The change from `span.iter_headers()` to `span._iter_headers()` can cause an `AttributeError` when `span` is a `NoOpStreamedSpan`. The `_iter_headers` method in `StreamedSpan` accesses `self._segment` (line 505), but `NoOpStreamedSpan` doesn't initialize this attribute since it doesn't call `super().__init__()`. Other methods in this file (get_traceparent, get_baggage, get_trace_context) have guards like `not isinstance(self.span, NoOpStreamedSpan)` but this method is missing that check.

The change from `span.iter_headers()` to `span._iter_headers()` can cause an `AttributeError` when `span` is a `NoOpStreamedSpan`. The `_iter_headers` method in `StreamedSpan` accesses `self._segment` (line 505), but `NoOpStreamedSpan` doesn't initialize this attribute since it doesn't call `super().__init__()`. Other methods in this file (get_traceparent, get_baggage, get_trace_context) have guards like `not isinstance(self.span, NoOpStreamedSpan)` but this method is missing that check.

The `_iter_headers` method (lines 504-512) accesses `self._segment`, but `NoOpStreamedSpan` never initializes this attribute. When `iter_trace_propagation_headers` in `scope.py` calls `span._iter_headers()` without checking for `NoOpStreamedSpan`, it will raise `AttributeError: 'NoOpStreamedSpan' object has no attribute '_segment'`. The guard `if not self._segment` doesn't help because it requires `_segment` to exist. Similarly, `_dynamic_sampling_context`, `_to_baggage`, and `_get_baggage` will fail for the same reason.

The `_iter_headers` method (lines 504-512) accesses `self._segment`, but `NoOpStreamedSpan` never initializes this attribute. When `iter_trace_propagation_headers` in `scope.py` calls `span._iter_headers()` without checking for `NoOpStreamedSpan`, it will raise `AttributeError: 'NoOpStreamedSpan' object has no attribute '_segment'`. The guard `if not self._segment` doesn't help because it requires `_segment` to exist. Similarly, `_dynamic_sampling_context`, `_to_baggage`, and `_get_baggage` will fail for the same reason.

Node.js 20 actions are deprecated. The following actions are running on Node.js 20 and may not work as expected: getsentry/codecov-action@main. Actions will be forced to run with Node.js 24 by default starting June 2nd, 2026. Please check if updated versions of these actions are available that support Node.js 24. To opt into Node.js 24 now, set the FORCE_JAVASCRIPT_ACTIONS_TO_NODE24=true environment variable on the runner or in your workflow file. Once Node.js 24 becomes the default, you can temporarily opt out by setting ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION=true. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

❌ Patch coverage check failed: 25.74% < target 80%

Node.js 20 actions are deprecated. The following actions are running on Node.js 20 and may not work as expected: getsentry/codecov-action@main. Actions will be forced to run with Node.js 24 by default starting June 2nd, 2026. Please check if updated versions of these actions are available that support Node.js 24. To opt into Node.js 24 now, set the FORCE_JAVASCRIPT_ACTIONS_TO_NODE24=true environment variable on the runner or in your workflow file. Once Node.js 24 becomes the default, you can temporarily opt out by setting ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION=true. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

❌ Patch coverage check failed: 25.00% < target 80%

Failed to upload coverage artifact: Failed to CreateArtifact: Received non-retryable error: Failed request: (409) Conflict: an artifact with this name already exists on the workflow run

Failed to upload test artifact: Failed to CreateArtifact: Received non-retryable error: Failed request: (409) Conflict: an artifact with this name already exists on the workflow run

Node.js 20 actions are deprecated. The following actions are running on Node.js 20 and may not work as expected: getsentry/codecov-action@main. Actions will be forced to run with Node.js 24 by default starting June 2nd, 2026. Please check if updated versions of these actions are available that support Node.js 24. To opt into Node.js 24 now, set the FORCE_JAVASCRIPT_ACTIONS_TO_NODE24=true environment variable on the runner or in your workflow file. Once Node.js 24 becomes the default, you can temporarily opt out by setting ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION=true. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

❌ Patch coverage check failed: 25.74% < target 80%

Failed to upload coverage artifact: Failed to CreateArtifact: Received non-retryable error: Failed request: (409) Conflict: an artifact with this name already exists on the workflow run

Failed to upload test artifact: Failed to CreateArtifact: Received non-retryable error: Failed request: (409) Conflict: an artifact with this name already exists on the workflow run

Node.js 20 actions are deprecated. The following actions are running on Node.js 20 and may not work as expected: getsentry/codecov-action@main. Actions will be forced to run with Node.js 24 by default starting June 2nd, 2026. Please check if updated versions of these actions are available that support Node.js 24. To opt into Node.js 24 now, set the FORCE_JAVASCRIPT_ACTIONS_TO_NODE24=true environment variable on the runner or in your workflow file. Once Node.js 24 becomes the default, you can temporarily opt out by setting ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION=true. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

❌ Patch coverage check failed: 25.74% < target 80%

Failed to upload coverage artifact: Failed to CreateArtifact: Received non-retryable error: Failed request: (409) Conflict: an artifact with this name already exists on the workflow run

Failed to upload test artifact: Failed to CreateArtifact: Received non-retryable error: Failed request: (409) Conflict: an artifact with this name already exists on the workflow run

Node.js 20 actions are deprecated. The following actions are running on Node.js 20 and may not work as expected: getsentry/codecov-action@main. Actions will be forced to run with Node.js 24 by default starting June 2nd, 2026. Please check if updated versions of these actions are available that support Node.js 24. To opt into Node.js 24 now, set the FORCE_JAVASCRIPT_ACTIONS_TO_NODE24=true environment variable on the runner or in your workflow file. Once Node.js 24 becomes the default, you can temporarily opt out by setting ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION=true. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

❌ Patch coverage check failed: 25.74% < target 80%

Failed to upload coverage artifact: Failed to CreateArtifact: Received non-retryable error: Failed request: (409) Conflict: an artifact with this name already exists on the workflow run

Failed to upload test artifact: Failed to CreateArtifact: Received non-retryable error: Failed request: (409) Conflict: an artifact with this name already exists on the workflow run

Node.js 20 actions are deprecated. The following actions are running on Node.js 20 and may not work as expected: getsentry/codecov-action@main. Actions will be forced to run with Node.js 24 by default starting June 2nd, 2026. Please check if updated versions of these actions are available that support Node.js 24. To opt into Node.js 24 now, set the FORCE_JAVASCRIPT_ACTIONS_TO_NODE24=true environment variable on the runner or in your workflow file. Once Node.js 24 becomes the default, you can temporarily opt out by setting ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION=true. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

❌ Patch coverage check failed: 25.74% < target 80%

Failed to upload coverage artifact: Failed to CreateArtifact: Received non-retryable error: Failed request: (409) Conflict: an artifact with this name already exists on the workflow run

Failed to upload test artifact: Failed to CreateArtifact: Received non-retryable error: Failed request: (409) Conflict: an artifact with this name already exists on the workflow run

Node.js 20 actions are deprecated. The following actions are running on Node.js 20 and may not work as expected: getsentry/codecov-action@main. Actions will be forced to run with Node.js 24 by default starting June 2nd, 2026. Please check if updated versions of these actions are available that support Node.js 24. To opt into Node.js 24 now, set the FORCE_JAVASCRIPT_ACTIONS_TO_NODE24=true environment variable on the runner or in your workflow file. Once Node.js 24 becomes the default, you can temporarily opt out by setting ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION=true. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

❌ Patch coverage check failed: 25.74% < target 80%

Failed to upload coverage artifact: Failed to CreateArtifact: Received non-retryable error: Failed request: (409) Conflict: an artifact with this name already exists on the workflow run

Failed to upload test artifact: Failed to CreateArtifact: Received non-retryable error: Failed request: (409) Conflict: an artifact with this name already exists on the workflow run

Node.js 20 actions are deprecated. The following actions are running on Node.js 20 and may not work as expected: getsentry/codecov-action@main. Actions will be forced to run with Node.js 24 by default starting June 2nd, 2026. Please check if updated versions of these actions are available that support Node.js 24. To opt into Node.js 24 now, set the FORCE_JAVASCRIPT_ACTIONS_TO_NODE24=true environment variable on the runner or in your workflow file. Once Node.js 24 becomes the default, you can temporarily opt out by setting ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION=true. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

❌ Patch coverage check failed: 24.26% < target 80%

Failed to upload coverage artifact: Failed to CreateArtifact: Received non-retryable error: Failed request: (409) Conflict: an artifact with this name already exists on the workflow run

Failed to upload test artifact: Failed to CreateArtifact: Received non-retryable error: Failed request: (409) Conflict: an artifact with this name already exists on the workflow run

Node.js 20 actions are deprecated. The following actions are running on Node.js 20 and may not work as expected: getsentry/codecov-action@main. Actions will be forced to run with Node.js 24 by default starting June 2nd, 2026. Please check if updated versions of these actions are available that support Node.js 24. To opt into Node.js 24 now, set the FORCE_JAVASCRIPT_ACTIONS_TO_NODE24=true environment variable on the runner or in your workflow file. Once Node.js 24 becomes the default, you can temporarily opt out by setting ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION=true. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

❌ Patch coverage check failed: 25.74% < target 80%

Failed to upload coverage artifact: Failed to CreateArtifact: Received non-retryable error: Failed request: (409) Conflict: an artifact with this name already exists on the workflow run

Failed to upload test artifact: Failed to CreateArtifact: Received non-retryable error: Failed request: (409) Conflict: an artifact with this name already exists on the workflow run

Node.js 20 actions are deprecated. The following actions are running on Node.js 20 and may not work as expected: getsentry/codecov-action@main. Actions will be forced to run with Node.js 24 by default starting June 2nd, 2026. Please check if updated versions of these actions are available that support Node.js 24. To opt into Node.js 24 now, set the FORCE_JAVASCRIPT_ACTIONS_TO_NODE24=true environment variable on the runner or in your workflow file. Once Node.js 24 becomes the default, you can temporarily opt out by setting ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION=true. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

❌ Patch coverage check failed: 25.74% < target 80%

Failed to upload coverage artifact: Failed to CreateArtifact: Received non-retryable error: Failed request: (409) Conflict: an artifact with this name already exists on the workflow run

Failed to upload test artifact: Failed to CreateArtifact: Received non-retryable error: Failed request: (409) Conflict: an artifact with this name already exists on the workflow run

When `self._span` is a `NoOpStreamedSpan`, the code returns early on line 843 before reaching line 857-858 which updates `self._transaction_info["source"]`. In the original code, this update always occurred when a source was provided. This causes inconsistent state where `_transaction` is set but `_transaction_info["source"]` is not updated.