From f4bb4a22d4a6cdd1cdfa996c51ed477ef1a29e59 Mon Sep 17 00:00:00 2001
From: Daniel Imms <daimms@microsoft.com>
Date: Sat, 8 Sep 2018 13:01:59 -0700
Subject: [PATCH] Fallback on default color when linkifier can't find the
 character

This probably doesn't fix the underlying problem, but it will make it
obvious by using the white background color and more easily help identify
the problem case.

Fixes #1669
---
 src/Linkifier.ts | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/Linkifier.ts b/src/Linkifier.ts
index 8615daf8e7..6080c4aeac 100644
--- a/src/Linkifier.ts
+++ b/src/Linkifier.ts
@@ -220,8 +220,11 @@ export class Linkifier extends EventEmitter implements ILinkifier {
     // Get cell color
     const line = this._terminal.buffer.lines.get(this._terminal.buffer.ydisp + rowIndex);
     const char = line.get(index);
-    const attr: number = char[CHAR_DATA_ATTR_INDEX];
-    const fg = (attr >> 9) & 0x1ff;
+    let fg: number | undefined;
+    if (char) {
+      const attr: number = char[CHAR_DATA_ATTR_INDEX];
+      fg = (attr >> 9) & 0x1ff;
+    }
 
     // Ensure the link is valid before registering
     if (matcher.validationCallback) {