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‎_posts/2017-04-27-Rust-1.17.md

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@@ -220,73 +220,74 @@ SocketAddr::from(([127, 0, 0, 1], 3000))
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([127, 0, 0, 1], 3000).into())
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``
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This removes some uneccesary run-time parsing, and is roughly as readable, depending on
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This removes some unnecesary run-time parsing, and is roughly as readable, depending on
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your preferences.
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Backtraces [now have nicer formatting](https://github.com/rust-lang/rust/pull/38165), eliding
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many internal stack frames by default. For example, the full backtrace:
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some things by default. For example, the full backtrace:
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```text
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thread 'main' panicked at 'This function never returns!', t.rs:2
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thread 'main' panicked at 'explicit panic', foo.rs:2
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stack backtrace:
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0: 0x558ddf666478 - std::sys::imp::backtrace::tracing::imp::unwind_backtrace::hec84c9dd8389cc5d
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at /home/yamakaky/dev/rust/rust/src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
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1: 0x558ddf65d90e - std::sys_common::backtrace::_print::hfa25f8b31f4b4353
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at /home/yamakaky/dev/rust/rust/src/libstd/sys_common/backtrace.rs:71
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2: 0x558ddf65cb5e - std::sys_common::backtrace::print::h9b711e11ac3ba805
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at /home/yamakaky/dev/rust/rust/src/libstd/sys_common/backtrace.rs:60
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3: 0x558ddf66796e - std::panicking::default_hook::{{closure}}::h736d216e74748044
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at /home/yamakaky/dev/rust/rust/src/libstd/panicking.rs:355
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4: 0x558ddf66743c - std::panicking::default_hook::h16baff397e46ea10
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at /home/yamakaky/dev/rust/rust/src/libstd/panicking.rs:371
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5: 0x558ddf6682bc - std::panicking::rust_panic_with_hook::h6d5a9bb4eca42c80
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at /home/yamakaky/dev/rust/rust/src/libstd/panicking.rs:559
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6: 0x558ddf64ea93 - std::panicking::begin_panic::h17dc549df2f10b99
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at /home/yamakaky/dev/rust/rust/src/libstd/panicking.rs:521
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7: 0x558ddf64ec42 - t::diverges::he6bc43fc925905f5
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at /tmp/p/t.rs:2
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8: 0x558ddf64ec5a - t::main::h0ffc20356b8a69c0
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at /tmp/p/t.rs:6
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9: 0x558ddf6687f5 - core::ops::FnOnce::call_once::hce41f19c0db56f93
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10: 0x558ddf667cde - std::panicking::try::do_call::hd4c8c97efb4291df
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at /home/yamakaky/dev/rust/rust/src/libstd/panicking.rs:464
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11: 0x558ddf698d77 - __rust_try
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12: 0x558ddf698c57 - __rust_maybe_catch_panic
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at /home/yamakaky/dev/rust/rust/src/libpanic_unwind/lib.rs:98
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13: 0x558ddf667adb - std::panicking::try::h2c56ed2a59ec1d12
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at /home/yamakaky/dev/rust/rust/src/libstd/panicking.rs:440
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14: 0x558ddf66cc9a - std::panic::catch_unwind::h390834e0251cc9af
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at /home/yamakaky/dev/rust/rust/src/libstd/panic.rs:361
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15: 0x558ddf6809ee - std::rt::lang_start::hb73087428e233982
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at /home/yamakaky/dev/rust/rust/src/libstd/rt.rs:57
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16: 0x558ddf64ec92 - main
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17: 0x7fecb869e290 - __libc_start_main
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18: 0x558ddf64e8b9 - _start
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19: 0x0 - <unknown>
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1: 0x55c39a23372c - std::sys::imp::backtrace::tracing::imp::write::hf33ae72d0baa11ed
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at /buildslave/rust-buildbot/slave/stable-dist-rustc-linux/build/src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:42
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2: 0x55c39a23571e - std::panicking::default_hook::{{closure}}::h59672b733cc6a455
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at /buildslave/rust-buildbot/slave/stable-dist-rustc-linux/build/src/libstd/panicking.rs:351
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3: 0x55c39a235324 - std::panicking::default_hook::h1670459d2f3f8843
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at /buildslave/rust-buildbot/slave/stable-dist-rustc-linux/build/src/libstd/panicking.rs:367
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4: 0x55c39a235afb - std::panicking::rust_panic_with_hook::hcf0ddb069e7beee7
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at /buildslave/rust-buildbot/slave/stable-dist-rustc-linux/build/src/libstd/panicking.rs:555
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5: 0x55c39a22e866 - std::panicking::begin_panic::heb433e9aa28a7408
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6: 0x55c39a22e9bf - foo::main::hd216d4a160fcce19
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7: 0x55c39a23d44a - __rust_maybe_catch_panic
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at /buildslave/rust-buildbot/slave/stable-dist-rustc-linux/build/src/libpanic_unwind/lib.rs:98
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8: 0x55c39a236006 - std::rt::lang_start::hd7c880a37a646e81
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at /buildslave/rust-buildbot/slave/stable-dist-rustc-linux/build/src/libstd/panicking.rs:436
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at /buildslave/rust-buildbot/slave/stable-dist-rustc-linux/build/src/libstd/panic.rs:361
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at /buildslave/rust-buildbot/slave/stable-dist-rustc-linux/build/src/libstd/rt.rs:57
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9: 0x55c39a22e9e9 - main
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10: 0x7f5e5ed3382f - __libc_start_main
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11: 0x55c39a22e6b8 - _start
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12: 0x0 - <unknown>
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```
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is now instead
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```text
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thread 'main' panicked at 'explicit panic', t.rs:2
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Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
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thread 'main' panicked at 'explicit panic', foo.rs:2
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stack backtrace:
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0: t::fail
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at ./t.rs:2
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1: t::main::{{closure}}
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at ./t.rs:6
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2: t::main
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at ./t.rs:7
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0: std::sys::imp::backtrace::tracing::imp::unwind_backtrace
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at /checkout/src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
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1: std::sys_common::backtrace::_print
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at /checkout/src/libstd/sys_common/backtrace.rs:71
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2: std::panicking::default_hook::{{closure}}
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at /checkout/src/libstd/sys_common/backtrace.rs:60
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at /checkout/src/libstd/panicking.rs:355
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3: std::panicking::default_hook
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at /checkout/src/libstd/panicking.rs:371
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4: std::panicking::rust_panic_with_hook
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at /checkout/src/libstd/panicking.rs:549
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5: std::panicking::begin_panic
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6: foo::main
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7: __rust_maybe_catch_panic
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at /checkout/src/libpanic_unwind/lib.rs:98
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8: std::rt::lang_start
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at /checkout/src/libstd/panicking.rs:433
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at /checkout/src/libstd/panic.rs:361
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at /checkout/src/libstd/rt.rs:57
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9: main
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10: __libc_start_main
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11: _start
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```
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By default. As the message says, you can set an environment variable to get the full
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backtrace.
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backtrace. We may be able to do more cleanup in the future; see [this bug](https://github.com/rust-lang/rust/pull/40264) for more.
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See the [detailed release notes][notes] for more.
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#### Cargo features
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Other than the previous mentioned `build.rs` changes, Cargo has a few new improvements.
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Other than the previously mentioned `build.rs` changes, Cargo has a few new improvements.
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[`cargo check --all`](https://github.com/rust-lang/cargo/pull/3731) and
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[`cargo run --package`](https://github.com/rust-lang/cargo/pull/3691) are two missing
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flags that are now supported.
@@ -348,4 +349,4 @@ See the [detailed release notes][notes] for more.
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### Contributors to 1.17.0
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Many people came together to create Rust 1.17. We couldn't have done it without
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all of you. [Thanks!](https://thanks.rust-lang.org/rust/1.17.0)
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all of you. [Thanks!](https://thanks.rust-lang.org/rust/1.17.0)

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