fix errors

1 files changed, 2 insertions, 0 deletions

diff --git a/editors/code/src/snippets.ts b/editors/code/src/snippets.ts
index 7b7e528f6..dc53ebe2e 100644
--- a/editors/code/src/snippets.ts
+++ b/editors/code/src/snippets.ts
@@ -62,6 +62,8 @@ function parseSnippet(snip: string): [string, [number, number]] | undefined {
     const m = snip.match(/\$(0|\{0:([^}]*)\})/);
     if (!m) return undefined;
     const placeholder = m[2] ?? "";
+    if (m.index == null)
+        return undefined;
     const range: [number, number] = [m.index, placeholder.length];
     const insert = snip.replace(m[0], placeholder);
     return [insert, range];