From 618a9973e95481a01ea2258f0f8a88c059e260f3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Leosvel=20P=C3=A9rez=20Espinosa?=
 <leosvel.perez.espinosa@gmail.com>
Date: Wed, 11 Mar 2026 13:59:51 +0100
Subject: [PATCH] fix(core): prevent TUI crash when task output arrives after
 completion

---
 .../nx/src/tasks-runner/life-cycles/tui-summary-life-cycle.ts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/packages/nx/src/tasks-runner/life-cycles/tui-summary-life-cycle.ts b/packages/nx/src/tasks-runner/life-cycles/tui-summary-life-cycle.ts
index f099f6f6d33..0b12008b9a8 100644
--- a/packages/nx/src/tasks-runner/life-cycles/tui-summary-life-cycle.ts
+++ b/packages/nx/src/tasks-runner/life-cycles/tui-summary-life-cycle.ts
@@ -74,6 +74,10 @@ export function getTuiTerminalSummaryLifeCycle({
   };
 
   lifeCycle.appendTaskOutput = (taskId, output) => {
+    // Task already completed and output was finalized by endTasks — discard late-arriving data
+    if (!taskOutputChunks[taskId]) {
+      return;
+    }
     taskOutputChunks[taskId].push(output);
   };