From 361f3109a50a7029cf26e10ae283cd809cccb8ed Mon Sep 17 00:00:00 2001
From: Vincent Koc <vincentkoc@ieee.org>
Date: Wed, 11 Mar 2026 09:11:25 -0400
Subject: [PATCH] Terminal: consume unsupported escape bytes in tables

---
 src/terminal/table.test.ts | 14 ++++++++++++++
 src/terminal/table.ts      |  7 +++++++
 2 files changed, 21 insertions(+)

diff --git a/src/terminal/table.test.ts b/src/terminal/table.test.ts
index f6efea976..9c6d53eae 100644
--- a/src/terminal/table.test.ts
+++ b/src/terminal/table.test.ts
@@ -156,6 +156,20 @@ describe("renderTable", () => {
       expect(visibleWidth(line)).toBe(width);
     }
   });
+
+  it("consumes unsupported escape sequences without hanging", () => {
+    const out = renderTable({
+      width: 48,
+      columns: [
+        { key: "K", header: "K", minWidth: 6 },
+        { key: "V", header: "V", minWidth: 12, flex: true },
+      ],
+      rows: [{ K: "row", V: "before \x1b[2J after" }],
+    });
+
+    expect(out).toContain("before");
+    expect(out).toContain("after");
+  });
 });
 
 describe("wrapNoteMessage", () => {
diff --git a/src/terminal/table.ts b/src/terminal/table.ts
index 2945e4701..a1fbb9f57 100644
--- a/src/terminal/table.ts
+++ b/src/terminal/table.ts
@@ -98,6 +98,13 @@ function wrapLine(text: string, width: number): string[] {
     if (nextEsc < 0) {
       nextEsc = text.length;
     }
+    if (nextEsc === i) {
+      // Consume unsupported escape bytes as plain characters so wrapping
+      // cannot stall on unknown ANSI/control sequences.
+      tokens.push({ kind: "char", value: ESC });
+      i += ESC.length;
+      continue;
+    }
     const plainChunk = text.slice(i, nextEsc);
     for (const grapheme of splitGraphemes(plainChunk)) {
       tokens.push({ kind: "char", value: grapheme });