Fix indentation error in js.el

* lisp/progmodes/js.el (js--indent-in-array-comp): Wrap forward-sexp
call in condition-case.
* test/lisp/progmodes/js-tests.el (js-mode-indentation-error): New
test.

1 files changed, 10 insertions, 0 deletions

diff --git a/test/lisp/progmodes/js-tests.el b/test/lisp/progmodes/js-tests.el
index 99f5898525b..07e659af605 100644
--- a/test/lisp/progmodes/js-tests.el
+++ b/test/lisp/progmodes/js-tests.el
@@ -118,6 +118,16 @@ if (!/[ (:,='\"]/.test(value)) {
       ;; implementation not recognizing the comment example.
       (should-not (syntax-ppss-context (syntax-ppss))))))
 
+(ert-deftest js-mode-indentation-error ()
+  (with-temp-buffer
+    (js-mode)
+    ;; The bug previously was that requesting re-indentation on the
+    ;; "{" line here threw an exception.
+    (insert "const TESTS = [\n{")
+    (js-indent-line)
+    ;; Any success is ok here.
+    (should t)))
+
 (provide 'js-tests)
 
 ;;; js-tests.el ends here