[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 master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[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 a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "fetch" "--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-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f205c9a5520b04965bbf6381d4627f7917af25248e19ac6e9e1a741dbf1918d1
[INFO] running `Command { std: "docker" "start" "-a" "f205c9a5520b04965bbf6381d4627f7917af25248e19ac6e9e1a741dbf1918d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f205c9a5520b04965bbf6381d4627f7917af25248e19ac6e9e1a741dbf1918d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f205c9a5520b04965bbf6381d4627f7917af25248e19ac6e9e1a741dbf1918d1", kill_on_drop: false }`
[INFO] [stdout] f205c9a5520b04965bbf6381d4627f7917af25248e19ac6e9e1a741dbf1918d1
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 357049d08851f1912f76e7ce10628116d30dd70400e7a72851985fb1d00823c8
[INFO] running `Command { std: "docker" "start" "-a" "357049d08851f1912f76e7ce10628116d30dd70400e7a72851985fb1d00823c8", kill_on_drop: false }`
[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 glob v0.2.11
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling libloading v0.4.3
[INFO] [stderr]    Compiling utf8-ranges v1.0.0
[INFO] [stderr]    Compiling unicode-width v0.1.4
[INFO] [stderr]    Compiling regex-syntax v0.4.2
[INFO] [stderr]    Compiling ansi_term v0.10.2
[INFO] [stderr]    Compiling bitflags v1.0.1
[INFO] [stderr]    Compiling bindgen v0.31.3
[INFO] [stderr]    Compiling cc v1.0.4
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling strsim v0.6.0
[INFO] [stderr]    Compiling vec_map v0.8.0
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling lazy_static v0.2.11
[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 log v0.4.1
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling thread_local v0.3.5
[INFO] [stderr]    Compiling textwrap v0.9.0
[INFO] [stderr]    Compiling elf v0.0.10
[INFO] [stderr]    Compiling syn v0.11.11
[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 read-process-memory v0.1.2
[INFO] [stderr]    Compiling clang-sys v0.21.1
[INFO] [stderr]    Compiling clap v2.29.2
[INFO] [stderr]    Compiling aho-corasick v0.6.4
[INFO] [stderr]    Compiling nom v3.2.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]    Compiling regex v0.2.5
[INFO] [stderr]    Compiling synstructure v0.6.1
[INFO] [stderr]    Compiling cexpr v0.2.2
[INFO] [stderr]    Compiling failure_derive v0.1.1
[INFO] [stderr]    Compiling env_logger v0.4.3
[INFO] [stderr]    Compiling bcc-sys v0.4.0
[INFO] [stderr]    Compiling backtrace v0.3.5
[INFO] [stderr]    Compiling failure v0.1.1
[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]    |                     ^^                             ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 24 -     maps.iter().any({ |map| map.contains_addr(addr) })
[INFO] [stdout] 24 +     maps.iter().any(|map| map.contains_addr(addr))
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `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 associated function: `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 status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-m64" "/opt/rustwide/target/debug/deps/count_ruby_allocs-a0e04504a4ac9aad.count_ruby_allocs.2904f887-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-a0e04504a4ac9aad.count_ruby_allocs.2904f887-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-a0e04504a4ac9aad.count_ruby_allocs.2904f887-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-a0e04504a4ac9aad.count_ruby_allocs.2904f887-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-a0e04504a4ac9aad.count_ruby_allocs.2904f887-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-a0e04504a4ac9aad.count_ruby_allocs.2904f887-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-a0e04504a4ac9aad.count_ruby_allocs.2904f887-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-a0e04504a4ac9aad.count_ruby_allocs.2904f887-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-a0e04504a4ac9aad.count_ruby_allocs.2904f887-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-a0e04504a4ac9aad.count_ruby_allocs.2904f887-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-a0e04504a4ac9aad.count_ruby_allocs.2904f887-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-a0e04504a4ac9aad.count_ruby_allocs.2904f887-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-a0e04504a4ac9aad.count_ruby_allocs.2904f887-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-a0e04504a4ac9aad.count_ruby_allocs.2904f887-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-a0e04504a4ac9aad.count_ruby_allocs.2904f887-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-a0e04504a4ac9aad.count_ruby_allocs.2904f887-cgu.9.rcgu.o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-a0e04504a4ac9aad.4uc6iaiz6wmgxmkb.rcgu.o" "-Wl,--as-needed" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/target/debug/build/backtrace-sys-3595d0d796979d20/out/.libs" "-L" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/libruby_fork_test-fe2930bc5d8a9301.rlib" "/opt/rustwide/target/debug/deps/libbcc-db235277c31d0d37.rlib" "/opt/rustwide/target/debug/deps/libbyteorder-3a1d3362ecf13d1e.rlib" "/opt/rustwide/target/debug/deps/libbcc_sys-f1f6ce370e182538.rlib" "/opt/rustwide/target/debug/deps/libfailure-9f0762015b3df3ba.rlib" "/opt/rustwide/target/debug/deps/libbacktrace-bceb23e11672f93e.rlib" "/opt/rustwide/target/debug/deps/libbacktrace_sys-6d9bc595bdf0dc0c.rlib" "/opt/rustwide/target/debug/deps/librustc_demangle-8d494d407893d4eb.rlib" "/opt/rustwide/target/debug/deps/libelf-5070c577d8724dfb.rlib" "/opt/rustwide/target/debug/deps/libbyteorder-f7a78ccb944e69cd.rlib" "/opt/rustwide/target/debug/deps/libread_process_memory-8929d8e3508da6cc.rlib" "/opt/rustwide/target/debug/deps/liblibc-5603fc2715564cad.rlib" "/opt/rustwide/target/debug/deps/liblog-9df6e84bfbc330d4.rlib" "/opt/rustwide/target/debug/deps/liblog-006d67ee1f1f18c7.rlib" "/opt/rustwide/target/debug/deps/libcfg_if-ba9e854e41f15abc.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-29e5e596e889a0aa.rlib" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-1b145d9fcdc08832.rlib" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-5b037ee6b77e2ff0.rlib" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-9635a64fca0ebd28.rlib" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-a7574eb9bb7a8fc5.rlib" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib/libmemchr-f5fa1dc334dcaeeb.rlib" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-6ee570a898e75ef0.rlib" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-afb62f29a0815772.rlib" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd_detect-a632746535fd9988.rlib" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-25acc307bcb1d7b6.rlib" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-377721a625f6ace7.rlib" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-43c01431c8a4ee6f.rlib" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-5f74725679453254.rlib" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-2b35d8999819161d.rlib" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-a81f2980c3f58cf2.rlib" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-57b4679830289815.rlib" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-2a6a2797f7a73818.rlib" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-0e3656b1fda5fd7b.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-13b419dfbcf9c1f8.rlib" "-Wl,-Bdynamic" "-lbcc" "-lutil" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/count_ruby_allocs-a0e04504a4ac9aad" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro,-znow" "-nodefaultlibs"
[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` due to 2 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "357049d08851f1912f76e7ce10628116d30dd70400e7a72851985fb1d00823c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "357049d08851f1912f76e7ce10628116d30dd70400e7a72851985fb1d00823c8", kill_on_drop: false }`
[INFO] [stdout] 357049d08851f1912f76e7ce10628116d30dd70400e7a72851985fb1d00823c8