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-rw-r--r--ext/readline/readline.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/ext/readline/readline.c b/ext/readline/readline.c
index 84b98f0..dbee8c7 100644
--- a/ext/readline/readline.c
+++ b/ext/readline/readline.c
@@ -79,6 +79,8 @@ readline_attempted_completion_function(char *text, int start, int end)
int i, matches;
proc = rb_iv_get(mReadline, COMPLETION_PROC);
+ if (NIL_P(proc))
+ return NULL;
rl_attempted_completion_over = 1;
case_fold = RTEST(rb_iv_get(mReadline, COMPLETION_CASE_FOLD));
ary = rb_funcall(proc, rb_intern("call"), 1, rb_str_new2(text));