From 88c1b0ffc1432d369f2058634feb9ddf18c46d03 Mon Sep 17 00:00:00 2001
From: Evan Haas <evan@lagerdata.com>
Date: Fri, 12 Apr 2024 14:53:22 -0700
Subject: [PATCH] Source: check for truncated utf-8 codepoint at EOF

---
 src/aro/Source.zig | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/aro/Source.zig b/src/aro/Source.zig
index 06e58ecb..af72e6d8 100644
--- a/src/aro/Source.zig
+++ b/src/aro/Source.zig
@@ -75,6 +75,10 @@ pub fn lineCol(source: Source, loc: Location) LineCol {
             i += 1;
             continue;
         };
+        const slice = source.buf[i..];
+        if (len > slice.len) {
+            break;
+        }
         const cp = std.unicode.utf8Decode(source.buf[i..][0..len]) catch {
             i += 1;
             continue;