fs: copy: Add EPERM to fallback error conditions

[nicokoch]

Fixes #51266

[rust-highfive]

r? @sfackler

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[rust-highfive]

The job x86_64-gnu-llvm-3.9 of your PR failed on Travis (raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

[00:03:20]    Compiling std_unicode v0.0.0 (file:///checkout/src/libstd_unicode)
[00:03:21]    Compiling alloc_system v0.0.0 (file:///checkout/src/liballoc_system)
[00:03:21]    Compiling panic_abort v0.0.0 (file:///checkout/src/libpanic_abort)
[00:03:25]    Compiling panic_unwind v0.0.0 (file:///checkout/src/libpanic_unwind)
[00:03:26] error: unexpected token `||` after pattern
[00:03:26]    --> libstd/sys/unix/fs.rs:894:40
[00:03:26]     |
[00:03:26] 894 |                     Some(libc::ENOSYS) || Some(libc::EPERM) => {
[00:03:26]     |                                        ^^ help: use a single `|` to specify multiple patterns: `|`
[00:03:26] error: aborting due to previous error
[00:03:26] 
[00:03:26] error: Could not compile `std`.
[00:03:26] 
[00:03:26] 
[00:03:26] Caused by:
[00:03:26]   process didn't exit successfully: `/checkout/obj/build/bootstrap/debug/rustc --crate-name std libstd/lib.rs --color always --error-format json --crate-type dylib --crate-type rlib --emit=dep-info,link -C prefer-dynamic -C opt-level=2 --cfg feature="alloc_jemalloc" --cfg feature="backtrace" --cfg feature="jemalloc" --cfg feature="panic-unwind" --cfg feature="panic_unwind" -C metadata=fc6b9a3d7065b2e2 -C extra-filename=-fc6b9a3d7065b2e2 --out-dir /checkout/obj/build/x86_64-unknown-linux-gnu/stage0-std/x86_64-unknown-linux-gnu/release/deps --target x86_64-unknown-linux-gnu -L dependency=/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-std/x86_64-unknown-linux-gnu/release/deps -L dependency=/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-std/release/deps --extern core=/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-std/x86_64-unknown-linux-gnu/release/deps/libcore-e9cdce497aae9e81.rlib --extern compiler_builtins=/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-std/x86_64-unknown-linux-gnu/release/deps/libcompiler_builtins-90a13cda2e54742f.rlib --extern std_unicode=/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-std/x86_64-unknown-linux-gnu/release/deps/libstd_unicode-18039a1361938ca9.rlib --extern unwind=/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-std/x86_64-unknown-linux-gnu/release/deps/libunwind-bd02867d7573c11e.rlib --extern rustc_asan=/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-std/x86_64-unknown-linux-gnu/release/deps/librustc_asan-a72c0fa0b2d5877e.rlib --extern libc=/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-std/x86_64-unknown-linux-gnu/release/deps/liblibc-223f966213a60acb.rlib --extern alloc=/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-std/x86_64-unknown-linux-gnu/release/deps/liballoc-d6cd5f8b78fddf12.rlib --extern alloc_system=/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-std/x86_64-unknown-linux-gnu/release/deps/liballoc_system-386e278237d725f5.rlib --extern alloc_jemalloc=/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-std/x86_64-unknown-linux-gnu/release/deps/liballoc_jemalloc-5e6c2ac297f2c2e3.rlib --extern rustc_lsan=/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-std/x86_64-unknown-linux-gnu/release/deps/librustc_lsan-a2f6e9f263c82267.rlib --extern panic_abort=/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-std/x86_64-unknown-linux-gnu/release/deps/libpanic_abort-5f4d07ea9b3edda4.rlib --extern panic_unwind=/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-std/x86_64-unknown-linux-gnu/release/deps/libpanic_unwind-2bd12fd5ac9768f9.rlib --extern rustc_tsan=/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-std/x86_64-unknown-linux-gnu/release/deps/librustc_tsan-ccd411645051f1ef.rlib --extern rustc_msan=/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-std/x86_64-unknown-linux-gnu/release/deps/librustc_msan-ce1ae9dbeb02af61.rlib -L native=/checkout/obj/build/x86_64-unknown-linux-gnu/native/libbacktrace/ -L native=/checkout/obj/build/x86_64-unknown-linux-gnu/native/libbacktrace -l static=backtrace -l static=backtrace -l dl -l rt -l pthread -L native=/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-std/x86_64-unknown-linux-gnu/release/build/compiler_builtins-ffd422941bf53e42/out -L native=/checkout/obj/build/x86_64-unknown-linux-gnu/native/jemalloc/lib` (exit code: 101)
[00:03:26] command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo" "build" "--target" "x86_64-unknown-linux-gnu" "-j" "4" "--release" "--locked" "--color" "always" "--features" "panic-unwind jemalloc backtrace" "--manifest-path" "/checkout/src/libstd/Cargo.toml" "--message-format" "json"
[00:03:26] expected success, got: exit code: 101
[00:03:26] thread 'main' panicked at 'cargo must succeed', bootstrap/compile.rs:1091:9
[00:03:26] travis_fold:end:stage0-std

[00:03:26] travis_time:end:stage0-std:start=1527838318998576622,finish=1527838351287992777,duration=32289416155


[00:03:26] failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test src/tools/tidy
[00:03:26] Build completed unsuccessfully in 0:00:33
[00:03:26] Makefile:79: recipe for target 'tidy' failed
[00:03:26] make: *** [tidy] Error 1

The command "stamp sh -x -c "$RUN_SCRIPT"" exited with 2.
travis_time:start:3261c588
$ date && (curl -fs --head https://google.com | grep ^Date: | sed 's/Date: //g' || true)

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[TimNN]

@bors r+

[bors]

📌 Commit 2c3eff9 has been approved by TimNN

[bors]

⌛ Testing commit 2c3eff9 with merge edae1cc...

[bors]

☀️ Test successful - status-appveyor, status-travis
Approved by: TimNN
Pushing edae1cc to master...