diff --git a/src/version.c b/src/version.c
index 61a5f0d5c2..ce78fc5e1f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2989,
 /**/
     2988,
 /**/
diff --git a/src/vim9compile.c b/src/vim9compile.c
index 1747f30fd9..be8f304528 100644
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -10045,6 +10045,13 @@ delete_def_function_contents(dfunc_T *dfunc, int mark_deleted)
 	VIM_CLEAR(dfunc->df_instr);
 	dfunc->df_instr = NULL;
     }
+    if (dfunc->df_instr_debug != NULL)
+    {
+	for (idx = 0; idx < dfunc->df_instr_debug_count; ++idx)
+	    delete_instr(dfunc->df_instr_debug + idx);
+	VIM_CLEAR(dfunc->df_instr_debug);
+	dfunc->df_instr_debug = NULL;
+    }
 #ifdef FEAT_PROFILE
     if (dfunc->df_instr_prof != NULL)
     {