[INFO] cloning repository https://github.com/jvns/ruby-mem-watcher-demo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jvns/ruby-mem-watcher-demo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjvns%2Fruby-mem-watcher-demo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjvns%2Fruby-mem-watcher-demo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d6470107282b5734c12196787c8f915c35691299
[INFO] testing jvns/ruby-mem-watcher-demo against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjvns%2Fruby-mem-watcher-demo" "/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/jvns/ruby-mem-watcher-demo on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jvns/ruby-mem-watcher-demo
[INFO] finished tweaking git repo https://github.com/jvns/ruby-mem-watcher-demo
[INFO] tweaked toml for git repo https://github.com/jvns/ruby-mem-watcher-demo written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/jvns/ruby-mem-watcher-demo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bindgen v0.31.3
[INFO] [stderr]   Downloaded cexpr v0.2.2
[INFO] [stderr]   Downloaded which v1.0.3
[INFO] [stderr]   Downloaded clang-sys v0.21.1
[INFO] [stderr]   Downloaded bcc v0.0.1
[INFO] [stderr]   Downloaded mach v0.0.5
[INFO] [stderr]   Downloaded read-process-memory v0.1.2
[INFO] [stderr]   Downloaded bcc-sys v0.4.0
[INFO] [stderr]   Downloaded elf v0.0.10
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dc2bbd6ebebb0e7b6dcd3b8e199d1f7695e6eb72f71ed1b453f5b49120a45056
[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" "dc2bbd6ebebb0e7b6dcd3b8e199d1f7695e6eb72f71ed1b453f5b49120a45056", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dc2bbd6ebebb0e7b6dcd3b8e199d1f7695e6eb72f71ed1b453f5b49120a45056", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc2bbd6ebebb0e7b6dcd3b8e199d1f7695e6eb72f71ed1b453f5b49120a45056", kill_on_drop: false }`
[INFO] [stdout] dc2bbd6ebebb0e7b6dcd3b8e199d1f7695e6eb72f71ed1b453f5b49120a45056
[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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 37eba0954d6f4a4f87673adb0b9a9215fd95134c1e7f7c4521be6c8b01320d65
[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" "37eba0954d6f4a4f87673adb0b9a9215fd95134c1e7f7c4521be6c8b01320d65", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.36
[INFO] [stderr]    Compiling cfg-if v0.1.2
[INFO] [stderr]    Compiling lazy_static v1.0.0
[INFO] [stderr]    Compiling libloading v0.4.3
[INFO] [stderr]    Compiling unicode-width v0.1.4
[INFO] [stderr]    Compiling regex-syntax v0.4.2
[INFO] [stderr]    Compiling bindgen v0.31.3
[INFO] [stderr]    Compiling ansi_term v0.10.2
[INFO] [stderr]    Compiling bitflags v1.0.1
[INFO] [stderr]    Compiling cc v1.0.4
[INFO] [stderr]    Compiling strsim v0.6.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.5
[INFO] [stderr]    Compiling byteorder v0.5.3
[INFO] [stderr]    Compiling byteorder v1.2.1
[INFO] [stderr]    Compiling clang-sys v0.21.1
[INFO] [stderr]    Compiling log v0.4.1
[INFO] [stderr]    Compiling textwrap v0.9.0
[INFO] [stderr]    Compiling thread_local v0.3.5
[INFO] [stderr]    Compiling elf v0.0.10
[INFO] [stderr]    Compiling synstructure v0.6.1
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]    Compiling atty v0.2.6
[INFO] [stderr]    Compiling which v1.0.3
[INFO] [stderr]    Compiling nom v3.2.1
[INFO] [stderr]    Compiling clap v2.29.2
[INFO] [stderr]    Compiling read-process-memory v0.1.2
[INFO] [stderr]    Compiling aho-corasick v0.6.4
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]    Compiling failure_derive v0.1.1
[INFO] [stderr]    Compiling regex v0.2.5
[INFO] [stderr]    Compiling cexpr v0.2.2
[INFO] [stderr]    Compiling env_logger v0.4.3
[INFO] [stderr]    Compiling backtrace v0.3.5
[INFO] [stderr]    Compiling failure v0.1.1
[INFO] [stderr]    Compiling bcc-sys v0.4.0
[INFO] [stderr]    Compiling bcc v0.0.1
[INFO] [stderr]    Compiling ruby-fork-test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary braces around method argument
[INFO] [stdout]   --> src/proc_maps.rs:24:21
[INFO] [stdout]    |
[INFO] [stdout] 24 |     maps.iter().any({ |map| map.contains_addr(addr) })
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'core::str::<impl str>::trim_right_matches': superseded by `trim_end_matches`
[INFO] [stdout]    --> src/bin/count-ruby-allocs.rs:138:29
[INFO] [stdout]     |
[INFO] [stdout] 138 |             let name = name.trim_right_matches("\0");
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^ help: replace the use of the deprecated item: `trim_end_matches`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/bin/count-ruby-allocs.rs:134:21
[INFO] [stdout]     |
[INFO] [stdout] 134 |                 let mut out = f(ptr);
[INFO] [stdout]     |                     ----^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[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/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/rustwide/target/debug/deps/count_ruby_allocs-96ebce10987eb5cd.count_ruby_allocs.181sozvj-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-96ebce10987eb5cd.count_ruby_allocs.181sozvj-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-96ebce10987eb5cd.count_ruby_allocs.181sozvj-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-96ebce10987eb5cd.count_ruby_allocs.181sozvj-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-96ebce10987eb5cd.count_ruby_allocs.181sozvj-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-96ebce10987eb5cd.count_ruby_allocs.181sozvj-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-96ebce10987eb5cd.count_ruby_allocs.181sozvj-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-96ebce10987eb5cd.count_ruby_allocs.181sozvj-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-96ebce10987eb5cd.count_ruby_allocs.181sozvj-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-96ebce10987eb5cd.count_ruby_allocs.181sozvj-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-96ebce10987eb5cd.count_ruby_allocs.181sozvj-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-96ebce10987eb5cd.count_ruby_allocs.181sozvj-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-96ebce10987eb5cd.count_ruby_allocs.181sozvj-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-96ebce10987eb5cd.count_ruby_allocs.181sozvj-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-96ebce10987eb5cd.count_ruby_allocs.181sozvj-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-96ebce10987eb5cd.count_ruby_allocs.181sozvj-cgu.9.rcgu.o" "-o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-96ebce10987eb5cd" "/opt/rustwide/target/debug/deps/count_ruby_allocs-96ebce10987eb5cd.z1pr8sqh5yhhuj6.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/target/debug/build/backtrace-sys-2f54d4435d0eab90/out/.libs" "-L" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/libruby_fork_test-06fd7a3d0743478a.rlib" "/opt/rustwide/target/debug/deps/libbcc-a9b3c0ed59c0bacf.rlib" "/opt/rustwide/target/debug/deps/libbyteorder-2b6e837f04c88271.rlib" "/opt/rustwide/target/debug/deps/libbcc_sys-5b1e955f0bc6cd9e.rlib" "/opt/rustwide/target/debug/deps/libfailure-0aa6138681166245.rlib" "/opt/rustwide/target/debug/deps/libbacktrace-0b7f4a88040293a4.rlib" "/opt/rustwide/target/debug/deps/libbacktrace_sys-d67108fbed8d50e0.rlib" "/opt/rustwide/target/debug/deps/librustc_demangle-e25cf16d7b9013c8.rlib" "/opt/rustwide/target/debug/deps/libelf-5390d494505d1bed.rlib" "/opt/rustwide/target/debug/deps/libbyteorder-6cddcccd56d44b5d.rlib" "/opt/rustwide/target/debug/deps/libread_process_memory-ec0b02f48ef12021.rlib" "/opt/rustwide/target/debug/deps/liblibc-d1ca0df17a87eb10.rlib" "/opt/rustwide/target/debug/deps/liblog-aea6dc0a6e1e1af6.rlib" "/opt/rustwide/target/debug/deps/liblog-a6b8a2944644cb1b.rlib" "/opt/rustwide/target/debug/deps/libcfg_if-c9fbad6ac4100047.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-d66e0ceb8eaec9b8.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-9717ec0599b569a0.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-04369de9ba916647.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-997d622c2e4dbe5c.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace-0359c4288a5ef89f.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace_sys-1b25ede22d698ab3.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-37940b486a68e488.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-06b77c27e794c7c6.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-4d07e02a8df36da1.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-fb29e0695c0a0f79.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-e16188b4cf97e8bb.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-5eb391c8dabdee77.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-b0689b528b222bee.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-ed072ac495e62e7a.rlib" "-Wl,-Bdynamic" "-lbcc" "-lutil" "-lutil" "-ldl" "-lrt" "-lpthread" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-ldl" "-lutil"
[INFO] [stdout]   = note: /usr/bin/ld: cannot find -lbcc
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ruby-fork-test`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "37eba0954d6f4a4f87673adb0b9a9215fd95134c1e7f7c4521be6c8b01320d65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37eba0954d6f4a4f87673adb0b9a9215fd95134c1e7f7c4521be6c8b01320d65", kill_on_drop: false }`
[INFO] [stdout] 37eba0954d6f4a4f87673adb0b9a9215fd95134c1e7f7c4521be6c8b01320d65