <controller/ReadInteraction.h>
-#include <controller/WriteInteraction.h>
-#include <crypto/CHIPCryptoPAL.h>
-#include <setup_payload/SetupPayload.h>
-#include <system/SystemClock.h>
-
-#include <memory>
+#import "app/ConcreteAttributePath.h"
+#import "app/ConcreteCommandPath.h"
+#import "app/ConcreteEventPath.h"
+#import "app/StatusResponse.h"
+#import "lib/core/CHIPError.h"
+#import "lib/core/DataModelTypes.h"
+
+#import <app/AttributePathParams.h>
+#import <app/BufferedReadCallback.h>
+#import <app/ClusterStateCache.h>
+#import <app/InteractionModelEngine.h>
+#import <app/ReadClient.h>
+#import <app/data-model/List.h>
+#import <controller/CommissioningWindowOpener.h>
+#import <controller/ReadInteraction.h>
+#import <controller/WriteInteraction.h>
+#import <crypto/CHIPCryptoPAL.h>
+#import <setup_payload/SetupPayload.h>
+#import <system/SystemClock.h>
+
+#import <memory>
 
 using namespace chip;
 using namespace chip::app;
@@ -2290,8 +2290,9 @@ + (MTRAttributeRequestPath *)requestPathWithEndpointID:(NSNumber * _Nullable)end
 
 - (BOOL)isEqualToAttributeRequestPath:(MTRAttributeRequestPath *)path
 {
-    return [_endpoint isEqualToNumber:path.endpoint] && [_cluster isEqualToNumber:path.cluster] &&
-        [_attribute isEqualToNumber:path.attribute];
+    return MTREqualObjects(_endpoint, path.endpoint)
+        && MTREqualObjects(_cluster, path.cluster)
+        && MTREqualObjects(_attribute, path.attribute);
 }
 
 - (BOOL)isEqual:(id)object
@@ -2362,8 +2363,9 @@ + (MTREventRequestPath *)requestPathWithEndpointID:(NSNumber * _Nullable)endpoin
 
 - (BOOL)isEqualToEventRequestPath:(MTREventRequestPath *)path
 {
-    return
-        [_endpoint isEqualToNumber:path.endpoint] && [_cluster isEqualToNumber:path.cluster] && [_event isEqualToNumber:path.event];
+    return MTREqualObjects(_endpoint, path.endpoint)
+        && MTREqualObjects(_cluster, path.cluster)
+        && MTREqualObjects(_event, path.event);
 }
 
 - (BOOL)isEqual:(id)object
@@ -2432,7 +2434,8 @@ ConcreteClusterPath path(static_cast<chip::EndpointId>([endpointID unsignedShort
 
 - (BOOL)isEqualToClusterPath:(MTRClusterPath *)clusterPath
 {
-    return [_endpoint isEqualToNumber:clusterPath.endpoint] && [_cluster isEqualToNumber:clusterPath.cluster];
+    return MTREqualObjects(_endpoint, clusterPath.endpoint)
+        && MTREqualObjects(_cluster, clusterPath.cluster);
 }
 
 - (BOOL)isEqual:(id)object
@@ -2520,7 +2523,7 @@ ConcreteDataAttributePath path(static_cast<chip::EndpointId>([endpointID unsigne
 
 - (BOOL)isEqualToAttributePath:(MTRAttributePath *)attributePath
 {
-    return [self isEqualToClusterPath:attributePath] && [_attribute isEqualToNumber:attributePath.attribute];
+    return [self isEqualToClusterPath:attributePath] && MTREqualObjects(_attribute, attributePath.attribute);
 }
 
 - (BOOL)isEqual:(id)object
@@ -2613,7 +2616,7 @@ ConcreteEventPath path(static_cast<chip::EndpointId>([endpointID unsignedShortVa
 
 - (BOOL)isEqualToEventPath:(MTREventPath *)eventPath
 {
-    return [self isEqualToClusterPath:eventPath] && [_event isEqualToNumber:eventPath.event];
+    return [self isEqualToClusterPath:eventPath] && MTREqualObjects(_event, eventPath.event);
 }
 
 - (BOOL)isEqual:(id)object
@@ -2703,7 +2706,7 @@ ConcreteCommandPath path(static_cast<chip::EndpointId>([endpointID unsignedShort
 
 - (BOOL)isEqualToCommandPath:(MTRCommandPath *)commandPath
 {
-    return [self isEqualToClusterPath:commandPath] && [_command isEqualToNumber:commandPath.command];
+    return [self isEqualToClusterPath:commandPath] && MTREqualObjects(_command, commandPath.command);
 }
 
 - (BOOL)isEqual:(id)object

src/darwin/Framework/CHIP/MTRDevice.mm

@@ -15,7 +15,7 @@
  *    limitations under the License.
  */
 
-#import <Matter/MTRDefines.h>
+#import <Matter/Matter.h>
 #import <os/lock.h>
 
 #import "MTRAsyncWorkQueue.h"
@@ -39,19 +39,20 @@
 #import "MTRMetricsCollector.h"
 #import "MTRTimeUtils.h"
 #import "MTRUnfairLock.h"
+#import "MTRUtilities.h"
 #import "zap-generated/MTRCommandPayloads_Internal.h"
 
-#include "lib/core/CHIPError.h"
-#include "lib/core/DataModelTypes.h"
-#include <app/ConcreteAttributePath.h>
-#include <lib/support/FibonacciUtils.h>
+#import "lib/core/CHIPError.h"
+#import "lib/core/DataModelTypes.h"
+#import <app/ConcreteAttributePath.h>
+#import <lib/support/FibonacciUtils.h>
 
-#include <app/AttributePathParams.h>
-#include <app/BufferedReadCallback.h>
-#include <app/ClusterStateCache.h>
-#include <app/InteractionModelEngine.h>
-#include <platform/LockTracker.h>
-#include <platform/PlatformManager.h>
+#import <app/AttributePathParams.h>
+#import <app/BufferedReadCallback.h>
+#import <app/ClusterStateCache.h>
+#import <app/InteractionModelEngine.h>
+#import <platform/LockTracker.h>
+#import <platform/PlatformManager.h>
 
 typedef void (^MTRDeviceAttributeReportHandler)(NSArray * _Nonnull);
 
@@ -336,7 +337,8 @@ - (id)copyWithZone:(NSZone *)zone
 
 - (BOOL)isEqualToClusterData:(MTRDeviceClusterData *)otherClusterData
 {
-    return [_dataVersion isEqual:otherClusterData.dataVersion] && [_attributes isEqual:otherClusterData.attributes];
+    return MTREqualObjects(_dataVersion, otherClusterData.dataVersion)
+        && MTREqualObjects(_attributes, otherClusterData.attributes);
 }
 
 - (BOOL)isEqual:(id)object

src/darwin/Framework/CHIP/MTRUtilities.mm

@@ -19,5 +19,16 @@
 
 BOOL MTREqualObjects(id<NSObject> _Nullable a, id<NSObject> _Nullable b)
 {
-    return (a == nil) ? (b == nil) : [a isEqual:b];
+    // Check if A is nil, and return based on B being nil (or not)
+    if (a == nil) {
+        return b == nil;
+    }
+
+    // If B is nil at this point, we're not equal
+    if (b == nil) {
+        return NO;
+    }
+
+    // Otherwise work on equality, given that we're both non nil
+    return [a isEqual:b];
 }

src/darwin/Framework/Matter.xcodeproj/project.pbxproj

@@ -1626,6 +1626,7 @@
 				B2E0D7B2245B0B5C003C5B48 /* MTRManualSetupPayloadParser.h in Headers */,
 				3CF134A7289D8ADA0017A19E /* MTRCSRInfo.h in Headers */,
 				88E07D612B9A89A4005FD53E /* MTRMetricKeys.h in Headers */,
+				3D4733B32BE2D1DA003DC19B /* MTRUtilities.h in Headers */,
 				B2E0D7B1245B0B5C003C5B48 /* Matter.h in Headers */,
 				7596A84428762729004DAE0E /* MTRDevice.h in Headers */,
 				B2E0D7B8245B0B5C003C5B48 /* MTRSetupPayload.h in Headers */,
@@ -1671,7 +1672,6 @@
 				514C7A022B64223400DD6D7B /* MTRServerEndpoint_Internal.h in Headers */,
 				511913FC28C100EF009235E9 /* MTRBaseSubscriptionCallback.h in Headers */,
 				51565CB12A7AD77600469F18 /* MTRDeviceControllerDataStore.h in Headers */,
-				3D4733B32BE2D1DA003DC19B /* MTRUtilities.h in Headers */,
 				3D843713294977000070D20A /* NSDataSpanConversion.h in Headers */,
 				991DC08B247704DC00C13860 /* MTRLogging_Internal.h in Headers */,
 				51FE723F2ACDEF3E00437032 /* MTRCommandPayloadExtensions_Internal.h in Headers */,