0.48.3

The Sentry Rust SDK now reports data discarded by the SDK to Sentry’s Stats page. The SDK reports approximate counts for drops from transports, queues, rate-limit backoff, sampling, event processors, and before_send* callbacks, including span counts for dropped transactions and byte counts for dropped logs and metrics.

New Features

• Added EnvelopeFilter and EnvelopeFilterCallbacks, which let callers observe envelope items removed by Envelope::filter, including attachments removed after their event or transaction is filtered out. Existing Envelope::filter closure callers continue to work, although some closures may require an explicit item type annotation (#1182).
• Added the LossSource trait, which provides the client report data categories and quantities to report when supported Sentry data is dropped (#1170).
• Added TransportFactory::create_transport_with_options, which constructs transports from TransportOptions instead of full ClientOptions (#1142).
• Added transport-specific options types and with_options constructors for built-in HTTP transports, including ReqwestHttpTransportOptions, CurlHttpTransportOptions, UreqHttpTransportOptions, and EmbeddedSVCHttpTransportOptions (#1142).
• Added transport worker options types and deprecated the legacy constructors for built-in background transport workers, including StdTransportThreadOptions and TokioTransportThreadOptions (#1142).
• Added client report protocol types in sentry-types, including ClientReport, client_report::Item, client_report::Category, and client_report::Reason, plus support for serializing client_report envelope items (#1144).
• Added a client report Recorder type, which modern TransportFactory implementations receive via TransportOptions. Transports can use this recorder to record discarded Sentry data; the SDK aggregates these reported losses and automatically sends them in a future envelope (#1158).

Deprecations

• Deprecated Hub::with. Use Hub::current instead (#1126).

Fixes

• Fixed ureq transport handling for HTTP error statuses so 429 rate limits and 413 payload-too-large responses are processed correctly (#1177).

Behavior Changes

• Custom transport factories that implement TransportFactory::create_transport now receive ClientOptions reconstructed from TransportOptions. The reconstructed options include only transport-relevant fields, such as DSN, user agent, proxy settings, and TLS certificate validation settings. This may affect code that reads non-transport fields in create_transport, but the API remains source-compatible and this change is included in a minor/patch release (#1142).