Merge pull request #704 from Mark-Simulacrum/fix-ci

Switch to beta for CI tests

Author: Mark-Simulacrum

.github/workflows/ci.yml

@@ -41,10 +41,10 @@ jobs:
         with:
           fetch-depth: 1
 
-      - name: Install latest nightly
+      - name: Install latest beta
         uses: actions-rs/toolchain@v1
         with:
-          toolchain: nightly
+          toolchain: beta
           override: true
 
       - name: Configure environment
@@ -69,10 +69,10 @@ jobs:
         with:
           fetch-depth: 1
 
-      - name: Install latest nightly
+      - name: Install latest beta
         uses: actions-rs/toolchain@v1
         with:
-          toolchain: nightly
+          toolchain: beta
           override: true
 
       - name: Configure environment

collector/src/main.rs

@@ -413,7 +413,7 @@ fn main() {
     match main_result() {
         Ok(code) => process::exit(code),
         Err(err) => {
-            eprintln!("collector error: {:#}\n{}", err, err.backtrace());
+            eprintln!("collector error: {:?}", err);
             process::exit(1);
         }
     }