[INFO] updating cached repository jvns/ruby-mem-watcher-demo
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jvns/ruby-mem-watcher-demo
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jvns/ruby-mem-watcher-demo" "work/ex/beta-1.37-6/sources/1.36.0/gh/jvns/ruby-mem-watcher-demo"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/jvns/ruby-mem-watcher-demo'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jvns/ruby-mem-watcher-demo" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jvns/ruby-mem-watcher-demo"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jvns/ruby-mem-watcher-demo'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d6470107282b5734c12196787c8f915c35691299
[INFO] sha for GitHub repo jvns/ruby-mem-watcher-demo: d6470107282b5734c12196787c8f915c35691299
[INFO] validating manifest of jvns/ruby-mem-watcher-demo on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of jvns/ruby-mem-watcher-demo on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing jvns/ruby-mem-watcher-demo
[INFO] finished frobbing jvns/ruby-mem-watcher-demo
[INFO] frobbed toml for jvns/ruby-mem-watcher-demo written to work/ex/beta-1.37-6/sources/1.36.0/gh/jvns/ruby-mem-watcher-demo/Cargo.toml
[INFO] started frobbing jvns/ruby-mem-watcher-demo
[INFO] finished frobbing jvns/ruby-mem-watcher-demo
[INFO] frobbed toml for jvns/ruby-mem-watcher-demo written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jvns/ruby-mem-watcher-demo/Cargo.toml
[INFO] crate jvns/ruby-mem-watcher-demo already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing jvns/ruby-mem-watcher-demo against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jvns/ruby-mem-watcher-demo:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] f4b93ea29f14c30050ab5a8c40c91f3c4a4c94a193bc77bf997457571cdb90e7
[INFO] running `"docker" "start" "-a" "f4b93ea29f14c30050ab5a8c40c91f3c4a4c94a193bc77bf997457571cdb90e7"`
[INFO] [stderr]    Compiling bindgen v0.31.3
[INFO] [stderr]    Compiling which v1.0.3
[INFO] [stderr]    Compiling clang-sys v0.21.1
[INFO] [stderr]    Compiling nom v3.2.1
[INFO] [stderr]    Compiling elf v0.0.10
[INFO] [stderr]    Compiling read-process-memory v0.1.2
[INFO] [stderr]    Compiling env_logger v0.4.3
[INFO] [stderr]    Compiling cexpr v0.2.2
[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/crater/workdir)
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right_matches': superseded by `trim_end_matches`
[INFO] [stderr]    --> src/bin/count-ruby-allocs.rs:138:29
[INFO] [stderr]     |
[INFO] [stderr] 138 |             let name = name.trim_right_matches("\0");
[INFO] [stderr]     |                             ^^^^^^^^^^^^^^^^^^ help: replace the use of the deprecated item: `trim_end_matches`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/bin/count-ruby-allocs.rs:134:21
[INFO] [stderr]     |
[INFO] [stderr] 134 |                 let mut out = f(ptr);
[INFO] [stderr]     |                     ----^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: linking with `cc` failed: exit code: 1
[INFO] [stderr]   |
[INFO] [stderr]   = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-L" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/crater/target/debug/deps/count_ruby_allocs-92d7d997b96f6bc2.count_ruby_allocs.d4trlikh-cgu.0.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-92d7d997b96f6bc2.count_ruby_allocs.d4trlikh-cgu.1.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-92d7d997b96f6bc2.count_ruby_allocs.d4trlikh-cgu.10.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-92d7d997b96f6bc2.count_ruby_allocs.d4trlikh-cgu.11.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-92d7d997b96f6bc2.count_ruby_allocs.d4trlikh-cgu.12.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-92d7d997b96f6bc2.count_ruby_allocs.d4trlikh-cgu.13.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-92d7d997b96f6bc2.count_ruby_allocs.d4trlikh-cgu.14.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-92d7d997b96f6bc2.count_ruby_allocs.d4trlikh-cgu.15.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-92d7d997b96f6bc2.count_ruby_allocs.d4trlikh-cgu.2.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-92d7d997b96f6bc2.count_ruby_allocs.d4trlikh-cgu.3.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-92d7d997b96f6bc2.count_ruby_allocs.d4trlikh-cgu.4.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-92d7d997b96f6bc2.count_ruby_allocs.d4trlikh-cgu.5.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-92d7d997b96f6bc2.count_ruby_allocs.d4trlikh-cgu.6.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-92d7d997b96f6bc2.count_ruby_allocs.d4trlikh-cgu.7.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-92d7d997b96f6bc2.count_ruby_allocs.d4trlikh-cgu.8.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-92d7d997b96f6bc2.count_ruby_allocs.d4trlikh-cgu.9.rcgu.o" "-o" "/opt/crater/target/debug/deps/count_ruby_allocs-92d7d997b96f6bc2" "/opt/crater/target/debug/deps/count_ruby_allocs-92d7d997b96f6bc2.2tjcrg8m5rbdyu7a.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/crater/target/debug/deps" "-L" "/opt/crater/target/debug/build/backtrace-sys-52a124cb037f2e42/out/.libs" "-L" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/crater/target/debug/deps/libruby_fork_test-6dad237f6971b404.rlib" "/opt/crater/target/debug/deps/libbcc-75a6b2fc8ae5ed2b.rlib" "/opt/crater/target/debug/deps/libbyteorder-76838e0ec6a85113.rlib" "/opt/crater/target/debug/deps/libbcc_sys-579f3a3318d5881e.rlib" "/opt/crater/target/debug/deps/libfailure-60cb0250fed81aba.rlib" "/opt/crater/target/debug/deps/libbacktrace-9525cb7e55a45f4a.rlib" "/opt/crater/target/debug/deps/libbacktrace_sys-32a6f0d4f15d3b8b.rlib" "/opt/crater/target/debug/deps/librustc_demangle-709242620b6f35fc.rlib" "/opt/crater/target/debug/deps/libelf-4dc53f7bbd7a2866.rlib" "/opt/crater/target/debug/deps/libbyteorder-22baa336c5b59722.rlib" "/opt/crater/target/debug/deps/libread_process_memory-4d0d0a02e91742de.rlib" "/opt/crater/target/debug/deps/liblibc-5e48f0a18c73291f.rlib" "/opt/crater/target/debug/deps/liblog-c92b861decdc6e30.rlib" "/opt/crater/target/debug/deps/liblog-18bebfdf1d1e5a05.rlib" "/opt/crater/target/debug/deps/libcfg_if-af8485a38956c1b4.rlib" "-Wl,--start-group" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-a80a1e8e09cafef8.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-e0e6351da805c468.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace-e04f54bafc95e331.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace_sys-67901d3322495bd5.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-bd390b1abaceaec1.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-312dd37fdc7bedfc.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-8ed0e51d58d644a3.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-8a423c320a6c707f.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-d6a95598e2238263.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-d231614b153016eb.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-3821619027f463e4.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-1cfd794d18771a44.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-dcf33cf10c2452ef.rlib" "-Wl,--end-group" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-c258fea34bf64bce.rlib" "-Wl,-Bdynamic" "-lbcc" "-lutil" "-lutil" "-ldl" "-lrt" "-lpthread" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-lutil"
[INFO] [stderr]   = note: /usr/bin/ld: cannot find -lbcc
[INFO] [stderr]           collect2: error: ld returned 1 exit status
[INFO] [stderr]           
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `ruby-fork-test`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f4b93ea29f14c30050ab5a8c40c91f3c4a4c94a193bc77bf997457571cdb90e7"`
[INFO] running `"docker" "rm" "-f" "f4b93ea29f14c30050ab5a8c40c91f3c4a4c94a193bc77bf997457571cdb90e7"`
[INFO] [stdout] f4b93ea29f14c30050ab5a8c40c91f3c4a4c94a193bc77bf997457571cdb90e7