File add_missing_iostream_include.patch of Package octave-forge-database
--- a/src/error-helpers.cc 2019-03-05 14:28:24.967487038 +0100 +++ b/src/error-helpers.cc 2019-03-05 14:40:09.977597631 +0100 @@ -19,6 +19,8 @@ #include <octave/oct.h> +#include <iostream> + #include "error-helpers.h" // call verror