[INFO] cloning repository https://github.com/SawyerHood/letter-boxed-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/SawyerHood/letter-boxed-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSawyerHood%2Fletter-boxed-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSawyerHood%2Fletter-boxed-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 419b66571e7f801af72084f1d6d37ecbd31e56b3
[INFO] testing SawyerHood/letter-boxed-rust against master#6c20ab744b0f82646d90ce9d25894823abc9c669 for pr-99093
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSawyerHood%2Fletter-boxed-rust" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/SawyerHood/letter-boxed-rust on toolchain 6c20ab744b0f82646d90ce9d25894823abc9c669
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6c20ab744b0f82646d90ce9d25894823abc9c669" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/SawyerHood/letter-boxed-rust
[INFO] finished tweaking git repo https://github.com/SawyerHood/letter-boxed-rust
[INFO] tweaked toml for git repo https://github.com/SawyerHood/letter-boxed-rust written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/SawyerHood/letter-boxed-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6c20ab744b0f82646d90ce9d25894823abc9c669" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:5873ed620acfc3295992aedd9294443d62a478a48ba243bc5e6c4f5abaffa05f" "/opt/rustwide/cargo-home/bin/cargo" "+6c20ab744b0f82646d90ce9d25894823abc9c669" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ddc2944f7ff8ca46d18864674b0a8e4745ae202be9c403d48b72a6ae04c6d779
[INFO] running `Command { std: "docker" "start" "-a" "ddc2944f7ff8ca46d18864674b0a8e4745ae202be9c403d48b72a6ae04c6d779", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ddc2944f7ff8ca46d18864674b0a8e4745ae202be9c403d48b72a6ae04c6d779", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddc2944f7ff8ca46d18864674b0a8e4745ae202be9c403d48b72a6ae04c6d779", kill_on_drop: false }`
[INFO] [stdout] ddc2944f7ff8ca46d18864674b0a8e4745ae202be9c403d48b72a6ae04c6d779
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5873ed620acfc3295992aedd9294443d62a478a48ba243bc5e6c4f5abaffa05f" "/opt/rustwide/cargo-home/bin/cargo" "+6c20ab744b0f82646d90ce9d25894823abc9c669" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b919aafbf42c67c4f44922ce40d3fa0580e976f6ddf03bece67b733a16e93c96
[INFO] running `Command { std: "docker" "start" "-a" "b919aafbf42c67c4f44922ce40d3fa0580e976f6ddf03bece67b733a16e93c96", kill_on_drop: false }`
[INFO] [stderr]    Compiling arrayvec v0.4.10
[INFO] [stderr]    Compiling libc v0.2.50
[INFO] [stderr]    Compiling cfg-if v0.1.7
[INFO] [stderr]    Compiling nodrop v0.1.13
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling memoffset v0.2.1
[INFO] [stderr]    Compiling scopeguard v0.3.3
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling rayon v1.0.3
[INFO] [stderr]    Compiling either v1.5.1
[INFO] [stderr]    Compiling crossbeam-utils v0.2.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling num_cpus v1.10.0
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling letter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.52s
[INFO] running `Command { std: "docker" "inspect" "b919aafbf42c67c4f44922ce40d3fa0580e976f6ddf03bece67b733a16e93c96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b919aafbf42c67c4f44922ce40d3fa0580e976f6ddf03bece67b733a16e93c96", kill_on_drop: false }`
[INFO] [stdout] b919aafbf42c67c4f44922ce40d3fa0580e976f6ddf03bece67b733a16e93c96
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5873ed620acfc3295992aedd9294443d62a478a48ba243bc5e6c4f5abaffa05f" "/opt/rustwide/cargo-home/bin/cargo" "+6c20ab744b0f82646d90ce9d25894823abc9c669" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 514073cb96f90a181c71992645ec9e3c56e88bcf41618d4bee1b3cc9854be739
[INFO] running `Command { std: "docker" "start" "-a" "514073cb96f90a181c71992645ec9e3c56e88bcf41618d4bee1b3cc9854be739", kill_on_drop: false }`
[INFO] [stderr]    Compiling letter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-m64" "/tmp/rustchLDbK7/symbols.o" "/opt/rustwide/target/debug/deps/letter-142acb7d5947cd92.letter.1cd08e56-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/letter-142acb7d5947cd92.letter.1cd08e56-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/letter-142acb7d5947cd92.letter.1cd08e56-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/letter-142acb7d5947cd92.letter.1cd08e56-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/letter-142acb7d5947cd92.letter.1cd08e56-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/letter-142acb7d5947cd92.1zb7fnkqf5esstfp.rcgu.o" "-Wl,--as-needed" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/6c20ab744b0f82646d90ce9d25894823abc9c669/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/rustup-home/toolchains/6c20ab744b0f82646d90ce9d25894823abc9c669/lib/rustlib/x86_64-unknown-linux-gnu/lib/libtest-b5a855d2797f517b.rlib" "/opt/rustwide/rustup-home/toolchains/6c20ab744b0f82646d90ce9d25894823abc9c669/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgetopts-05f565374729c24d.rlib" "/opt/rustwide/rustup-home/toolchains/6c20ab744b0f82646d90ce9d25894823abc9c669/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunicode_width-94d68ea3c71a2bff.rlib" "/opt/rustwide/rustup-home/toolchains/6c20ab744b0f82646d90ce9d25894823abc9c669/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_std-b54b1311a8200ca9.rlib" "/opt/rustwide/target/debug/deps/librayon-158f261e135357da.rlib" "/opt/rustwide/target/debug/deps/libeither-88b98c3c03f23a50.rlib" "/opt/rustwide/target/debug/deps/librayon_core-c1de8d18e666172a.rlib" "/opt/rustwide/target/debug/deps/libnum_cpus-25d86b6b76847a82.rlib" "/opt/rustwide/target/debug/deps/liblibc-7689dfde4883d104.rlib" "/opt/rustwide/target/debug/deps/libcrossbeam_deque-34a9b61709795348.rlib" "/opt/rustwide/target/debug/deps/libcrossbeam_epoch-178280346bab987c.rlib" "/opt/rustwide/target/debug/deps/libscopeguard-d1d942d3990dad6b.rlib" "/opt/rustwide/target/debug/deps/libmemoffset-1e2cbff4eafa7f91.rlib" "/opt/rustwide/target/debug/deps/liblazy_static-deaeff8e79132040.rlib" "/opt/rustwide/target/debug/deps/libcrossbeam_utils-2b26a91054697d14.rlib" "/opt/rustwide/target/debug/deps/libcfg_if-4dc86aa381747737.rlib" "/opt/rustwide/target/debug/deps/libarrayvec-6c119dc2daa9bacf.rlib" "/opt/rustwide/target/debug/deps/libnodrop-c00b89b8af4132ba.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/6c20ab744b0f82646d90ce9d25894823abc9c669/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-1aab30bac2090a15.rlib" "/opt/rustwide/rustup-home/toolchains/6c20ab744b0f82646d90ce9d25894823abc9c669/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-9cdaf64f7570f7ff.rlib" "/opt/rustwide/rustup-home/toolchains/6c20ab744b0f82646d90ce9d25894823abc9c669/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-7d64cc870c011631.rlib" "/opt/rustwide/rustup-home/toolchains/6c20ab744b0f82646d90ce9d25894823abc9c669/lib/rustlib/x86_64-unknown-linux-gnu/lib/libmemchr-a0a88b78deed3a16.rlib" "/opt/rustwide/rustup-home/toolchains/6c20ab744b0f82646d90ce9d25894823abc9c669/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-315eac6a3174b13c.rlib" "/opt/rustwide/rustup-home/toolchains/6c20ab744b0f82646d90ce9d25894823abc9c669/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-778610d63efc39ce.rlib" "/opt/rustwide/rustup-home/toolchains/6c20ab744b0f82646d90ce9d25894823abc9c669/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-11737b9eef3e285d.rlib" "/opt/rustwide/rustup-home/toolchains/6c20ab744b0f82646d90ce9d25894823abc9c669/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd_detect-8165420a20fe4548.rlib" "/opt/rustwide/rustup-home/toolchains/6c20ab744b0f82646d90ce9d25894823abc9c669/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-db4c499f2074199d.rlib" "/opt/rustwide/rustup-home/toolchains/6c20ab744b0f82646d90ce9d25894823abc9c669/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-1a230f9a19aa3698.rlib" "/opt/rustwide/rustup-home/toolchains/6c20ab744b0f82646d90ce9d25894823abc9c669/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-605ec4e87a2c9d10.rlib" "/opt/rustwide/rustup-home/toolchains/6c20ab744b0f82646d90ce9d25894823abc9c669/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-5f171797b6654b84.rlib" "/opt/rustwide/rustup-home/toolchains/6c20ab744b0f82646d90ce9d25894823abc9c669/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-990f92fdff457c3a.rlib" "/opt/rustwide/rustup-home/toolchains/6c20ab744b0f82646d90ce9d25894823abc9c669/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-66ccc5a2fa17d637.rlib" "/opt/rustwide/rustup-home/toolchains/6c20ab744b0f82646d90ce9d25894823abc9c669/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-9dba3f083c9eb142.rlib" "/opt/rustwide/rustup-home/toolchains/6c20ab744b0f82646d90ce9d25894823abc9c669/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-dfc71beee59013ce.rlib" "/opt/rustwide/rustup-home/toolchains/6c20ab744b0f82646d90ce9d25894823abc9c669/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-522518611024dce5.rlib" "/opt/rustwide/rustup-home/toolchains/6c20ab744b0f82646d90ce9d25894823abc9c669/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-05898138a596088a.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/6c20ab744b0f82646d90ce9d25894823abc9c669/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-6f7f4877ee9c613e.rlib" "-Wl,-Bdynamic" "-lutil" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/6c20ab744b0f82646d90ce9d25894823abc9c669/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/letter-142acb7d5947cd92" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro,-znow" "-nodefaultlibs"
[INFO] [stdout]   = note: collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `letter` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "514073cb96f90a181c71992645ec9e3c56e88bcf41618d4bee1b3cc9854be739", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "514073cb96f90a181c71992645ec9e3c56e88bcf41618d4bee1b3cc9854be739", kill_on_drop: false }`
[INFO] [stdout] 514073cb96f90a181c71992645ec9e3c56e88bcf41618d4bee1b3cc9854be739