[INFO] cloning repository https://github.com/stevefan1999-personal/peg_no_alloc_demo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/stevefan1999-personal/peg_no_alloc_demo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstevefan1999-personal%2Fpeg_no_alloc_demo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstevefan1999-personal%2Fpeg_no_alloc_demo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 74d9fe983ca7c4bb16a8c77b30959bf7d296801c
[INFO] testing stevefan1999-personal/peg_no_alloc_demo against try#b83b707f97d809763b7861afa7638871f3339a33 for pr-145838-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstevefan1999-personal%2Fpeg_no_alloc_demo" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/stevefan1999-personal/peg_no_alloc_demo
[INFO] finished tweaking git repo https://github.com/stevefan1999-personal/peg_no_alloc_demo
[INFO] tweaked toml for git repo https://github.com/stevefan1999-personal/peg_no_alloc_demo written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/stevefan1999-personal/peg_no_alloc_demo on toolchain b83b707f97d809763b7861afa7638871f3339a33
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/stevefan1999-personal/peg_no_alloc_demo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5ee05275489f09b68775c10dca7dbd067ef8018373dc9ea9016f6cbda38cc7fe
[INFO] running `Command { std: "docker" "start" "-a" "5ee05275489f09b68775c10dca7dbd067ef8018373dc9ea9016f6cbda38cc7fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5ee05275489f09b68775c10dca7dbd067ef8018373dc9ea9016f6cbda38cc7fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ee05275489f09b68775c10dca7dbd067ef8018373dc9ea9016f6cbda38cc7fe", kill_on_drop: false }`
[INFO] [stdout] 5ee05275489f09b68775c10dca7dbd067ef8018373dc9ea9016f6cbda38cc7fe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d1c0b700733cf2ff1a6a4ffce94e4b20bca88c0da6ac73c99703733ba8e37d28
[INFO] running `Command { std: "docker" "start" "-a" "d1c0b700733cf2ff1a6a4ffce94e4b20bca88c0da6ac73c99703733ba8e37d28", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling smallnum v0.4.1
[INFO] [stderr]    Compiling libc v0.2.141
[INFO] [stderr]    Compiling micromath v2.0.0
[INFO] [stderr]    Compiling arrayvec v0.7.2
[INFO] [stderr]    Compiling tinyvec v1.6.0
[INFO] [stderr]    Compiling unsize v1.1.0
[INFO] [stderr]    Compiling peg-runtime v0.8.1 (https://github.com/stevefan1999-personal/rust-peg?branch=patch-unstable-vectors#a5b344c7)
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.56/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling alloc-traits v0.1.1
[INFO] [stderr]    Compiling vc-ltl v5.0.5
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proc-macro2` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "d1c0b700733cf2ff1a6a4ffce94e4b20bca88c0da6ac73c99703733ba8e37d28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1c0b700733cf2ff1a6a4ffce94e4b20bca88c0da6ac73c99703733ba8e37d28", kill_on_drop: false }`
[INFO] [stdout] d1c0b700733cf2ff1a6a4ffce94e4b20bca88c0da6ac73c99703733ba8e37d28