fix: check `result` when determining exit code of `ls <filter>`

PR-URL: https://github.com/npm/cli/pull/1986
Credit: @G-Rath
Close: #1986
Reviewed-by: @ruyadorno

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/ls.js b/lib/ls.js
index d55cdfb45..2dd6e4d4e 100644
--- a/lib/ls.js
+++ b/lib/ls.js
@@ -488,7 +488,7 @@ const ls = async (args) => {
   )
 
   // if filtering items, should exit with error code on no results
-  if (!tree[_include] && args.length) {
+  if (result && !result[_include] && args.length) {
     process.exitCode = 1
   }