Auto merge of #63380 - Centril:rollup-tzfhtnu, r=Centril

Rollup of 8 pull requests

Successful merges:

 - #63261 (bump rand in libcore/liballoc test suites)
 - #63316 (Update rustfmt to 1.4.4)
 - #63332 (Add an overflow check in truncate implementation for Unix.)
 - #63342 (Don't use remap-path-prefix in dep-info files.)
 - #63366 (doc: Fix typo in float from bytes methods)
 - #63370 (Fix ICE #63364)
 - #63377 (Improved documentation for compile_error!())
 - #63379 (Add test for issue 53096)

Failed merges:

r? @ghost

Cargo.lock

@@ -19,8 +19,8 @@ version = "0.0.0"
 dependencies = [
  "compiler_builtins 0.1.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "core 0.0.0",
- "rand 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_xorshift 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_xorshift 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -514,7 +514,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 name = "core"
 version = "0.0.0"
 dependencies = [
- "rand 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1050,7 +1050,7 @@ dependencies = [
 
 [[package]]
 name = "getrandom"
-version = "0.1.7"
+version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cfg-if 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2246,7 +2246,7 @@ name = "rand"
 version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "getrandom 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "getrandom 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_chacha 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2286,7 +2286,7 @@ name = "rand_core"
 version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "getrandom 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "getrandom 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -2343,6 +2343,14 @@ dependencies = [
  "rand_core 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "rand_xorshift"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "rayon"
 version = "1.1.0"
@@ -2501,7 +2509,7 @@ dependencies = [
  "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-workspace-hack 1.0.0",
  "rustc_tools_util 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustfmt-nightly 1.4.3",
+ "rustfmt-nightly 1.4.4",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.81 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_ignored 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3284,7 +3292,7 @@ dependencies = [
 
 [[package]]
 name = "rustfmt-nightly"
-version = "1.4.3"
+version = "1.4.4"
 dependencies = [
  "annotate-snippets 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -4436,7 +4444,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum fwdansi 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "34dd4c507af68d37ffef962063dfa1944ce0dd4d5b82043dbab1dabe088610c3"
 "checksum generic-array 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ef25c5683767570c2bbd7deba372926a55eaae9982d7726ee2a1050239d45b9d"
 "checksum getopts 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)" = "72327b15c228bfe31f1390f93dd5e9279587f0463836393c9df719ce62a3e450"
-"checksum getrandom 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "cd8e190892c840661957ba9f32dacfb3eb405e657f9f9f60485605f0bb37d6f8"
+"checksum getrandom 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "34f33de6f0ae7c9cb5e574502a562e2b512799e32abb801cd1e79ad952b62b49"
 "checksum git2 0.9.2 (registry+https://github.com/rust-lang/crates.io-index)" = "8cb400360e8a4d61b10e648285bbfa919bbf9519d0d5d5720354456f44349226"
 "checksum git2-curl 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2293de73491c3dc4174c5949ef53d2cc037b27613f88d72032e3f5237247a7dd"
 "checksum glob 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "9b919933a397b79c37e33b77bb2aa3dc8eb6e165ad809e58ff75bc7db2e34574"
@@ -4567,6 +4575,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum rand_os 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "7b75f676a1e053fc562eafbb47838d67c84801e38fc1ba459e8f180deabd5071"
 "checksum rand_pcg 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "086bd09a33c7044e56bb44d5bdde5a60e7f119a9e95b0775f545de759a32fe05"
 "checksum rand_xorshift 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "effa3fcaa47e18db002bdde6060944b6d2f9cfd8db471c30e873448ad9187be3"
+"checksum rand_xorshift 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "77d416b86801d23dde1aa643023b775c3a462efc0ed96443add11546cdf1dca8"
 "checksum rayon 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a4b0186e22767d5b9738a05eab7c6ac90b15db17e5b5f9bd87976dd7d89a10a4"
 "checksum rayon-core 1.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ebbe0df8435ac0c397d467b6cad6d25543d06e8a019ef3f6af3c384597515bd2"
 "checksum rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "678054eb77286b51581ba43620cc911abf02758c91f93f479767aed0f90458b2"

src/liballoc/Cargo.toml

@@ -15,8 +15,8 @@ core = { path = "../libcore" }
 compiler_builtins = { version = "0.1.10", features = ['rustc-dep-of-std'] }
 
 [dev-dependencies]
-rand = "0.6"
-rand_xorshift = "0.1"
+rand = "0.7"
+rand_xorshift = "0.2"
 
 [[test]]
 name = "collectionstests"

src/liballoc/benches/slice.rs

@@ -186,12 +186,12 @@ const SEED: [u8; 16] = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
 
 fn gen_random(len: usize) -> Vec<u64> {
     let mut rng = XorShiftRng::from_seed(SEED);
-    rng.sample_iter(&Standard).take(len).collect()
+    (&mut rng).sample_iter(&Standard).take(len).collect()
 }
 
 fn gen_random_bytes(len: usize) -> Vec<u8> {
     let mut rng = XorShiftRng::from_seed(SEED);
-    rng.sample_iter(&Standard).take(len).collect()
+    (&mut rng).sample_iter(&Standard).take(len).collect()
 }
 
 fn gen_mostly_ascending(len: usize) -> Vec<u64> {
@@ -221,14 +221,14 @@ fn gen_strings(len: usize) -> Vec<String> {
     let mut v = vec![];
     for _ in 0..len {
         let n = rng.gen::<usize>() % 20 + 1;
-        v.push(rng.sample_iter(&Alphanumeric).take(n).collect());
+        v.push((&mut rng).sample_iter(&Alphanumeric).take(n).collect());
     }
     v
 }
 
 fn gen_big_random(len: usize) -> Vec<[u64; 16]> {
     let mut rng = XorShiftRng::from_seed(SEED);
-    rng.sample_iter(&Standard).map(|x| [x; 16]).take(len).collect()
+    (&mut rng).sample_iter(&Standard).map(|x| [x; 16]).take(len).collect()
 }
 
 macro_rules! sort {

src/libcore/Cargo.toml

@@ -21,7 +21,7 @@ name = "corebenches"
 path = "../libcore/benches/lib.rs"
 
 [dev-dependencies]
-rand = "0.6"
+rand = "0.7"
 
 [features]
 # Make panics and failed asserts immediately abort without formatting any message

src/libcore/macros.rs

@@ -680,7 +680,7 @@ pub(crate) mod builtin {
     ///
     /// This macro should be used when a crate uses a conditional compilation strategy to provide
     /// better error messages for erroneous conditions. It's the compiler-level form of [`panic!`],
-    /// which emits an error at *runtime*, rather than during compilation.
+    /// but emits an error during *compilation* rather than at *runtime*.
     ///
     /// # Examples
     ///

src/libcore/num/f32.rs

@@ -536,7 +536,7 @@ impl f32 {
         Self::from_bits(u32::from_be_bytes(bytes))
     }
 
-    /// Create a floating point value from its representation as a byte array in big endian.
+    /// Create a floating point value from its representation as a byte array in little endian.
     ///
     /// # Examples
     ///
@@ -551,7 +551,7 @@ impl f32 {
         Self::from_bits(u32::from_le_bytes(bytes))
     }
 
-    /// Create a floating point value from its representation as a byte array in big endian.
+    /// Create a floating point value from its representation as a byte array in native endian.
     ///
     /// As the target platform's native endianness is used, portable code
     /// likely wants to use [`from_be_bytes`] or [`from_le_bytes`], as

src/libcore/num/f64.rs

@@ -549,7 +549,7 @@ impl f64 {
         Self::from_bits(u64::from_be_bytes(bytes))
     }
 
-    /// Create a floating point value from its representation as a byte array in big endian.
+    /// Create a floating point value from its representation as a byte array in little endian.
     ///
     /// # Examples
     ///
@@ -564,7 +564,7 @@ impl f64 {
         Self::from_bits(u64::from_le_bytes(bytes))
     }
 
-    /// Create a floating point value from its representation as a byte array in big endian.
+    /// Create a floating point value from its representation as a byte array in native endian.
     ///
     /// As the target platform's native endianness is used, portable code
     /// likely wants to use [`from_be_bytes`] or [`from_le_bytes`], as

src/libcore/tests/num/flt2dec/random.rs

@@ -8,8 +8,8 @@ use core::num::flt2dec::strategy::grisu::format_exact_opt;
 use core::num::flt2dec::strategy::grisu::format_shortest_opt;
 use core::num::flt2dec::{decode, DecodableFloat, FullDecoded, Decoded};
 
-use rand::FromEntropy;
-use rand::rngs::SmallRng;
+use rand::SeedableRng;
+use rand::rngs::StdRng;
 use rand::distributions::{Distribution, Uniform};
 
 pub fn decode_finite<T: DecodableFloat>(v: T) -> Decoded {
@@ -65,7 +65,7 @@ pub fn f32_random_equivalence_test<F, G>(f: F, g: G, k: usize, n: usize)
     if cfg!(target_os = "emscripten") {
         return // using rng pulls in i128 support, which doesn't work
     }
-    let mut rng = SmallRng::from_entropy();
+    let mut rng = StdRng::from_entropy();
     let f32_range = Uniform::new(0x0000_0001u32, 0x7f80_0000);
     iterate("f32_random_equivalence_test", k, n, f, g, |_| {
         let x = f32::from_bits(f32_range.sample(&mut rng));
@@ -79,7 +79,7 @@ pub fn f64_random_equivalence_test<F, G>(f: F, g: G, k: usize, n: usize)
     if cfg!(target_os = "emscripten") {
         return // using rng pulls in i128 support, which doesn't work
     }
-    let mut rng = SmallRng::from_entropy();
+    let mut rng = StdRng::from_entropy();
     let f64_range = Uniform::new(0x0000_0000_0000_0001u64, 0x7ff0_0000_0000_0000);
     iterate("f64_random_equivalence_test", k, n, f, g, |_| {
         let x = f64::from_bits(f64_range.sample(&mut rng));

src/libcore/tests/slice.rs

@@ -1157,7 +1157,7 @@ fn test_rotate_right() {
 fn sort_unstable() {
     use core::cmp::Ordering::{Equal, Greater, Less};
     use core::slice::heapsort;
-    use rand::{FromEntropy, Rng, rngs::SmallRng, seq::SliceRandom};
+    use rand::{SeedableRng, Rng, rngs::StdRng, seq::SliceRandom};
 
     #[cfg(not(miri))] // Miri is too slow
     let large_range = 500..510;
@@ -1171,7 +1171,7 @@ fn sort_unstable() {
 
     let mut v = [0; 600];
     let mut tmp = [0; 600];
-    let mut rng = SmallRng::from_entropy();
+    let mut rng = StdRng::from_entropy();
 
     for len in (2..25).chain(large_range) {
         let v = &mut v[0..len];
@@ -1237,11 +1237,11 @@ fn sort_unstable() {
 #[cfg(not(miri))] // Miri is too slow
 fn partition_at_index() {
     use core::cmp::Ordering::{Equal, Greater, Less};
-    use rand::rngs::SmallRng;
+    use rand::rngs::StdRng;
     use rand::seq::SliceRandom;
-    use rand::{FromEntropy, Rng};
+    use rand::{SeedableRng, Rng};
 
-    let mut rng = SmallRng::from_entropy();
+    let mut rng = StdRng::from_entropy();
 
     for len in (2..21).chain(500..501) {
         let mut orig = vec![0; len];

src/librustc_interface/passes.rs

@@ -661,7 +661,7 @@ fn write_out_deps(compiler: &Compiler, outputs: &OutputFilenames, out_filenames:
             .iter()
             .filter(|fmap| fmap.is_real_file())
             .filter(|fmap| !fmap.is_imported())
-            .map(|fmap| escape_dep_filename(&fmap.name))
+            .map(|fmap| escape_dep_filename(&fmap.unmapped_path.as_ref().unwrap_or(&fmap.name)))
             .collect();
 
         if sess.binary_dep_depinfo() {

src/librustc_lint/types.rs

@@ -73,7 +73,9 @@ fn lint_overflowing_range_endpoint<'a, 'tcx>(
     // We only want to handle exclusive (`..`) ranges,
     // which are represented as `ExprKind::Struct`.
     if let ExprKind::Struct(_, eps, _) = &parent_expr.node {
-        debug_assert_eq!(eps.len(), 2);
+        if eps.len() != 2 {
+            return false;
+        }
         // We can suggest using an inclusive range
         // (`..=`) instead only if it is the `end` that is
         // overflowing and only by 1.

src/libstd/fs.rs

@@ -468,6 +468,8 @@ impl File {
     /// # Errors
     ///
     /// This function will return an error if the file is not opened for writing.
+    /// Also, std::io::ErrorKind::InvalidInput will be returned if the desired
+    /// length would cause an overflow due to the implementation specifics.
     ///
     /// # Examples
     ///

src/libstd/sys/unix/fs.rs

@@ -557,9 +557,15 @@ impl File {
         return crate::sys::android::ftruncate64(self.0.raw(), size);
 
         #[cfg(not(target_os = "android"))]
-        return cvt_r(|| unsafe {
-            ftruncate64(self.0.raw(), size as off64_t)
-        }).map(|_| ());
+        {
+            use crate::convert::TryInto;
+            let size: off64_t = size
+                .try_into()
+                .map_err(|e| io::Error::new(io::ErrorKind::InvalidInput, e))?;
+            cvt_r(|| unsafe {
+                ftruncate64(self.0.raw(), size)
+            }).map(|_| ())
+        }
     }
 
     pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> {

src/test/ui/issues/issue-63364.rs

@@ -0,0 +1,10 @@
+fn part(_: u16) -> u32 {
+    1
+}
+
+fn main() {
+    for n in 100_000.. {
+    //~^ ERROR: literal out of range for `u16`
+        let _ = part(n);
+    }
+}

src/test/ui/issues/issue-63364.stderr

@@ -0,0 +1,10 @@
+error: literal out of range for `u16`
+  --> $DIR/issue-63364.rs:6:14
+   |
+LL |     for n in 100_000.. {
+   |              ^^^^^^^
+   |
+   = note: `#[deny(overflowing_literals)]` on by default
+
+error: aborting due to previous error
+

src/test/ui/type-alias-impl-trait/issue-53096.rs

@@ -0,0 +1,9 @@
+// check-pass
+#![feature(const_fn)]
+#![feature(type_alias_impl_trait)]
+
+type Foo = impl Fn() -> usize;
+const fn bar() -> Foo { || 0usize }
+const BAZR: Foo = bar();
+
+fn main() {}