[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#d62d3f7fa9a91d933213cc10e20e740608983f64 for pr-77015
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fruscur%2Fswagladder" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ruscur/swagladder on toolchain d62d3f7fa9a91d933213cc10e20e740608983f64
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "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-4/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" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "metadata" "--no-deps" "--format-version=1", 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] a00fb52cad6765dfd6da4ed7ea0a3231251f10441554441d2103a16c5d8ed648
[INFO] running `Command { std: "docker" "start" "-a" "a00fb52cad6765dfd6da4ed7ea0a3231251f10441554441d2103a16c5d8ed648", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a00fb52cad6765dfd6da4ed7ea0a3231251f10441554441d2103a16c5d8ed648", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a00fb52cad6765dfd6da4ed7ea0a3231251f10441554441d2103a16c5d8ed648", kill_on_drop: false }`
[INFO] [stdout] a00fb52cad6765dfd6da4ed7ea0a3231251f10441554441d2103a16c5d8ed648
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b5698032df56f842ff71613c957b280bce6848034940deaeee578e4c68deb2f5
[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" "b5698032df56f842ff71613c957b280bce6848034940deaeee578e4c68deb2f5", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling libc v0.2.20
[INFO] [stderr]    Compiling gcc v0.3.42
[INFO] [stderr]     Checking unicode-normalization v0.1.3
[INFO] [stderr]    Compiling backtrace v0.3.0
[INFO] [stderr]    Compiling winapi v0.2.8
[INFO] [stderr]     Checking lazy_static v0.2.2
[INFO] [stderr]    Compiling cfg-if v0.1.0
[INFO] [stderr]     Checking num-traits v0.1.36
[INFO] [stderr]     Checking traitobject v0.1.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.3
[INFO] [stderr]     Checking typeable v0.1.2
[INFO] [stderr]     Checking language-tags v0.2.2
[INFO] [stderr]    Compiling pkg-config v0.3.9
[INFO] [stderr]    Compiling toml v0.2.1
[INFO] [stderr]    Compiling siphasher v0.2.1
[INFO] [stderr]     Checking modifier v0.1.0
[INFO] [stderr]    Compiling openssl v0.9.6
[INFO] [stderr]     Checking serde v0.8.23
[INFO] [stderr]     Checking antidote v1.0.0
[INFO] [stderr]     Checking regex-syntax v0.4.0
[INFO] [stderr]    Compiling redis v0.7.1
[INFO] [stderr]     Checking itoa v0.1.1
[INFO] [stderr]     Checking dtoa v0.2.2
[INFO] [stderr]     Checking sha1 v0.2.0
[INFO] [stderr]     Checking pest v0.3.3
[INFO] [stderr]     Checking buf_redux v0.3.0
[INFO] [stderr]     Checking quick-error v1.1.0
[INFO] [stderr]     Checking serde v0.7.15
[INFO] [stderr]     Checking route-recognizer v0.1.11
[INFO] [stderr]     Checking unicode-bidi v0.2.4
[INFO] [stderr]     Checking mime v0.2.2
[INFO] [stderr]     Checking time v0.1.36
[INFO] [stderr]     Checking num_cpus v1.2.1
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking conduit-mime-types v0.7.3
[INFO] [stderr]     Checking memchr v1.0.1
[INFO] [stderr]     Checking thread-id v3.0.0
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking unsafe-any v0.4.1
[INFO] [stderr]     Checking error v0.1.9
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling dbghelp-sys v0.2.0
[INFO] [stderr]    Compiling rustc_version v0.1.7
[INFO] [stderr]     Checking r2d2 v0.7.1
[INFO] [stderr]     Checking num-integer v0.1.32
[INFO] [stderr]     Checking num-complex v0.1.35
[INFO] [stderr]     Checking aho-corasick v0.6.1
[INFO] [stderr]     Checking thread_local v0.3.2
[INFO] [stderr]     Checking typemap v0.3.3
[INFO] [stderr]     Checking idna v0.1.0
[INFO] [stderr]     Checking num-iter v0.1.32
[INFO] [stderr]     Checking plugin v0.2.6
[INFO] [stderr]    Compiling backtrace-sys v0.1.5
[INFO] [stderr]    Compiling unicase v1.4.0
[INFO] [stderr]    Compiling hyper v0.10.3
[INFO] [stderr]     Checking walkdir v0.1.8
[INFO] [stderr]     Checking num-bigint v0.1.35
[INFO] [stderr]     Checking regex v0.2.1
[INFO] [stderr]     Checking tempdir v0.3.5
[INFO] [stderr]     Checking phf_shared v0.7.21
[INFO] [stderr]     Checking url v1.4.0
[INFO] [stderr]     Checking phf v0.7.21
[INFO] [stderr]     Checking num-rational v0.1.35
[INFO] [stderr]    Compiling phf_generator v0.7.21
[INFO] [stderr]    Compiling phf_codegen v0.7.21
[INFO] [stderr]     Checking num v0.1.36
[INFO] [stderr]    Compiling error-chain v0.7.2
[INFO] [stderr]     Checking chrono v0.2.25
[INFO] [stderr]    Compiling mime_guess v1.8.1
[INFO] [stderr]    Compiling metadeps v1.1.1
[INFO] [stderr]    Compiling openssl-sys v0.9.6
[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/d62d3f7fa9a91d933213cc10e20e740608983f64/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/rustwide/target/debug/build/openssl-sys-6a0545c48ced8d0a/build_script_build-6a0545c48ced8d0a.build_script_build.54hp6gly-cgu.0.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-6a0545c48ced8d0a/build_script_build-6a0545c48ced8d0a.build_script_build.54hp6gly-cgu.1.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-6a0545c48ced8d0a/build_script_build-6a0545c48ced8d0a.build_script_build.54hp6gly-cgu.10.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-6a0545c48ced8d0a/build_script_build-6a0545c48ced8d0a.build_script_build.54hp6gly-cgu.11.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-6a0545c48ced8d0a/build_script_build-6a0545c48ced8d0a.build_script_build.54hp6gly-cgu.12.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-6a0545c48ced8d0a/build_script_build-6a0545c48ced8d0a.build_script_build.54hp6gly-cgu.13.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-6a0545c48ced8d0a/build_script_build-6a0545c48ced8d0a.build_script_build.54hp6gly-cgu.14.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-6a0545c48ced8d0a/build_script_build-6a0545c48ced8d0a.build_script_build.54hp6gly-cgu.15.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-6a0545c48ced8d0a/build_script_build-6a0545c48ced8d0a.build_script_build.54hp6gly-cgu.2.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-6a0545c48ced8d0a/build_script_build-6a0545c48ced8d0a.build_script_build.54hp6gly-cgu.3.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-6a0545c48ced8d0a/build_script_build-6a0545c48ced8d0a.build_script_build.54hp6gly-cgu.4.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-6a0545c48ced8d0a/build_script_build-6a0545c48ced8d0a.build_script_build.54hp6gly-cgu.5.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-6a0545c48ced8d0a/build_script_build-6a0545c48ced8d0a.build_script_build.54hp6gly-cgu.6.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-6a0545c48ced8d0a/build_script_build-6a0545c48ced8d0a.build_script_build.54hp6gly-cgu.7.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-6a0545c48ced8d0a/build_script_build-6a0545c48ced8d0a.build_script_build.54hp6gly-cgu.8.rcgu.o" "/opt/rustwide/target/debug/build/openssl-sys-6a0545c48ced8d0a/build_script_build-6a0545c48ced8d0a.build_script_build.54hp6gly-cgu.9.rcgu.o" "-o" "/opt/rustwide/target/debug/build/openssl-sys-6a0545c48ced8d0a/build_script_build-6a0545c48ced8d0a" "/opt/rustwide/target/debug/build/openssl-sys-6a0545c48ced8d0a/build_script_build-6a0545c48ced8d0a.4uf7u49fwnbg7mjl.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/d62d3f7fa9a91d933213cc10e20e740608983f64/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/libmetadeps-642675a198fb8a05.rlib" "/opt/rustwide/target/debug/deps/libtoml-0122a6f963d436a4.rlib" "/opt/rustwide/target/debug/deps/libpkg_config-3dff156404b9c5d6.rlib" "/opt/rustwide/target/debug/deps/liberror_chain-da1e5a6bc43a76ae.rlib" "/opt/rustwide/target/debug/deps/libbacktrace-d070a55c11bc345d.rlib" "/opt/rustwide/target/debug/deps/libbacktrace_sys-6cf3bd03e08f1abc.rlib" "/opt/rustwide/target/debug/deps/librustc_demangle-4b52f0c0ec6272f6.rlib" "/opt/rustwide/target/debug/deps/libcfg_if-03a1101579ae234e.rlib" "/opt/rustwide/target/debug/deps/libdbghelp-8125723676ab7d1d.rlib" "/opt/rustwide/target/debug/deps/libwinapi-f315fac9f78c00fb.rlib" "/opt/rustwide/target/debug/deps/libkernel32-357e0cd2dff55d80.rlib" "/opt/rustwide/target/debug/deps/liblibc-828489f84bacaba4.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/d62d3f7fa9a91d933213cc10e20e740608983f64/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-edfba68bd3501617.rlib" "/opt/rustwide/rustup-home/toolchains/d62d3f7fa9a91d933213cc10e20e740608983f64/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-cb36837ea2d84c1b.rlib" "/opt/rustwide/rustup-home/toolchains/d62d3f7fa9a91d933213cc10e20e740608983f64/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-637cb1b53c807e95.rlib" "/opt/rustwide/rustup-home/toolchains/d62d3f7fa9a91d933213cc10e20e740608983f64/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-099cf0af4375543b.rlib" "/opt/rustwide/rustup-home/toolchains/d62d3f7fa9a91d933213cc10e20e740608983f64/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-b5f18e83369ef257.rlib" "/opt/rustwide/rustup-home/toolchains/d62d3f7fa9a91d933213cc10e20e740608983f64/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-3bb19daa4485d5fe.rlib" "/opt/rustwide/rustup-home/toolchains/d62d3f7fa9a91d933213cc10e20e740608983f64/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-5298ab0591e7fb29.rlib" "/opt/rustwide/rustup-home/toolchains/d62d3f7fa9a91d933213cc10e20e740608983f64/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-2e4947d254d0b599.rlib" "/opt/rustwide/rustup-home/toolchains/d62d3f7fa9a91d933213cc10e20e740608983f64/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-1532436f783b0405.rlib" "/opt/rustwide/rustup-home/toolchains/d62d3f7fa9a91d933213cc10e20e740608983f64/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-3d12d76f5782439f.rlib" "/opt/rustwide/rustup-home/toolchains/d62d3f7fa9a91d933213cc10e20e740608983f64/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-f54fb6b93a192d72.rlib" "/opt/rustwide/rustup-home/toolchains/d62d3f7fa9a91d933213cc10e20e740608983f64/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-d41f1ff31e4e0f27.rlib" "/opt/rustwide/rustup-home/toolchains/d62d3f7fa9a91d933213cc10e20e740608983f64/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-108e5e911ebb4fc8.rlib" "/opt/rustwide/rustup-home/toolchains/d62d3f7fa9a91d933213cc10e20e740608983f64/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-31288459e6a43502.rlib" "/opt/rustwide/rustup-home/toolchains/d62d3f7fa9a91d933213cc10e20e740608983f64/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-c52e5d6301e1bd59.rlib" "/opt/rustwide/rustup-home/toolchains/d62d3f7fa9a91d933213cc10e20e740608983f64/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-2675a9a46b5cec89.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/d62d3f7fa9a91d933213cc10e20e740608983f64/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-f51baad7bbcb81c4.rlib" "-Wl,-Bdynamic" "-lutil" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-ldl" "-lutil"
[INFO] [stdout]   = note: /usr/bin/ld: /opt/rustwide/target/debug/deps/libbacktrace-d070a55c11bc345d.rlib(backtrace-d070a55c11bc345d.backtrace.3mlzvekk-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-d070a55c11bc345d.rlib(backtrace-d070a55c11bc345d.backtrace.3mlzvekk-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" "b5698032df56f842ff71613c957b280bce6848034940deaeee578e4c68deb2f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5698032df56f842ff71613c957b280bce6848034940deaeee578e4c68deb2f5", kill_on_drop: false }`
[INFO] [stdout] b5698032df56f842ff71613c957b280bce6848034940deaeee578e4c68deb2f5