[INFO] cloning repository https://github.com/oli-obk/rustfest2018_workshop
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/oli-obk/rustfest2018_workshop" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Foli-obk%2Frustfest2018_workshop", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Foli-obk%2Frustfest2018_workshop'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2f672e708ca7ac688e311d43fa9c67461dc77665
[INFO] testing oli-obk/rustfest2018_workshop against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Foli-obk%2Frustfest2018_workshop" "/workspace/builds/worker-64/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-64/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/oli-obk/rustfest2018_workshop on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-64/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/oli-obk/rustfest2018_workshop
[INFO] finished tweaking git repo https://github.com/oli-obk/rustfest2018_workshop
[INFO] tweaked toml for git repo https://github.com/oli-obk/rustfest2018_workshop written to /workspace/builds/worker-64/source/Cargo.toml
[INFO] crate git repo https://github.com/oli-obk/rustfest2018_workshop already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 61176e8d50e7b32e5d3d26fb745bbbbd5d0e125bff9681be71a3989330b0ed23
[INFO] running `Command { std: "docker" "start" "-a" "61176e8d50e7b32e5d3d26fb745bbbbd5d0e125bff9681be71a3989330b0ed23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "61176e8d50e7b32e5d3d26fb745bbbbd5d0e125bff9681be71a3989330b0ed23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61176e8d50e7b32e5d3d26fb745bbbbd5d0e125bff9681be71a3989330b0ed23", kill_on_drop: false }`
[INFO] [stdout] 61176e8d50e7b32e5d3d26fb745bbbbd5d0e125bff9681be71a3989330b0ed23
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7a15e90807c7d96739c8167016e5a937f4b0e649319b1c1ed874aeedea5e0890
[INFO] running `Command { std: "docker" "start" "-a" "7a15e90807c7d96739c8167016e5a937f4b0e649319b1c1ed874aeedea5e0890", kill_on_drop: false }`
[INFO] [stderr]    Compiling if_chain v0.1.3
[INFO] [stderr]    Compiling rustfest2018_workshop v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0462]: found staticlib `rustc` instead of rlib or dylib
[INFO] [stdout]  --> src/main.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | extern crate rustc;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: please recompile that crate using --crate-type lib
[INFO] [stdout]   = note: the following crate versions were found:
[INFO] [stdout]           crate `rustc`: /opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc-beta_rt.asan.a
[INFO] [stdout]           crate `rustc`: /opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc-beta_rt.tsan.a
[INFO] [stdout]           crate `rustc`: /opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc-beta_rt.msan.a
[INFO] [stdout]           crate `rustc`: /opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc-beta_rt.lsan.a
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `rustc_data_structures`
[INFO] [stdout]  --> src/main.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | extern crate rustc_data_structures;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe you need to install the missing components with: `rustup component add rust-src rustc-dev llvm-tools-preview`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `rustc_driver`
[INFO] [stdout]  --> src/main.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | extern crate rustc_driver;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe you need to install the missing components with: `rustup component add rust-src rustc-dev llvm-tools-preview`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `syntax`
[INFO] [stdout]  --> src/main.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | extern crate syntax;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `declare_lint` in this scope
[INFO] [stdout]   --> src/main.rs:24:1
[INFO] [stdout]    |
[INFO] [stdout] 24 | declare_lint! {
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `lint_array` in this scope
[INFO] [stdout]   --> src/main.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |         lint_array!(NO_INT_DIV)
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `declare_lint` in this scope
[INFO] [stdout]   --> src/main.rs:38:1
[INFO] [stdout]    |
[INFO] [stdout] 38 | declare_lint! {
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `lint_array` in this scope
[INFO] [stdout]   --> src/main.rs:70:9
[INFO] [stdout]    |
[INFO] [stdout] 70 |         lint_array!(TRANSMUTE)
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `declare_lint` in this scope
[INFO] [stdout]   --> src/main.rs:86:1
[INFO] [stdout]    |
[INFO] [stdout] 86 | declare_lint! {
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `lint_array` in this scope
[INFO] [stdout]   --> src/main.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |         lint_array!(STATE_MACHINE)
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `ExprKind`
[INFO] [stdout]   --> src/main.rs:47:20
[INFO] [stdout]    |
[INFO] [stdout] 47 |             if let ExprKind::Binary(ref op, _, _) = expr.node;
[INFO] [stdout]    |                    ^^^^^^^^ use of undeclared type `ExprKind`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `BinOpKind`
[INFO] [stdout]   --> src/main.rs:48:16
[INFO] [stdout]    |
[INFO] [stdout] 48 |             if BinOpKind::Div == op.node;
[INFO] [stdout]    |                ^^^^^^^^^ use of undeclared type `BinOpKind`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `ty`
[INFO] [stdout]   --> src/main.rs:52:21
[INFO] [stdout]    |
[INFO] [stdout] 52 |                     ty::Int(_) | ty::Uint(_) => {
[INFO] [stdout]    |                     ^^ use of undeclared crate or module `ty`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `ty`
[INFO] [stdout]   --> src/main.rs:52:34
[INFO] [stdout]    |
[INFO] [stdout] 52 |                     ty::Int(_) | ty::Uint(_) => {
[INFO] [stdout]    |                                  ^^ use of undeclared crate or module `ty`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `mir`
[INFO] [stdout]    --> src/main.rs:115:34
[INFO] [stdout]     |
[INFO] [stdout] 115 |         let mut states: IndexVec<mir::BasicBlock, HashSet<&'static str>> =
[INFO] [stdout]     |                                  ^^^ use of undeclared crate or module `mir`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `IndexVec`
[INFO] [stdout]    --> src/main.rs:116:13
[INFO] [stdout]     |
[INFO] [stdout] 116 |             IndexVec::from_elem(HashSet::new(), mir.basic_blocks());
[INFO] [stdout]     |             ^^^^^^^^ use of undeclared type `IndexVec`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `mir`
[INFO] [stdout]    --> src/main.rs:117:16
[INFO] [stdout]     |
[INFO] [stdout] 117 |         states[mir::START_BLOCK].insert(self.start);
[INFO] [stdout]     |                ^^^ use of undeclared crate or module `mir`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `mir`
[INFO] [stdout]    --> src/main.rs:120:20
[INFO] [stdout]     |
[INFO] [stdout] 120 |             if let mir::TerminatorKind::Call {
[INFO] [stdout]     |                    ^^^ use of undeclared crate or module `mir`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `ty`
[INFO] [stdout]    --> src/main.rs:128:25
[INFO] [stdout]     |
[INFO] [stdout] 128 |                         ty::FnDef(did, _) => cx.tcx.item_name(did) == transition,
[INFO] [stdout]     |                         ^^ use of undeclared crate or module `ty`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `driver`
[INFO] [stdout]    --> src/main.rs:160:28
[INFO] [stdout]     |
[INFO] [stdout] 160 |         let mut compiler = driver::CompileController::basic();
[INFO] [stdout]     |                            ^^^^^^ use of undeclared crate or module `driver`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0405]: cannot find trait `LintPass` in this scope
[INFO] [stdout]   --> src/main.rs:32:6
[INFO] [stdout]    |
[INFO] [stdout] 32 | impl LintPass for Pass {
[INFO] [stdout]    |      ^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `LintArray` in this scope
[INFO] [stdout]   --> src/main.rs:33:28
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn get_lints(&self) -> LintArray {
[INFO] [stdout]    |                            ^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0405]: cannot find trait `LateLintPass` in this scope
[INFO] [stdout]   --> src/main.rs:44:16
[INFO] [stdout]    |
[INFO] [stdout] 44 | impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Pass {
[INFO] [stdout]    |                ^^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `LateContext` in this scope
[INFO] [stdout]   --> src/main.rs:45:35
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr) {
[INFO] [stdout]    |                                   ^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Expr` in this scope
[INFO] [stdout]   --> src/main.rs:45:70
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr) {
[INFO] [stdout]    |                                                                      ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `NO_INT_DIV` in this scope
[INFO] [stdout]   --> src/main.rs:54:29
[INFO] [stdout]    |
[INFO] [stdout] 54 | ...                   NO_INT_DIV,
[INFO] [stdout]    |                       ^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0405]: cannot find trait `LintPass` in this scope
[INFO] [stdout]   --> src/main.rs:68:6
[INFO] [stdout]    |
[INFO] [stdout] 68 | impl LintPass for NoTransmute {
[INFO] [stdout]    |      ^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `LintArray` in this scope
[INFO] [stdout]   --> src/main.rs:69:28
[INFO] [stdout]    |
[INFO] [stdout] 69 |     fn get_lints(&self) -> LintArray {
[INFO] [stdout]    |                            ^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0405]: cannot find trait `EarlyLintPass` in this scope
[INFO] [stdout]   --> src/main.rs:74:6
[INFO] [stdout]    |
[INFO] [stdout] 74 | impl EarlyLintPass for NoTransmute {
[INFO] [stdout]    |      ^^^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `EarlyContext` in this scope
[INFO] [stdout]   --> src/main.rs:75:36
[INFO] [stdout]    |
[INFO] [stdout] 75 |     fn check_ident(&mut self, cx: &EarlyContext, ident: Ident) {
[INFO] [stdout]    |                                    ^^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Ident` in this scope
[INFO] [stdout]   --> src/main.rs:75:57
[INFO] [stdout]    |
[INFO] [stdout] 75 |     fn check_ident(&mut self, cx: &EarlyContext, ident: Ident) {
[INFO] [stdout]    |                                                         ^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `TRANSMUTE` in this scope
[INFO] [stdout]   --> src/main.rs:78:17
[INFO] [stdout]    |
[INFO] [stdout] 78 |                 TRANSMUTE,
[INFO] [stdout]    |                 ^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0405]: cannot find trait `LintPass` in this scope
[INFO] [stdout]   --> src/main.rs:97:6
[INFO] [stdout]    |
[INFO] [stdout] 97 | impl LintPass for StateMachine {
[INFO] [stdout]    |      ^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `LintArray` in this scope
[INFO] [stdout]   --> src/main.rs:98:28
[INFO] [stdout]    |
[INFO] [stdout] 98 |     fn get_lints(&self) -> LintArray {
[INFO] [stdout]    |                            ^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0405]: cannot find trait `LateLintPass` in this scope
[INFO] [stdout]    --> src/main.rs:103:16
[INFO] [stdout]     |
[INFO] [stdout] 103 | impl<'a, 'tcx> LateLintPass<'a, 'tcx> for StateMachine {
[INFO] [stdout]     |                ^^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `LateContext` in this scope
[INFO] [stdout]    --> src/main.rs:106:14
[INFO] [stdout]     |
[INFO] [stdout] 106 |         cx: &LateContext<'a, 'tcx>,
[INFO] [stdout]     |              ^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `FnKind` in this scope
[INFO] [stdout]    --> src/main.rs:107:12
[INFO] [stdout]     |
[INFO] [stdout] 107 |         _: FnKind<'tcx>,
[INFO] [stdout]     |            ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `FnDecl` in this scope
[INFO] [stdout]    --> src/main.rs:108:18
[INFO] [stdout]     |
[INFO] [stdout] 108 |         _: &'tcx FnDecl,
[INFO] [stdout]     |                  ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Body` in this scope
[INFO] [stdout]    --> src/main.rs:109:21
[INFO] [stdout]     |
[INFO] [stdout] 109 |         body: &'tcx Body,
[INFO] [stdout]     |                     ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Span` in this scope
[INFO] [stdout]    --> src/main.rs:110:12
[INFO] [stdout]     |
[INFO] [stdout] 110 |         _: Span,
[INFO] [stdout]     |            ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `NodeId` in this scope
[INFO] [stdout]    --> src/main.rs:111:12
[INFO] [stdout]     |
[INFO] [stdout] 111 |         _: NodeId,
[INFO] [stdout]     |            ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `IndexVec` in this scope
[INFO] [stdout]    --> src/main.rs:115:25
[INFO] [stdout]     |
[INFO] [stdout] 115 |         let mut states: IndexVec<mir::BasicBlock, HashSet<&'static str>> =
[INFO] [stdout]     |                         ^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `STATE_MACHINE` in this scope
[INFO] [stdout]    --> src/main.rs:137:29
[INFO] [stdout]     |
[INFO] [stdout] 137 | ...                   STATE_MACHINE,
[INFO] [stdout]     |                       ^^^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_syntax)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(rustc_private)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 45 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0405, E0412, E0425, E0433, E0463, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0405`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustfest2018_workshop` due to 46 previous errors
[INFO] running `Command { std: "docker" "inspect" "7a15e90807c7d96739c8167016e5a937f4b0e649319b1c1ed874aeedea5e0890", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a15e90807c7d96739c8167016e5a937f4b0e649319b1c1ed874aeedea5e0890", kill_on_drop: false }`
[INFO] [stdout] 7a15e90807c7d96739c8167016e5a937f4b0e649319b1c1ed874aeedea5e0890