Function igraph_error_handler_ignore 

pub unsafe extern "C" fn igraph_error_handler_ignore(
    reason: *const c_char,
    file: *const c_char,
    line: c_int,
    igraph_errno: igraph_error_t,
)

\var igraph_error_handler_ignore \brief Ignore errors.

This error handler frees the temporarily allocated memory and returns with the error code.