fix(otel): Copy active span on scope clone

CHANGELOG.md

@@ -24,6 +24,7 @@
 - Fix log count in client reports ([#4869](https://github.com/getsentry/sentry-java/pull/4869))
 - Fix profilerId propagation ([#4833](https://github.com/getsentry/sentry-java/pull/4833))
 - Fix profiling init for Spring and Spring Boot w Agent auto-init ([#4815](https://github.com/getsentry/sentry-java/pull/4815))
+- Copy active span on scope clone ([#4878](https://github.com/getsentry/sentry-java/pull/4878))
 
 ### Improvements
 

sentry/src/main/java/io/sentry/Scope.java

@@ -124,6 +124,7 @@ public Scope(final @NotNull SentryOptions options) {
   private Scope(final @NotNull Scope scope) {
     this.transaction = scope.transaction;
     this.transactionName = scope.transactionName;
+    this.activeSpan = scope.activeSpan;
     this.session = scope.session;
     this.options = scope.options;
     this.level = scope.level;

sentry/src/test/java/io/sentry/ScopeTest.kt

@@ -12,6 +12,7 @@ import kotlin.test.assertFalse
 import kotlin.test.assertNotNull
 import kotlin.test.assertNotSame
 import kotlin.test.assertNull
+import kotlin.test.assertSame
 import kotlin.test.assertTrue
 import org.junit.Assert.assertArrayEquals
 import org.mockito.kotlin.any
@@ -155,6 +156,21 @@ class ScopeTest {
     assertEquals(attachment.contentType, actual.contentType)
   }
 
+  @Test
+  fun `copying scope copies active span`() {
+    val scope = Scope(SentryOptions())
+
+    val transaction =
+      SentryTracer(TransactionContext("transaction-name", "op"), NoOpScopes.getInstance())
+    val span = transaction.startChild("child1")
+
+    scope.setActiveSpan(span)
+
+    val clone = scope.clone()
+
+    assertSame(span, clone.span)
+  }
+
   @Test
   fun `copying scope and changing the original values wont change the clone values`() {
     val scope = Scope(SentryOptions())