otter: Do not panic on (most) command execution errors

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/src/bin/otter.rs b/src/bin/otter.rs
index dc531d0f760ec629411dd854b0739a126fdc57c9..75016025c6cd86cfa43d4403c2eb413e32719fb7 100644 (file)
--- a/src/bin/otter.rs
+++ b/src/bin/otter.rs
@@ -435,7 +435,14 @@ fn main() {
                             env::args().next().unwrap(),
                             &subcommand));
 
-  call(sc, mo, subargs).expect("execution error");
+  call(sc, mo, subargs).unwrap_or_else(|e|{
+    eprint!("otter: error");
+    for e in e.chain() {
+      eprint!(": {}", &e);
+    }
+    eprintln!("");
+    exit(12);
+  })
 }
 
 struct Conn {