auto merge of #17620 : nick29581/rust/slice4, r=aturon

cc @aturon 

r? anyone?

Author: bors

src/compiletest/compiletest.rs

@@ -9,7 +9,7 @@
 // except according to those terms.
 
 #![crate_type = "bin"]
-#![feature(phase)]
+#![feature(phase, slicing_syntax)]
 
 #![deny(warnings)]
 

src/compiletest/runtest.rs

@@ -874,7 +874,7 @@ fn check_error_patterns(props: &TestProps,
     if done { return; }
 
     let missing_patterns =
-        props.error_patterns.slice(next_err_idx, props.error_patterns.len());
+        props.error_patterns[next_err_idx..];
     if missing_patterns.len() == 1u {
         fatal_proc_rec(format!("error pattern '{}' not found!",
                               missing_patterns[0]).as_slice(),