patch 8.2.1255: cannot use a lambda with quickfix functions
Problem: Cannot use a lambda with quickfix functions.
Solution: Add support for lambda. (Yegappan Lakshmanan, closes #6499)
diff --git a/src/proto/evalvars.pro b/src/proto/evalvars.pro
index a108310..43c2528 100644
--- a/src/proto/evalvars.pro
+++ b/src/proto/evalvars.pro
@@ -88,5 +88,6 @@
callback_T get_callback(typval_T *arg);
void put_callback(callback_T *cb, typval_T *tv);
void set_callback(callback_T *dest, callback_T *src);
+void copy_callback(callback_T *dest, callback_T *src);
void free_callback(callback_T *callback);
/* vim: set ft=c : */