Bump to 1.20.0 and update stage0 compiler

[alexcrichton]

Betas are hot off the bots, let's get them while they're fresh.

[rust-highfive]

r? @BurntSushi

(rust_highfive has picked a reviewer for you, use r? to override)

[Mark-Simulacrum]

[00:03:22] tidy error: The Unstable Book has a 'library feature' section 'question_mark_carrier' which doesn't correspond to an unstable library feature

[BurntSushi]

@alexcrichton Could you find someone else to review this PR? I'm so unfamiliar with this code that I don't even know who to hand it off too. :P

[Mark-Simulacrum]

r=me with the tidy error fixed

[alexcrichton]

@bors: r=Mark-Simulacrum

[bors]

📌 Commit 7d632f7 has been approved by Mark-Simulacrum

[aidanhs]

[00:35:31] '/checkout/src/doc/unstable-book/src/library-features/question-mark-carrier.md' referenced from SUMMARY.md does not exist.

@bors r-

[alexcrichton]

@bors: r=Mark-Simulacrum

[bors]

📌 Commit 61bab28 has been approved by Mark-Simulacrum

[bors]

⌛ Testing commit 61bab28 with merge ecd53d7...

[bors]

💔 Test failed - status-travis

[Mark-Simulacrum]

I assume something with setup went wrong, so not retrying.

[00:00:29] error: failed to run `rustc` to learn about target-specific information
[00:00:29] 
[00:00:29] To learn more, run the command again with --verbose.
[00:00:29] failed to run: /checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo build --manifest-path /checkout/src/bootstrap/Cargo.toml --locked
[00:00:29] Build completed unsuccessfully in 0:00:27
[00:00:29] Makefile:76: recipe for target 'prepare' failed

[alexcrichton]

@bors: r=Mark-Simulacrum

[bors]

📌 Commit 8a90950 has been approved by Mark-Simulacrum

[bors]

⌛ Testing commit 8a90950 with merge 8698196...

[bors]

💔 Test failed - status-travis

[Mark-Simulacrum]

On fuchsia:

[00:22:10] �[1m�[31merror[E0460]�(B�[m�[1m: found possibly newer version of crate `std` which `backtrace` depends on�(B�[m

[00:22:10]    �(B�[m�[1m�[34m--> �(B�[m/cargo/registry/src/github.com-1ecc6299db9ec823/error-chain-0.10.0/src/lib.rs:369:1�(B�[m

[00:22:10]     �(B�[m�[1m�[34m|�(B�[m

[00:22:10] �[1m�[34m369�(B�[m �(B�[m�[1m�[34m| �(B�[mextern crate backtrace;�(B�[m

[00:22:10]     �(B�[m�[1m�[34m| �(B�[m�[1m�[31m^^^^^^^^^^^^^^^^^^^^^^^�(B�[m

[00:22:10]     �(B�[m�[1m�[34m|�(B�[m

[00:22:10]     �(B�[m�[1m�[34m= �(B�[m�[1mnote�(B�[m: perhaps that crate needs to be recompiled?�(B�[m

[00:22:10]     �(B�[m�[1m�[34m= �(B�[m�[1mnote�(B�[m: crate `std` path #1: /checkout/obj/build/x86_64-unknown-linux-gnu/stage0-sysroot/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-35ad9950c7e5074b.rlib�(B�[m

[00:22:10]     �(B�[m�[1m�[34m= �(B�[m�[1mnote�(B�[m: crate `std` path #2: /checkout/obj/build/x86_64-unknown-linux-gnu/stage0-sysroot/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-35ad9950c7e5074b.so�(B�[m

[00:22:10]     �(B�[m�[1m�[34m= �(B�[m�[1mnote�(B�[m: crate `backtrace` path #1: /checkout/obj/build/x86_64-unknown-linux-gnu/stage0-tools/x86_64-unknown-linux-gnu/release/deps/libbacktrace-93e12210233f2ebd.rlib�(B�[m

[00:22:10] 

[00:22:10] �[1m�[31merror�(B�[m�[1m: aborting due to previous error(s)�(B�[m

[alexcrichton]

@bors: retry

Urgh I can't reproduce locally after many attempts. Here's to hoping the next failure is more illuminating.

[bors]

⌛ Testing commit 8a90950 with merge bfc99aa...

[bors]

💔 Test failed - status-appveyor

[bors]

💡 This pull request was already approved, no need to approve it again.

• This pull request previously failed. You should add more commits to fix the bug, or use retry to trigger a build again.

[bors]

📌 Commit 0b44292 has been approved by Mark-Simulacrum

[alexcrichton]

@bors: r=Mark-Simulacrum

[bors]

📌 Commit ef0e847 has been approved by Mark-Simulacrum

[bors]

⌛ Testing commit ef0e847c0655d05b340b9cfa28ab60414803fc80 with merge 889e69854b06887b92552c9353c40bc45d2e13ea...

[bors]

💔 Test failed - status-appveyor

[Mark-Simulacrum]

[00:59:25] make: *** internal error: invalid --jobserver-auth string '__rust_jobserver_semaphore_1341763882'.  Stop.

[alexcrichton]

@bors: r=Mark-Simulacrum

[bors]

📌 Commit 85b6768 has been approved by Mark-Simulacrum

[bors]

⌛ Testing commit 85b6768d3f27a0b71e488390c5ce6e39af9533bf with merge 8e82f2576b9b980394ac76d574137de7a3bc9162...

[bors]

💔 Test failed - status-appveyor

[Mark-Simulacrum]

[00:55:11] running: "make" "-f" "win32/Makefile.gcc" "install" "prefix=/C/projects/rust/build/x86_64-pc-windows-gnu/stage2-tools/x86_
64-pc-windows-gnu/release/build/libz-sys-ee597c11ceb65fc3/out" "IMPLIB=" "INCLUDE_PATH=/C/projects/rust/build/x86_64-pc-windows-gnu/s
tage2-tools/x86_64-pc-windows-gnu/release/build/libz-sys-ee597c11ceb65fc3/out/include" "LIBRARY_PATH=/C/projects/rust/build/x86_64-pc
-windows-gnu/stage2-tools/x86_64-pc-windows-gnu/release/build/libz-sys-ee597c11ceb65fc3/out/lib" "BINARY_PATH=/C/projects/rust/build/
x86_64-pc-windows-gnu/stage2-tools/x86_64-pc-windows-gnu/release/build/libz-sys-ee597c11ceb65fc3/out/bin"
[00:55:11]
[00:55:11]
[00:55:11] command did not execute successfully, got: exit code: 2
[00:55:11]
[00:55:11]
[00:55:11]
[00:55:11] --- stderr
[00:55:11] make: *** internal error: invalid --jobserver-auth string '__rust_jobserver_semaphore_1394453852'.  Stop.
[00:55:11]
[00:55:11] Build failed, waiting for other jobs to finish...
[00:55:13] error: build failed
[00:55:13]
[00:55:13]
[00:55:13] command did not execute successfully: "C:\\projects\\rust\\build\\x86_64-pc-windows-gnu\\stage0/bin\\cargo.exe" "build" "-j" "2" "--target" "x86_64-pc-windows-gnu" "--release" "--locked" "--color" "always" "--manifest-path" "C:\\projects\\rust\\src/tools\\rls\\Cargo.toml"
[00:55:13] expected success, got: exit code: 101

[alexcrichton]

When one fix isn't enough then you should just try, try again

[alexcrichton]

@bors: r=Mark-Simulacrum

[bors]

📌 Commit be7ebdd has been approved by Mark-Simulacrum

[bors]

⌛ Testing commit be7ebdd with merge 753fee4...

[bors]

☀️ Test successful - status-appveyor, status-travis
Approved by: Mark-Simulacrum
Pushing 753fee4 to master...