fix for latest nightly

rust-version

@@ -1 +1 @@
-nightly-2018-12-08
+nightly-2018-12-14

src/bin/cargo-miri.rs

@@ -3,7 +3,7 @@
 extern crate cargo_metadata;
 
 use std::path::{PathBuf, Path};
-use std::io::{self, Write};
+use std::io::{self, Write, BufRead};
 use std::process::Command;
 use std::fs::{self, File};
 
@@ -114,6 +114,36 @@ fn list_targets() -> impl Iterator<Item=cargo_metadata::Target> {
     package.targets.into_iter()
 }
 
+fn xargo_version() -> Option<(u32, u32, u32)> {
+    let out = Command::new("xargo").arg("--version").output().ok()?;
+    if !out.status.success() {
+        return None;
+    }
+    // Parse output. The first line looks like "xargo 0.3.12 (b004f1c 2018-12-13)".
+    let line = out.stderr.lines().nth(0)
+        .expect("malformed `xargo --version` output: not at least one line")
+        .expect("malformed `xargo --version` output: error reading first line");
+    let version = line.split(' ').nth(1)
+        .expect("malformed `xargo --version` output: not at least two words");
+    let mut version_pieces = version.split('.');
+    let major = version_pieces.next()
+        .expect("malformed `xargo --version` output: not a major version piece")
+        .parse()
+        .expect("malformed `xargo --version` output: major version is not an integer");
+    let minor = version_pieces.next()
+        .expect("malformed `xargo --version` output: not a minor version piece")
+        .parse()
+        .expect("malformed `xargo --version` output: minor version is not an integer");
+    let patch = version_pieces.next()
+        .expect("malformed `xargo --version` output: not a patch version piece")
+        .parse()
+        .expect("malformed `xargo --version` output: patch version is not an integer");
+    if !version_pieces.next().is_none() {
+        panic!("malformed `xargo --version` output: more than three pieces in version");
+    }
+    Some((major, minor, patch))
+}
+
 fn ask(question: &str) {
     let mut buf = String::new();
     print!("{} [Y/n] ", question);
@@ -134,14 +164,15 @@ fn setup(ask_user: bool) {
     }
 
     // First, we need xargo
-    if Command::new("xargo").arg("--version").output().is_err()
-    {
+    let xargo = xargo_version();
+    if xargo.map_or(true, |v| v < (0, 3, 13)) {
         if ask_user {
-            ask("It seems you do not have xargo installed. I will run `cargo install xargo`. Proceed?");
+            ask("It seems you do not have a recent enough xargo installed. I will run `cargo install xargo -f`. Proceed?");
         } else {
-            println!("Installing xargo: `cargo install xargo`");
+            println!("Installing xargo: `cargo install xargo -f`");
         }
-        if !Command::new("cargo").args(&["install", "xargo"]).status().unwrap().success() {
+        // FIXME: Go back to using releases, once a 0.3.13 got released.
+        if !Command::new("cargo").args(&["install", "xargo", "-f", "--git", "https://github.com/japaric/xargo"]).status().unwrap().success() {
             show_error(format!("Failed to install xargo"));
         }
     }

tests/compiletest.rs

@@ -77,9 +77,7 @@ fn miri_pass(path: &str, target: &str, opt: bool) {
     flags.push("-Dwarnings -Dunused".to_owned()); // overwrite the -Aunused in compiletest-rs
     flags.push("--edition 2018".to_owned());
     if opt {
-        // FIXME: We use opt level 1 because MIR inlining defeats the validation
-        // whitelist.
-        flags.push("-Zmir-opt-level=1".to_owned());
+        flags.push("-Zmir-opt-level=3".to_owned());
     }
 
     let mut config = mk_config("ui");

tests/run-pass/foreign-fn-linkname.rs

@@ -10,7 +10,7 @@
 
 //ignore-windows: Uses POSIX APIs
 
-#![feature(libc)]
+#![feature(rustc_private)]
 #![allow(unused_extern_crates)] // rustc bug https://github.com/rust-lang/rust/issues/56098
 
 extern crate libc;

tests/run-pass/function_pointers.rs

@@ -10,12 +10,12 @@ fn h(i: i32, j: i32) -> i32 {
     j * i * 7
 }
 
-fn return_fn_ptr() -> fn() -> i32 {
+fn return_fn_ptr(f: fn() -> i32) -> fn() -> i32 {
     f
 }
 
 fn call_fn_ptr() -> i32 {
-    return_fn_ptr()()
+    return_fn_ptr(f)()
 }
 
 fn indirect<F: Fn() -> i32>(f: F) -> i32 { f() }
@@ -41,6 +41,7 @@ fn main() {
     assert_eq!(indirect3(h), 210);
     assert_eq!(indirect_mut3(h), 210);
     assert_eq!(indirect_once3(h), 210);
-    assert!(return_fn_ptr() == f);
-    assert!(return_fn_ptr() as unsafe fn() -> i32 == f as fn() -> i32 as unsafe fn() -> i32);
+    let g = f as fn() -> i32;
+    assert!(return_fn_ptr(g) == g);
+    assert!(return_fn_ptr(g) as unsafe fn() -> i32 == g as fn() -> i32 as unsafe fn() -> i32);
 }

tests/run-pass/mir_coercions.rs

@@ -60,7 +60,10 @@ fn main() {
     let a = [0,1,2];
     let square_local : fn(u32) -> u32 = square;
     let (f,g) = fn_coercions(&square_local);
-    assert_eq!(f as *const (), square as *const());
+    // cannot use `square as *const ()` because we can't know whether the compiler duplicates
+    // functions, so two function pointers are only equal if they result from the same function
+    // to function pointer cast
+    assert_eq!(f as *const (), square_local as *const());
     assert_eq!(g(4), 16);
     assert_eq!(identity_coercion(g)(5), 25);
 

tests/run-pass/regions-mock-trans.rs

@@ -10,7 +10,7 @@
 
 //ignore-windows: Uses POSIX APIs
 
-#![feature(libc)]
+#![feature(rustc_private)]
 
 #![allow(dead_code)]
 

tests/run-pass/thread-local.rs

@@ -1,6 +1,6 @@
 //ignore-windows: Uses POSIX APIs
 
-#![feature(libc)]
+#![feature(rustc_private)]
 extern crate libc;
 
 use std::mem;

tests/run-pass/vecdeque.rs

@@ -1,6 +1,3 @@
-// FIXME: Validation disabled until https://github.com/rust-lang/rust/pull/56161 lands
-// compile-flags: -Zmiri-disable-validation
-
 use std::collections::VecDeque;
 
 fn main() {

travis.sh

@@ -11,20 +11,20 @@ else
 fi
 
 echo "Build and install miri"
-cargo build --release --all-features --all-targets &&
+cargo build --release --all-features --all-targets
 cargo install --all-features --force --path .
 echo
 
 echo "Get ourselves a MIR-full libstd for the host and a foreign architecture"
-cargo miri setup &&
+cargo miri setup
 cargo miri setup --target "$FOREIGN_TARGET"
 echo
 
 echo "Test miri with full MIR, on the host and other architectures"
-MIRI_SYSROOT=$MIRI_SYSROOT_BASE/HOST cargo test --release --all-features &&
-MIRI_SYSROOT=$MIRI_SYSROOT_BASE MIRI_TARGET=$FOREIGN_TARGET cargo test --release --all-features
+MIRI_SYSROOT="$MIRI_SYSROOT_BASE"/HOST cargo test --release --all-features
+MIRI_SYSROOT="$MIRI_SYSROOT_BASE" MIRI_TARGET="$FOREIGN_TARGET" cargo test --release --all-features
 echo
 
 echo "Test cargo integration"
-(cd test-cargo-miri && MIRI_SYSROOT=$MIRI_SYSROOT_BASE/HOST ./run-test.py)
+(cd test-cargo-miri && MIRI_SYSROOT="$MIRI_SYSROOT_BASE"/HOST ./run-test.py)
 echo