Function igraph_error_handler_printignore 

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

\var igraph_error_handler_printignore \brief Print and ignore errors.

Frees temporarily allocated memory, prints an error message to the standard error and returns with the error code.