[adapters] Box backtrace inside ControllerError::StorageError.

blp · blp · commit c1506bf559f2 · 2025-10-13T23:02:04.000Z
This should clear up errors like this:

```
error: the `Err`-variant returned from this function is very large
   --&gt; crates/iceberg/src/input.rs:204:33
    |
204 |     fn snapshot_descr(&amp;self) -&gt; Result&lt;SnapshotDescr, ControllerError&gt; {
    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the `Err`-variant is at least 128 bytes
```

Signed-off-by: Ben Pfaff &lt;blp@feldera.com&gt;
diff --git a/crates/adapterlib/src/errors/controller.rs b/crates/adapterlib/src/errors/controller.rs
@@ -698,7 +698,7 @@ pub enum ControllerError {
         /// Describes the context where the error occurred.
         context: String,
         error: StorageError,
-        backtrace: Backtrace,
+        backtrace: Box<Backtrace>,
     },
 
     /// Enterprise-only feature.
@@ -1401,7 +1401,7 @@ impl ControllerError {
         Self::StorageError {
             context: context.into(),
             error,
-            backtrace: Backtrace::capture(),
+            backtrace: Box::new(Backtrace::capture()),
         }
     }
 
