diff --git a/src/librustc_driver/lib.rs b/src/librustc_driver/lib.rs index 210b1a26c21f1..7b8970876f6e3 100644 --- a/src/librustc_driver/lib.rs +++ b/src/librustc_driver/lib.rs @@ -70,6 +70,7 @@ use rustc_metadata::loader; use rustc_metadata::cstore::CStore; use rustc::util::common::time; +use std::cmp::max; use std::cmp::Ordering::Equal; use std::env; use std::io::{self, Read, Write}; @@ -627,11 +628,13 @@ Available lint options: - let max_name_len = plugin_groups.iter() - .chain(&builtin_groups) - .map(|&(s, _)| s.chars().count()) - .max() - .unwrap_or(0); + let max_name_len = max("warnings".len(), + plugin_groups.iter() + .chain(&builtin_groups) + .map(|&(s, _)| s.chars().count()) + .max() + .unwrap_or(0)); + let padded = |x: &str| { let mut s = repeat(" ") .take(max_name_len - x.chars().count()) @@ -643,6 +646,7 @@ Available lint options: println!("Lint groups provided by rustc:\n"); println!(" {} {}", padded("name"), "sub-lints"); println!(" {} {}", padded("----"), "---------"); + println!(" {} {}", padded("warnings"), "all built-in lints"); let print_lint_groups = |lints: Vec<(&'static str, Vec)>| { for (name, to) in lints {