From 9c4a3f35183991cb6e8ed4fb1eb2a06892df3d06 Mon Sep 17 00:00:00 2001
From: Mario Zechner <badlogic@Apple-Slayer.local>
Date: Sat, 30 May 2026 01:02:48 +0200
Subject: [PATCH] Fix ANSI wrapping stack overflow

closes #5185
---
 packages/tui/CHANGELOG.md | 4 ++++
 packages/tui/src/utils.ts | 9 +++++++--
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/packages/tui/CHANGELOG.md b/packages/tui/CHANGELOG.md
index c4eb0d08..97a30a79 100644
--- a/packages/tui/CHANGELOG.md
+++ b/packages/tui/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+### Fixed
+
+- Fixed ANSI text wrapping to avoid stack overflows on very long wrapped lines ([#5185](https://github.com/earendil-works/pi/issues/5185)).
+
 ## [0.77.0] - 2026-05-28
 
 ### Fixed
diff --git a/packages/tui/src/utils.ts b/packages/tui/src/utils.ts
index 97f93f65..d613a76d 100644
--- a/packages/tui/src/utils.ts
+++ b/packages/tui/src/utils.ts
@@ -670,7 +670,10 @@ export function wrapTextWithAnsi(text: string, width: number): string[] {
 	for (const inputLine of inputLines) {
 		// Prepend active ANSI codes from previous lines (except for first line)
 		const prefix = result.length > 0 ? tracker.getActiveCodes() : "";
-		result.push(...wrapSingleLine(prefix + inputLine, width));
+		const wrappedLines = wrapSingleLine(prefix + inputLine, width);
+		for (const wrappedLine of wrappedLines) {
+			result.push(wrappedLine);
+		}
 		// Update tracker with codes from this line for next iteration
 		updateTrackerFromText(inputLine, tracker);
 	}
@@ -714,7 +717,9 @@ function wrapSingleLine(line: string, width: number): string[] {
 
 			// Break long token - breakLongWord handles its own resets
 			const broken = breakLongWord(token, width, tracker);
-			wrapped.push(...broken.slice(0, -1));
+			for (let i = 0; i < broken.length - 1; i++) {
+				wrapped.push(broken[i]!);
+			}
 			currentLine = broken[broken.length - 1];
 			currentVisibleLength = visibleWidth(currentLine);
 			continue;