fix(interpreter): check errexit_suppressed in execute_script_body

set -e incorrectly exited when a for/while/until loop body ended with
an AND-OR chain (e.g. [[ test ]] && cmd) that returned non-zero.

Check result.errexit_suppressed in execute_script_body to suppress
errexit for compound commands whose non-zero exit came from && or ||.

Closes #873

Author: chaliy

crates/bashkit/src/interpreter/mod.rs

@@ -1142,7 +1142,8 @@ impl Interpreter {
             // Run ERR trap on non-zero exit (unless in conditional chain)
             if exit_code != 0 {
                 let suppressed = matches!(command, Command::List(_))
-                    || matches!(command, Command::Pipeline(p) if p.negated);
+                    || matches!(command, Command::Pipeline(p) if p.negated)
+                    || result.errexit_suppressed;
                 if !suppressed {
                     self.run_err_trap(&mut stdout, &mut stderr).await;
                 }
@@ -1151,9 +1152,11 @@ impl Interpreter {
             // errexit (set -e): stop on non-zero exit for top-level simple commands.
             // List commands handle errexit internally (with && / || chain awareness).
             // Negated pipelines (! cmd) explicitly handle the exit code.
+            // Compound commands propagate errexit_suppressed from inner AND-OR chains.
             if self.is_errexit_enabled() && exit_code != 0 {
                 let suppressed = matches!(command, Command::List(_))
-                    || matches!(command, Command::Pipeline(p) if p.negated);
+                    || matches!(command, Command::Pipeline(p) if p.negated)
+                    || result.errexit_suppressed;
                 if !suppressed {
                     break;
                 }

crates/bashkit/tests/set_e_and_or_tests.rs

@@ -191,6 +191,30 @@ echo "SHOULD NOT APPEAR"
     assert!(!result.stdout.contains("SHOULD NOT APPEAR"));
 }
 
+/// set -e: && chain failure at end of for loop body should NOT exit (issue #873)
+#[tokio::test]
+async fn set_e_and_chain_at_end_of_for_body() {
+    let mut bash = Bash::new();
+    let result = bash
+        .exec(
+            r#"
+set -euo pipefail
+result=""
+for src in yes no; do
+  [[ "${src}" == "yes" ]] && result="${src}"
+done
+echo "result: ${result}"
+"#,
+        )
+        .await
+        .unwrap();
+    assert!(
+        result.stdout.contains("result: yes"),
+        "should print 'result: yes' but got: {:?}",
+        result.stdout
+    );
+}
+
 /// set -e should still exit on non-AND-OR failures
 #[tokio::test]
 async fn set_e_exits_on_plain_failure() {