repl: print errors with causes

CHANGELOG.md

@@ -6,6 +6,7 @@
 - "full message view" not needed because of footers that go to contact status #4151
 - Pick up system's light/dark mode in generated message HTML #4150
 - Support non-persistent configuration with DELTACHAT_* env
+- Print deltachat-repl errors with causes. #4166
 
 ### Fixes
 - Fix segmentation fault if `dc_context_unref()` is called during

deltachat-repl/src/main.rs

@@ -359,7 +359,7 @@ async fn start(args: Vec<String>) -> Result<(), Error> {
                                 false
                             }
                             Err(err) => {
-                                println!("Error: {err}");
+                                println!("Error: {err:#}");
                                 true
                             }
                         }
@@ -374,7 +374,7 @@ async fn start(args: Vec<String>) -> Result<(), Error> {
                     break;
                 }
                 Err(err) => {
-                    println!("Error: {err}");
+                    println!("Error: {err:#}");
                     break;
                 }
             }