fix: Skip UI crumbs when target or sender is nil

CHANGELOG.md

@@ -7,6 +7,10 @@
 - Replay for crashes (#4171)
 - Redact web view from replay (#4203)
 
+### Fixes
+
+- Skip UI crumbs when target or sender is nil (#4211)
+
 ## 8.32.0
 
 ### Features

Sources/Sentry/SentryBreadcrumbTracker.m

@@ -179,6 +179,10 @@ - (void)addEnabledCrumb
 #if SENTRY_HAS_UIKIT
 + (BOOL)avoidSender:(id)sender forTarget:(id)target action:(NSString *)action
 {
+    if (sender == nil || target == nil) {
+        return YES;
+    }
+
     if ([sender isKindOfClass:UITextField.self]) {
         // This is required to avoid creating breadcrumbs for every key pressed in a text field.
         // Textfield may invoke many types of event, in order to check if is a

Tests/SentryTests/Integrations/Breadcrumbs/SentryBreadcrumbTrackerTests.swift

@@ -184,6 +184,21 @@ class SentryBreadcrumbTrackerTests: XCTestCase {
         XCTAssertEqual(eventPayload?["category"] as? String, "app.background")
     }
 
+    func testSkipCrumbs_WhenSenderOrTargetIsNil() throws {
+        let swizzlingWrapper = TestSentrySwizzleWrapper()
+        SentryDependencyContainer.sharedInstance().swizzleWrapper = swizzlingWrapper
+
+        let tracker = SentryBreadcrumbTracker()
+        tracker.start(with: delegate)
+        tracker.startSwizzle()
+
+        swizzlingWrapper.execute(action: "methodPressed:", target: nil, sender: self, event: nil)
+        swizzlingWrapper.execute(action: "methodPressed:", target: self, sender: nil, event: nil)
+
+        // The tracker adds 1 enabled crumb when being started
+        XCTAssertEqual(1, delegate.addCrumbInvocations.invocations.count)
+    }
+
     func testTouchBreadcrumbForSessionReplay() throws {
         let scope = Scope()
         let client = TestClient(options: Options())