[INFO] cloning repository https://github.com/danrien/a_new_os
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/danrien/a_new_os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanrien%2Fa_new_os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanrien%2Fa_new_os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 957071326d43d645e845bbef446b8bbe1e337704
[INFO] checking danrien/a_new_os against master#4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5 for pr-81174
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanrien%2Fa_new_os" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/danrien/a_new_os on toolchain 4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/danrien/a_new_os
[INFO] finished tweaking git repo https://github.com/danrien/a_new_os
[INFO] tweaked toml for git repo https://github.com/danrien/a_new_os written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/danrien/a_new_os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f9d8aeb74452f2af1ea857e9ea68da81060d2880239812153cbf1d8bcc3fb83e
[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" "f9d8aeb74452f2af1ea857e9ea68da81060d2880239812153cbf1d8bcc3fb83e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f9d8aeb74452f2af1ea857e9ea68da81060d2880239812153cbf1d8bcc3fb83e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9d8aeb74452f2af1ea857e9ea68da81060d2880239812153cbf1d8bcc3fb83e", kill_on_drop: false }`
[INFO] [stdout] f9d8aeb74452f2af1ea857e9ea68da81060d2880239812153cbf1d8bcc3fb83e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=forbid" "-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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dcba751fe7fe2132b8b79e93d2efb45bbdf9946df885bb27ca26d67d350ac4f2
[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" "dcba751fe7fe2132b8b79e93d2efb45bbdf9946df885bb27ca26d67d350ac4f2", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling proc-macro2 v0.4.24
[INFO] [stderr]     Checking usize_conversions v0.2.0
[INFO] [stderr]     Checking bitflags v1.0.4
[INFO] [stderr]     Checking bit_field v0.9.0
[INFO] [stderr]     Checking os_bootinfo v0.2.1
[INFO] [stderr]     Checking ux v0.1.3
[INFO] [stderr]     Checking zero v0.1.2
[INFO] [stderr]     Checking font8x8 v0.2.4
[INFO] [stderr]     Checking spin v0.4.10
[INFO] [stderr]     Checking volatile v0.2.5
[INFO] [stderr]     Checking xmas-elf v0.6.2
[INFO] [stderr]     Checking array-init v0.0.3
[INFO] [stderr]    Compiling libc v0.2.44
[INFO] [stderr]     Checking lazy_static v1.2.0
[INFO] [stderr]    Compiling getopts v0.2.18
[INFO] [stderr]    Compiling pulldown-cmark v0.0.3
[INFO] [stderr]    Compiling rand v0.4.3
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling skeptic v0.5.0
[INFO] [stderr]    Compiling fixedvec v0.2.3
[INFO] [stderr]    Compiling speculate v0.1.0
[INFO] [stdout] error[E0599]: no method named `is_xid_start` found for type `char` in the current scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/speculate-0.1.0/src/block.rs:164:18
[INFO] [stdout]     |
[INFO] [stdout] 164 |     if !first_ch.is_xid_start() {
[INFO] [stdout]     |                  ^^^^^^^^^^^^ method not found in `char`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout]     = note: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]             `use unicode_xid::UnicodeXID;`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `is_xid_continue` found for type `char` in the current scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/speculate-0.1.0/src/block.rs:167:21
[INFO] [stdout]     |
[INFO] [stdout] 167 |         if first_ch.is_xid_continue() {
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^ method not found in `char`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout]     = note: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]             `use unicode_xid::UnicodeXID;`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `is_xid_continue` found for type `char` in the current scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/speculate-0.1.0/src/block.rs:177:15
[INFO] [stdout]     |
[INFO] [stdout] 177 |         if ch.is_xid_continue() {
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^ method not found in `char`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout]     = note: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]             `use unicode_xid::UnicodeXID;`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `speculate`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "dcba751fe7fe2132b8b79e93d2efb45bbdf9946df885bb27ca26d67d350ac4f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dcba751fe7fe2132b8b79e93d2efb45bbdf9946df885bb27ca26d67d350ac4f2", kill_on_drop: false }`
[INFO] [stdout] dcba751fe7fe2132b8b79e93d2efb45bbdf9946df885bb27ca26d67d350ac4f2