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-rw-r--r--js/codeq/python.js2
1 files changed, 1 insertions, 1 deletions
diff --git a/js/codeq/python.js b/js/codeq/python.js
index 1d4ee17..a8d4c95 100644
--- a/js/codeq/python.js
+++ b/js/codeq/python.js
@@ -321,7 +321,7 @@
editor.setValue(info.solution);
$('#title').text(problem.slug);
jqDescription.html(problem.description);
- $('#btn_code_plan').prop('disabled', problem.plan.length == 0);
+ $('#btn_code_plan').prop('disabled', (problem.plan || '').length == 0);
editor.on('change', function (instance, changeObj) {
var doc = editor.getDoc(),