[INFO] cloning repository https://github.com/ruscur/swagladder
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ruscur/swagladder" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fruscur%2Fswagladder", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fruscur%2Fswagladder'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bcfc3f7a832337e805998e3d8911c3718b2d8b9e
[INFO] checking ruscur/swagladder against master#6526e5c772f2da07db745c94ca6bb0a591a39ba4 for pr-80920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fruscur%2Fswagladder" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ruscur/swagladder on toolchain 6526e5c772f2da07db745c94ca6bb0a591a39ba4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ruscur/swagladder
[INFO] finished tweaking git repo https://github.com/ruscur/swagladder
[INFO] tweaked toml for git repo https://github.com/ruscur/swagladder written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/ruscur/swagladder already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ffcfcb8ced9879a9d2bba7a5c43177e8932ed83be194f0fc7f0fd2ab12241222
[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" "ffcfcb8ced9879a9d2bba7a5c43177e8932ed83be194f0fc7f0fd2ab12241222", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ffcfcb8ced9879a9d2bba7a5c43177e8932ed83be194f0fc7f0fd2ab12241222", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ffcfcb8ced9879a9d2bba7a5c43177e8932ed83be194f0fc7f0fd2ab12241222", kill_on_drop: false }`
[INFO] [stdout] ffcfcb8ced9879a9d2bba7a5c43177e8932ed83be194f0fc7f0fd2ab12241222
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 8be4348e744270b8e3e8ea02c2447f3756895cfb25ff3d0fcd498b87a8a8dac3
[INFO] running `Command { std: "docker" "start" "-a" "8be4348e744270b8e3e8ea02c2447f3756895cfb25ff3d0fcd498b87a8a8dac3", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.20
[INFO] [stderr]     Checking matches v0.1.4
[INFO] [stderr]    Compiling winapi v0.2.8
[INFO] [stderr]    Compiling cfg-if v0.1.0
[INFO] [stderr]     Checking typeable v0.1.2
[INFO] [stderr]    Compiling rustc-demangle v0.1.3
[INFO] [stderr]     Checking traitobject v0.1.0
[INFO] [stderr]     Checking traitobject v0.0.1
[INFO] [stderr]    Compiling toml v0.2.1
[INFO] [stderr]     Checking siphasher v0.2.1
[INFO] [stderr]    Compiling redis v0.7.1
[INFO] [stderr]     Checking itoa v0.1.1
[INFO] [stderr]     Checking sha1 v0.2.0
[INFO] [stderr]     Checking buf_redux v0.3.0
[INFO] [stderr]     Checking quick-error v1.1.0
[INFO] [stderr]     Checking pest v0.3.3
[INFO] [stderr]     Checking serde v0.7.15
[INFO] [stderr]     Checking route-recognizer v0.1.11
[INFO] [stderr]    Compiling dbghelp-sys v0.2.0
[INFO] [stderr]     Checking mime v0.2.2
[INFO] [stderr]     Checking conduit-mime-types v0.7.3
[INFO] [stderr]     Checking num-integer v0.1.32
[INFO] [stderr]    Compiling rand v0.3.15
[INFO] [stderr]     Checking num-complex v0.1.35
[INFO] [stderr]     Checking r2d2 v0.7.1
[INFO] [stderr]     Checking unicode-bidi v0.2.4
[INFO] [stderr]    Compiling unicase v1.4.0
[INFO] [stderr]    Compiling hyper v0.10.3
[INFO] [stderr]     Checking unsafe-any v0.4.1
[INFO] [stderr]     Checking error v0.1.9
[INFO] [stderr]     Checking serde_json v0.8.6
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.5
[INFO] [stderr]     Checking num-iter v0.1.32
[INFO] [stderr]     Checking walkdir v0.1.8
[INFO] [stderr]     Checking typemap v0.3.3
[INFO] [stderr]     Checking time v0.1.36
[INFO] [stderr]     Checking num_cpus v1.2.1
[INFO] [stderr]     Checking thread-id v3.0.0
[INFO] [stderr]     Checking memchr v1.0.1
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking idna v0.1.0
[INFO] [stderr]    Compiling backtrace v0.3.0
[INFO] [stderr]     Checking plugin v0.2.6
[INFO] [stderr]     Checking thread_local v0.3.2
[INFO] [stderr]     Checking aho-corasick v0.6.1
[INFO] [stderr]    Compiling phf_shared v0.7.21
[INFO] [stderr]    Compiling phf_generator v0.7.21
[INFO] [stderr]     Checking regex v0.2.1
[INFO] [stderr]     Checking phf v0.7.21
[INFO] [stderr]     Checking error-chain v0.7.2
[INFO] [stderr]     Checking num-bigint v0.1.35
[INFO] [stderr]     Checking tempdir v0.3.5
[INFO] [stderr]    Compiling phf_codegen v0.7.21
[INFO] [stderr]    Compiling metadeps v1.1.1
[INFO] [stderr]    Compiling mime_guess v1.8.1
[INFO] [stderr]     Checking url v1.4.0
[INFO] [stderr]    Compiling openssl-sys v0.9.6
[INFO] [stderr]     Checking num-rational v0.1.35
[INFO] [stderr]     Checking num v0.1.36
[INFO] [stderr]     Checking chrono v0.2.25
[INFO] [stdout] error[E0713]: borrow may still be in use when destructor runs
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/url-1.4.0/src/form_urlencoded.rs:246:40
[INFO] [stdout]     |
[INFO] [stdout] 244 | impl<'a> Target for ::UrlQuery<'a> {
[INFO] [stdout]     |      -- lifetime `'a` defined here
[INFO] [stdout] 245 |     fn as_mut_string(&mut self) -> &mut String { &mut self.url.serialization }
[INFO] [stdout] 246 |     fn finish(self) -> &'a mut ::Url { self.url }
[INFO] [stdout]     |                                        ^^^^^^^^ - here, drop of `self` needs exclusive access to `*self.url`, because the type `UrlQuery<'_>` implements the `Drop` trait
[INFO] [stdout]     |                                        |
[INFO] [stdout]     |                                        returning this value requires that `*self.url` is borrowed for `'a`
[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 E0713`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `url`
[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] [stdout] error: linking with `cc` failed: exit code: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-Wl,--eh-frame-hdr" "-L" "/opt/rustwide/rustup-home/toolchains/6526e5c772f2da07db745c94ca6bb0a591a39ba4/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/rustwide/target/debug/build/openssl-sys-e7fa085bc3829b96/build_script_build-e7fa085bc3829b96.build_script_build.bwgwauib-cgu.0.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-e7fa085bc3829b96/build_script_build-e7fa085bc3829b96.build_script_build.bwgwauib-cgu.1.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-e7fa085bc3829b96/build_script_build-e7fa085bc3829b96.build_script_build.bwgwauib-cgu.10.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-e7fa085bc3829b96/build_script_build-e7fa085bc3829b96.build_script_build.bwgwauib-cgu.11.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-e7fa085bc3829b96/build_script_build-e7fa085bc3829b96.build_script_build.bwgwauib-cgu.12.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-e7fa085bc3829b96/build_script_build-e7fa085bc3829b96.build_script_build.bwgwauib-cgu.13.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-e7fa085bc3829b96/build_script_build-e7fa085bc3829b96.build_script_build.bwgwauib-cgu.14.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-e7fa085bc3829b96/build_script_build-e7fa085bc3829b96.build_script_build.bwgwauib-cgu.15.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-e7fa085bc3829b96/build_script_build-e7fa085bc3829b96.build_script_build.bwgwauib-cgu.2.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-e7fa085bc3829b96/build_script_build-e7fa085bc3829b96.build_script_build.bwgwauib-cgu.3.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-e7fa085bc3829b96/build_script_build-e7fa085bc3829b96.build_script_build.bwgwauib-cgu.4.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-e7fa085bc3829b96/build_script_build-e7fa085bc3829b96.build_script_build.bwgwauib-cgu.5.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-e7fa085bc3829b96/build_script_build-e7fa085bc3829b96.build_script_build.bwgwauib-cgu.6.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-e7fa085bc3829b96/build_script_build-e7fa085bc3829b96.build_script_build.bwgwauib-cgu.7.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-e7fa085bc3829b96/build_script_build-e7fa085bc3829b96.build_script_build.bwgwauib-cgu.8.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-e7fa085bc3829b96/build_script_build-e7fa085bc3829b96.build_script_build.bwgwauib-cgu.9.rcgu.o" "-o" "/opt/rustwide/target/debug/build/openssl-sys-e7fa085bc3829b96/build_script_build-e7fa085bc3829b96" "/opt/rustwide/target/debug/build/openssl-sys-e7fa085bc3829b96/build_script_build-e7fa085bc3829b96.2stpafw6g37ergnt.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/6526e5c772f2da07db745c94ca6bb0a591a39ba4/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/libmetadeps-46264ac8ebcff9c4.rlib" "/opt/rustwide/target/debug/deps/libtoml-c48a0d9ff6677fb1.rlib" "/opt/rustwide/target/debug/deps/libpkg_config-e323493c9f3b283a.rlib" "/opt/rustwide/target/debug/deps/liberror_chain-510c3fe1e0d49a2d.rlib" "/opt/rustwide/target/debug/deps/libbacktrace-f9538756f12139d9.rlib" "/opt/rustwide/target/debug/deps/libbacktrace_sys-8a526f4d331cabdd.rlib" "/opt/rustwide/target/debug/deps/librustc_demangle-98f38dcb11a75b41.rlib" "/opt/rustwide/target/debug/deps/libcfg_if-fbaeb006ad3b6459.rlib" "/opt/rustwide/target/debug/deps/libdbghelp-aa78f5ddb1a76b48.rlib" "/opt/rustwide/target/debug/deps/libwinapi-d7ba1d42122a8dcb.rlib" "/opt/rustwide/target/debug/deps/libkernel32-993ceeac44ac178c.rlib" "/opt/rustwide/target/debug/deps/liblibc-508a9d3ea83be361.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/6526e5c772f2da07db745c94ca6bb0a591a39ba4/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-8ca495943bae7405.rlib" "/opt/rustwide/rustup-home/toolchains/6526e5c772f2da07db745c94ca6bb0a591a39ba4/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-5a0761f1cab850a8.rlib" "/opt/rustwide/rustup-home/toolchains/6526e5c772f2da07db745c94ca6bb0a591a39ba4/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-fe971cf9622d0c47.rlib" "/opt/rustwide/rustup-home/toolchains/6526e5c772f2da07db745c94ca6bb0a591a39ba4/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-9ff49e5df977573d.rlib" "/opt/rustwide/rustup-home/toolchains/6526e5c772f2da07db745c94ca6bb0a591a39ba4/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-323dea4ee1c9a010.rlib" "/opt/rustwide/rustup-home/toolchains/6526e5c772f2da07db745c94ca6bb0a591a39ba4/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-f12d17a047776008.rlib" "/opt/rustwide/rustup-home/toolchains/6526e5c772f2da07db745c94ca6bb0a591a39ba4/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-3d968aa3120f6a27.rlib" "/opt/rustwide/rustup-home/toolchains/6526e5c772f2da07db745c94ca6bb0a591a39ba4/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-22cd238a7814521c.rlib" "/opt/rustwide/rustup-home/toolchains/6526e5c772f2da07db745c94ca6bb0a591a39ba4/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-f2c707309e5edc5c.rlib" "/opt/rustwide/rustup-home/toolchains/6526e5c772f2da07db745c94ca6bb0a591a39ba4/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-6b6b4b2bc151fc5a.rlib" "/opt/rustwide/rustup-home/toolchains/6526e5c772f2da07db745c94ca6bb0a591a39ba4/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-d2357068fc697e01.rlib" "/opt/rustwide/rustup-home/toolchains/6526e5c772f2da07db745c94ca6bb0a591a39ba4/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-d9f2cb19c79e847e.rlib" "/opt/rustwide/rustup-home/toolchains/6526e5c772f2da07db745c94ca6bb0a591a39ba4/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-5efacc5025f9f3d8.rlib" "/opt/rustwide/rustup-home/toolchains/6526e5c772f2da07db745c94ca6bb0a591a39ba4/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-aa547327a7679d28.rlib" "/opt/rustwide/rustup-home/toolchains/6526e5c772f2da07db745c94ca6bb0a591a39ba4/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-90996f4879673567.rlib" "/opt/rustwide/rustup-home/toolchains/6526e5c772f2da07db745c94ca6bb0a591a39ba4/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-9ea09a899c3eda46.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/6526e5c772f2da07db745c94ca6bb0a591a39ba4/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-ea377e9224b11a8a.rlib" "-Wl,-Bdynamic" "-lutil" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc"
[INFO] [stdout]   = note: /usr/bin/ld: /opt/rustwide/target/debug/deps/libbacktrace-f9538756f12139d9.rlib(backtrace-f9538756f12139d9.backtrace.8vlqirdb-cgu.13.rcgu.o): in function `backtrace::symbolize::libbacktrace::init_state::{{closure}}':
[INFO] [stdout]           /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.0/src/symbolize/libbacktrace.rs:156: undefined reference to `backtrace_create_state'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/deps/libbacktrace-f9538756f12139d9.rlib(backtrace-f9538756f12139d9.backtrace.8vlqirdb-cgu.13.rcgu.o): in function `backtrace::symbolize::libbacktrace::resolve':
[INFO] [stdout]           /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.0/src/symbolize/libbacktrace.rs:173: undefined reference to `backtrace_pcinfo'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.0/src/symbolize/libbacktrace.rs:177: undefined reference to `backtrace_syminfo'
[INFO] [stdout]           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: build failed
[INFO] running `Command { std: "docker" "inspect" "8be4348e744270b8e3e8ea02c2447f3756895cfb25ff3d0fcd498b87a8a8dac3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8be4348e744270b8e3e8ea02c2447f3756895cfb25ff3d0fcd498b87a8a8dac3", kill_on_drop: false }`
[INFO] [stdout] 8be4348e744270b8e3e8ea02c2447f3756895cfb25ff3d0fcd498b87a8a8dac3