[INFO] fetching crate embd 0.1.5...
[INFO] testing embd-0.1.5 against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_libc_patch_0
[INFO] extracting crate embd 0.1.5 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate embd 0.1.5
[INFO] finished tweaking crates.io crate embd 0.1.5
[INFO] tweaked toml for crates.io crate embd 0.1.5 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate embd 0.1.5 on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate embd 0.1.5 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" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded embd-macros v0.1.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3dab2a140a699608c5f49e0edf3d8fed4f1cccf1f514a53f418527ea0bfda7fe
[INFO] running `Command { std: "docker" "start" "-a" "3dab2a140a699608c5f49e0edf3d8fed4f1cccf1f514a53f418527ea0bfda7fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3dab2a140a699608c5f49e0edf3d8fed4f1cccf1f514a53f418527ea0bfda7fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3dab2a140a699608c5f49e0edf3d8fed4f1cccf1f514a53f418527ea0bfda7fe", kill_on_drop: false }`
[INFO] [stdout] 3dab2a140a699608c5f49e0edf3d8fed4f1cccf1f514a53f418527ea0bfda7fe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] ddcc2a45dfd4d4f617b27b38f33e883bbd2964bc549b688ab2f1cd88fe7fd5f2
[INFO] running `Command { std: "docker" "start" "-a" "ddcc2a45dfd4d4f617b27b38f33e883bbd2964bc549b688ab2f1cd88fe7fd5f2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]    Compiling unicode-ident v1.0.16
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling syn v2.0.98
[INFO] [stderr]    Compiling embd-macros v0.1.4
[INFO] [stdout] error: pass `--cfg procmacro2_semver_exempt` to rustc to compile embd-macros or add this to your `.cargo/config.toml`:
[INFO] [stdout]        
[INFO] [stdout]        [build]
[INFO] [stdout]        rustflags = [ "--cfg", "procmacro2_semver_exempt" ]
[INFO] [stdout]        
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/embd-macros-0.1.4/src/lib.rs:9:1
[INFO] [stdout]    |
[INFO] [stdout] 9  | / compile_error!(
[INFO] [stdout] 10 | |     r#"pass `--cfg procmacro2_semver_exempt` to rustc to compile embd-macros or add this to your `.cargo/config.toml`:
[INFO] [stdout] 11 | |
[INFO] [stdout] 12 | | [build]
[INFO] [stdout] ...  |
[INFO] [stdout] 15 | | "#
[INFO] [stdout] 16 | | );
[INFO] [stdout]    | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `embd-macros` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "ddcc2a45dfd4d4f617b27b38f33e883bbd2964bc549b688ab2f1cd88fe7fd5f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddcc2a45dfd4d4f617b27b38f33e883bbd2964bc549b688ab2f1cd88fe7fd5f2", kill_on_drop: false }`
[INFO] [stdout] ddcc2a45dfd4d4f617b27b38f33e883bbd2964bc549b688ab2f1cd88fe7fd5f2