From f2ac3ee88f40e310ad5b360a7e7cb716045d6f1a Mon Sep 17 00:00:00 2001
From: Anthony DePasquale <anthony@depasquale.org>
Date: Sun, 4 Oct 2026 11:29:54 +0200
Subject: [PATCH] sed: discard text queued by a, r and R on Q, as GNU sed does

---
 src/sed/processor.rs      |  2 ++
 tests/by-util/test_sed.rs | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/src/sed/processor.rs b/src/sed/processor.rs
index 298a974e..3b9cf5b3 100644
--- a/src/sed/processor.rs
+++ b/src/sed/processor.rs
@@ -830,6 +830,8 @@ fn process_file(
                     );
                     context.stop_processing = true;
                     context.quiet = true;
+                    // Like GNU sed, discard text queued by `a`, `r` and `R`.
+                    context.append_elements.clear();
                     break;
                 }
                 'R' => {
diff --git a/tests/by-util/test_sed.rs b/tests/by-util/test_sed.rs
index 5597d2fe..573495ab 100644
--- a/tests/by-util/test_sed.rs
+++ b/tests/by-util/test_sed.rs
@@ -3065,6 +3065,38 @@ fn test_quit_no_newline() {
         .stdout_is("foo\n");
 }
 
+/// `Q` discards text queued by `a`, `r` and `R`, as GNU sed does.
+#[test]
+fn test_quit_silently_discards_appended_text() -> std::io::Result<()> {
+    new_ucmd!()
+        .args(&["-e", "a A", "-e", "Q"])
+        .pipe_in("x\n")
+        .succeeds()
+        .stdout_is("");
+
+    let dir = tempfile::tempdir()?;
+    let (one, two, text) = (
+        dir.path().join("1"),
+        dir.path().join("2"),
+        dir.path().join("text"),
+    );
+    fs::write(&one, "a")?;
+    fs::write(&two, "b\n")?;
+    fs::write(&text, "X\n")?;
+    new_ucmd!()
+        .args(&["-e", &format!("R {}", text.display()), "-e", "Q"])
+        .pipe_in("x\n")
+        .succeeds()
+        .stdout_is("");
+    new_ucmd!()
+        .args(&["-e", &format!("2r {}", text.display()), "-e", "2Q"])
+        .arg(&one)
+        .arg(&two)
+        .succeeds()
+        .stdout_is("a");
+    Ok(())
+}
+
 // P with single line no newline input
 #[test]
 fn test_print_first_line_no_newline() {