[INFO] cloning repository https://github.com/matklad/compilers
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/matklad/compilers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatklad%2Fcompilers", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatklad%2Fcompilers'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 72d3c92c8f726c582ddf6ef8ce677559ec320035
[INFO] checking matklad/compilers against 1.55.0 for beta-1.56-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatklad%2Fcompilers" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/matklad/compilers on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/matklad/compilers
[INFO] finished tweaking git repo https://github.com/matklad/compilers
[INFO] tweaked toml for git repo https://github.com/matklad/compilers written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/matklad/compilers already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 953b74aea889d102bc25e93a154796d001655f8f86f3ecd16a4749c257d79cc5
[INFO] running `Command { std: "docker" "start" "-a" "953b74aea889d102bc25e93a154796d001655f8f86f3ecd16a4749c257d79cc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "953b74aea889d102bc25e93a154796d001655f8f86f3ecd16a4749c257d79cc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "953b74aea889d102bc25e93a154796d001655f8f86f3ecd16a4749c257d79cc5", kill_on_drop: false }`
[INFO] [stdout] 953b74aea889d102bc25e93a154796d001655f8f86f3ecd16a4749c257d79cc5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a88007eb83ac1940272715a65ff3b695c6e835e7db65fdb8feb8c5fb27407593
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a88007eb83ac1940272715a65ff3b695c6e835e7db65fdb8feb8c5fb27407593", kill_on_drop: false }`
[INFO] [stderr]     Checking data_structures v0.1.0 (/opt/rustwide/workdir/data_structures)
[INFO] [stderr]    Compiling runtime v0.1.0 (/opt/rustwide/workdir/pyt/runtime)
[INFO] [stderr]     Checking syntax v0.1.0 (/opt/rustwide/workdir/syntax)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> syntax/src/token.rs:53:22
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub type Tokenizer = Fn(&mut TokenBuilder);
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut TokenBuilder)`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> syntax/src/token.rs:99:60
[INFO] [stdout]    |
[INFO] [stdout] 99 |     pub fn try_pred_token(&mut self, tokens: &[(NodeType, &Fn(char) -> bool)]) -> bool {
[INFO] [stdout]    |                                                            ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(char) -> bool`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> syntax/src/rst/mod.rs:175:19
[INFO] [stdout]     |
[INFO] [stdout] 175 | pub type Parser = Fn(&mut RstBuilder);
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut RstBuilder)`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> syntax/src/token.rs:53:22
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub type Tokenizer = Fn(&mut TokenBuilder);
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut TokenBuilder)`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> syntax/src/token.rs:99:60
[INFO] [stdout]    |
[INFO] [stdout] 99 |     pub fn try_pred_token(&mut self, tokens: &[(NodeType, &Fn(char) -> bool)]) -> bool {
[INFO] [stdout]    |                                                            ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(char) -> bool`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> syntax/src/rst/mod.rs:175:19
[INFO] [stdout]     |
[INFO] [stdout] 175 | pub type Parser = Fn(&mut RstBuilder);
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut RstBuilder)`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking frontend v0.1.0 (/opt/rustwide/workdir/pyt/frontend)
[INFO] [stderr]     Checking super_tiny_compiler v0.1.0 (/opt/rustwide/workdir/super_tiny_compiler)
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> super_tiny_compiler/src/rst.rs:1:14
[INFO] [stdout]   |
[INFO] [stdout] 1 | use syntax::{self, RstBuilder, TokenBuilder, NodeType, WHITESPACE};
[INFO] [stdout]   |              ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> super_tiny_compiler/src/rst.rs:15:36
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let pred_tokens: &[(NodeType, &Fn(char) -> bool)] = &[
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(char) -> bool`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> super_tiny_compiler/src/rst.rs:15:36
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let pred_tokens: &[(NodeType, &Fn(char) -> bool)] = &[
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(char) -> bool`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> pyt/frontend/src/tokenizer.rs:11:36
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let pred_tokens: &[(NodeType, &Fn(char) -> bool)] = &[
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(char) -> bool`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `tokenize`
[INFO] [stdout]  --> pyt/frontend/src/tokenizer.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn tokenize(builder: &mut TokenBuilder) {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parse`
[INFO] [stdout]  --> pyt/frontend/src/parser.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn parse(builder: &mut RstBuilder) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parse_stmt`
[INFO] [stdout]   --> pyt/frontend/src/parser.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn parse_stmt(builder: &mut RstBuilder) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parse_expr`
[INFO] [stdout]   --> pyt/frontend/src/parser.rs:36:4
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn parse_expr(builder: &mut RstBuilder) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> pyt/frontend/src/tokenizer.rs:11:36
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let pred_tokens: &[(NodeType, &Fn(char) -> bool)] = &[
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(char) -> bool`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `tokenize`
[INFO] [stdout]  --> pyt/frontend/src/tokenizer.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn tokenize(builder: &mut TokenBuilder) {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parse`
[INFO] [stdout]  --> pyt/frontend/src/parser.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn parse(builder: &mut RstBuilder) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parse_stmt`
[INFO] [stdout]   --> pyt/frontend/src/parser.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn parse_stmt(builder: &mut RstBuilder) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parse_expr`
[INFO] [stdout]   --> pyt/frontend/src/parser.rs:36:4
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn parse_expr(builder: &mut RstBuilder) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_left`: superseded by `trim_start`
[INFO] [stdout]   --> super_tiny_compiler/src/codegen.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | "#.trim_left();
[INFO] [stdout]    |    ^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_start`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking pyt v0.1.0 (/opt/rustwide/workdir/pyt)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> pyt/runtime/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(lang_items)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: language item required, but not found: `eh_personality`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: `#[panic_handler]` function required, but not found
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> pyt/runtime/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(lang_items)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `runtime` due to 4 previous errors
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "a88007eb83ac1940272715a65ff3b695c6e835e7db65fdb8feb8c5fb27407593", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a88007eb83ac1940272715a65ff3b695c6e835e7db65fdb8feb8c5fb27407593", kill_on_drop: false }`
[INFO] [stdout] a88007eb83ac1940272715a65ff3b695c6e835e7db65fdb8feb8c5fb27407593
