Added 'C_C++/readline_rl_redisplay_function_NULL.c'

C_C++/readline_rl_redisplay_function_NULL.c

@@ -0,0 +1,17 @@
+// @BAKE gcc $@ -o rl.out $(pkg-config --libs readline) -g
+#include <stdio.h>
+#include <readline/readline.h>
+
+int main(void) {
+    /* Variable: rl_voidfunc_t * rl_redisplay_function
+     *  If non-zero, Readline will call indirectly through this pointer to update
+     *  the display with the current contents of the editing buffer.
+     *  By default, it is set to rl_redisplay,
+     *  the default Readline redisplay function (see Redisplay).
+     */
+    rl_redisplay_function = NULL;
+    // The above documentation quote is correct, but forgets to add "else segfault"
+
+    char * input = readline("> ");
+    puts(input);
+}