fix(ext/process): suppress child process kill errors in onAbort handler (#29193)

Co-authored-by: Divy Srivastava <dj.srivastava23@gmail.com>

ext/process/40_process.js

@@ -299,9 +299,14 @@ class ChildProcess {
       this.#stderr = readableStreamForRidUnrefable(stderrRid);
     }
 
-    const onAbort = () => this.kill("SIGTERM");
+    const onAbort = () => {
+      try {
+        this.kill("SIGTERM");
+      } catch {
+        // Ignore the error for https://github.com/denoland/deno/issues/27112
+      }
+    };
     signal?.[abortSignal.add](onAbort);
-
     const waitPromise = op_spawn_wait(this.#rid);
     this.#waitPromise = waitPromise;
     this.#status = PromisePrototypeThen(waitPromise, (res) => {

tests/unit/command_test.ts

@@ -1093,3 +1093,21 @@ Deno.test(
     assertEquals(child.success, true);
   },
 );
+
+Deno.test(
+  { ignore: Deno.build.os === "windows" },
+  async function abortChildProcessRightWhenItExitsShouldNotThrow() {
+    const controller = new AbortController();
+    const cb = () => controller.abort();
+    Deno.addSignalListener("SIGCHLD", cb);
+    const output = await new Deno.Command("true", { signal: controller.signal })
+      .output();
+    assertEquals(output.success, true);
+    assertEquals(output.code, 0);
+    assertEquals(output.signal, null);
+    assertEquals(output.stdout, new Uint8Array());
+    assertEquals(output.stderr, new Uint8Array());
+
+    Deno.removeSignalListener("SIGCHLD", cb);
+  },
+);