Run tests under panic=abort (#749)

.github/workflows/ci.yml

@@ -89,6 +89,16 @@ jobs:
       - name: Test
         run: ci/test-stable.sh test
 
+  panic-abort:
+    name: panic=abort tests
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install Rust
+        run: rustup update $nightly && rustup default $nightly
+      - name: Run tests with -Cpanic=abort
+        run: ci/panic-abort.sh
+
   # Run tests on some extra platforms
   cross:
     name: cross

ci/panic-abort.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+set -ex
+RUSTFLAGS="$RUSTFLAGS -Cpanic=abort -Zpanic-abort-tests" cargo test --all-features --test '*'

tests/test_bytes.rs

@@ -291,6 +291,7 @@ fn split_to_uninitialized() {
 }
 
 #[test]
+#[cfg_attr(not(panic = "unwind"), ignore)]
 fn split_off_to_at_gt_len() {
     fn make_bytes() -> Bytes {
         let mut bytes = BytesMut::with_capacity(100);
@@ -1618,6 +1619,7 @@ fn owned_to_vec() {
 }
 
 #[test]
+#[cfg_attr(not(panic = "unwind"), ignore)]
 fn owned_safe_drop_on_as_ref_panic() {
     let buf: [u8; 10] = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
     let drop_counter = SharedAtomicCounter::new();

tests/test_bytes_vec_alloc.rs

@@ -7,7 +7,7 @@ use bytes::{Buf, Bytes};
 #[global_allocator]
 static LEDGER: Ledger = Ledger::new();
 
-const LEDGER_LENGTH: usize = 2048;
+const LEDGER_LENGTH: usize = 1024 * 1024;
 
 struct Ledger {
     alloc_table: [(AtomicPtr<u8>, AtomicUsize); LEDGER_LENGTH],
@@ -31,9 +31,11 @@ impl Ledger {
                 .is_ok()
             {
                 entry_size.store(size, Ordering::SeqCst);
-                break;
+                return;
             }
         }
+
+        panic!("Ledger ran out of space.");
     }
 
     fn remove(&self, ptr: *mut u8) -> usize {