rollup merge of rust-lang#20157: alexcrichton/issue-20068

Author: alexcrichton

src/compiletest/compiletest.rs

@@ -22,8 +22,8 @@ extern crate regex;
 use std::os;
 use std::io;
 use std::io::fs;
-use std::str::FromStr;
-use std::thunk::{Thunk};
+use std::str::{FromStr, from_str};
+use std::thunk::Thunk;
 use getopts::{optopt, optflag, reqopt};
 use common::Config;
 use common::{Pretty, DebugInfoGdb, DebugInfoLldb, Codegen};

src/doc/guide-ffi.md

@@ -450,6 +450,8 @@ them.
 
 ~~~no_run
 extern crate libc;
+
+use std::c_str::ToCStr;
 use std::ptr;
 
 #[link(name = "readline")]