Test fixes from the rollup

Closes rust-lang#16097 (fix variable name in tutorial)
Closes rust-lang#16100 (More defailbloating)
Closes rust-lang#16104 (Fix deprecation commment on `core::cmp::lexical_ordering`)
Closes rust-lang#16105 (fix formatting in pointer guide table)
Closes rust-lang#16107 (remove serialize::ebml, add librbml)
Closes rust-lang#16108 (Fix heading levels in pointer guide)
Closes rust-lang#16109 (rustrt: Don't conditionally init the at_exit QUEUE)
Closes rust-lang#16111 (hexfloat: Deprecate to move out of the repo)
Closes rust-lang#16113 (Add examples for GenericPath methods.)
Closes rust-lang#16115 (Byte literals!)
Closes rust-lang#16116 (Add a non-regression test for issue rust-lang#8372)
Closes rust-lang#16120 (Deprecate semver)
Closes rust-lang#16124 (Deprecate uuid)
Closes rust-lang#16126 (Deprecate fourcc)
Closes rust-lang#16127 (Remove incorrect example)
Closes rust-lang#16129 (Add note about production deployments.)
Closes rust-lang#16131 (librustc: Don't ICE when trying to subst regions in destructor call.)
Closes rust-lang#16133 (librustc: Don't ICE with struct exprs where the name is not a valid struct.)
Closes rust-lang#16136 (Implement slice::Vector for Option<T> and CVec<T>)
Closes rust-lang#16137 (alloc, arena, test, url, uuid: Elide lifetimes.)

Author: alexcrichton

src/librustrt/task.rs

@@ -649,7 +649,7 @@ mod test {
     #[should_fail]
     fn test_begin_unwind() {
         use std::rt::unwind::begin_unwind;
-        begin_unwind("cause", file!(), line!())
+        begin_unwind("cause", &(file!(), line!()))
     }
 
     #[test]

src/libuuid/lib.rs

@@ -29,6 +29,8 @@ unlikely.
 To create a new random (V4) UUID and print it out in hexadecimal form:
 
 ```rust
+# #![allow(deprecated)]
+# extern crate uuid;
 use uuid::Uuid;
 
 fn main() {

src/test/auxiliary/lang-item-public.rs

@@ -12,7 +12,7 @@
 #![feature(lang_items)]
 
 #[lang="fail_"]
-fn fail(_: &'static str, _: &'static str, _: uint) -> ! { loop {} }
+fn fail(_: &(&'static str, &'static str, uint)) -> ! { loop {} }
 
 #[lang = "stack_exhausted"]
 extern fn stack_exhausted() {}

src/test/run-pass/backtrace.rs

@@ -24,7 +24,10 @@ fn start(argc: int, argv: *const *const u8) -> int {
 
 #[inline(never)]
 fn foo() {
-    fail!()
+    let _v = vec![1i, 2, 3];
+    if os::getenv("IS_TEST").is_some() {
+        fail!()
+    }
 }
 
 #[inline(never)]
@@ -37,32 +40,35 @@ fn double() {
 }
 
 fn runtest(me: &str) {
+    let mut template = Command::new(me);
+    template.env("IS_TEST", "1");
+
     // Make sure that the stack trace is printed
-    let mut p = Command::new(me).arg("fail").env("RUST_BACKTRACE", "1").spawn().unwrap();
+    let p = template.clone().arg("fail").env("RUST_BACKTRACE", "1").spawn().unwrap();
     let out = p.wait_with_output().unwrap();
     assert!(!out.status.success());
     let s = str::from_utf8(out.error.as_slice()).unwrap();
     assert!(s.contains("stack backtrace") && s.contains("foo::h"),
             "bad output: {}", s);
 
     // Make sure the stack trace is *not* printed
-    let mut p = Command::new(me).arg("fail").spawn().unwrap();
+    let p = template.clone().arg("fail").spawn().unwrap();
     let out = p.wait_with_output().unwrap();
     assert!(!out.status.success());
     let s = str::from_utf8(out.error.as_slice()).unwrap();
     assert!(!s.contains("stack backtrace") && !s.contains("foo::h"),
             "bad output2: {}", s);
 
     // Make sure a stack trace is printed
-    let mut p = Command::new(me).arg("double-fail").spawn().unwrap();
+    let p = template.clone().arg("double-fail").spawn().unwrap();
     let out = p.wait_with_output().unwrap();
     assert!(!out.status.success());
     let s = str::from_utf8(out.error.as_slice()).unwrap();
     assert!(s.contains("stack backtrace") && s.contains("double::h"),
             "bad output3: {}", s);
 
     // Make sure a stack trace isn't printed too many times
-    let mut p = Command::new(me).arg("double-fail")
+    let p = template.clone().arg("double-fail")
                                 .env("RUST_BACKTRACE", "1").spawn().unwrap();
     let out = p.wait_with_output().unwrap();
     assert!(!out.status.success());