vim-patch:8.0.0155

Problem:    When sorting zero elements a NULL pointer is passed to qsort(),
            which ubsan warns for.
Solution:   Don't call qsort() if there are no elements. (Dominique Pelle)

https://github.com/vim/vim/commit/a216255a4faa91a15e7005ac319f2f62294f3f9e

1 files changed, 6 insertions, 3 deletions

diff --git a/src/nvim/syntax.c b/src/nvim/syntax.c
index 65c0e2464a..5781424d2b 100644
--- a/src/nvim/syntax.c
+++ b/src/nvim/syntax.c
@@ -5845,9 +5845,12 @@ static void syntime_report(void)
     }
   }
 
-  /* sort on total time */
-  qsort(ga.ga_data, (size_t)ga.ga_len, sizeof(time_entry_T),
-      syn_compare_syntime);
+  // Sort on total time. Skip if there are no items to avoid passing NULL
+  // pointer to qsort().
+  if (ga.ga_len > 1) {
+    qsort(ga.ga_data, (size_t)ga.ga_len, sizeof(time_entry_T),
+          syn_compare_syntime);
+  }
 
   MSG_PUTS_TITLE(_(
           "  TOTAL      COUNT  MATCH   SLOWEST     AVERAGE   NAME               PATTERN"));