[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-1.38-1/sources/1.37.0/gh/jvns/ruby-mem-watcher-demo"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/gh/jvns/ruby-mem-watcher-demo"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of jvns/ruby-mem-watcher-demo on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "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-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/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" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing jvns/ruby-mem-watcher-demo against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] d7f7853b5358e57543ac889009a74da072d4895c151c22da287e040231e2178d
[INFO] running `"docker" "start" "-a" "d7f7853b5358e57543ac889009a74da072d4895c151c22da287e040231e2178d"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling bindgen v0.31.3
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]    Compiling which v1.0.3
[INFO] [stderr]    Compiling clang-sys v0.21.1
[INFO] [stderr]    Compiling elf v0.0.10
[INFO] [stderr]    Compiling read-process-memory v0.1.2
[INFO] [stderr]    Compiling failure v0.1.1
[INFO] [stderr]    Compiling aho-corasick v0.6.4
[INFO] [stderr]    Compiling nom v3.2.1
[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 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/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/crater/target/debug/deps/count_ruby_allocs-138ea0a3623d065d.count_ruby_allocs.8jr1dx4t-cgu.0.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-138ea0a3623d065d.count_ruby_allocs.8jr1dx4t-cgu.1.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-138ea0a3623d065d.count_ruby_allocs.8jr1dx4t-cgu.10.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-138ea0a3623d065d.count_ruby_allocs.8jr1dx4t-cgu.11.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-138ea0a3623d065d.count_ruby_allocs.8jr1dx4t-cgu.12.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-138ea0a3623d065d.count_ruby_allocs.8jr1dx4t-cgu.13.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-138ea0a3623d065d.count_ruby_allocs.8jr1dx4t-cgu.14.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-138ea0a3623d065d.count_ruby_allocs.8jr1dx4t-cgu.15.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-138ea0a3623d065d.count_ruby_allocs.8jr1dx4t-cgu.2.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-138ea0a3623d065d.count_ruby_allocs.8jr1dx4t-cgu.3.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-138ea0a3623d065d.count_ruby_allocs.8jr1dx4t-cgu.4.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-138ea0a3623d065d.count_ruby_allocs.8jr1dx4t-cgu.5.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-138ea0a3623d065d.count_ruby_allocs.8jr1dx4t-cgu.6.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-138ea0a3623d065d.count_ruby_allocs.8jr1dx4t-cgu.7.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-138ea0a3623d065d.count_ruby_allocs.8jr1dx4t-cgu.8.rcgu.o" "/opt/crater/target/debug/deps/count_ruby_allocs-138ea0a3623d065d.count_ruby_allocs.8jr1dx4t-cgu.9.rcgu.o" "-o" "/opt/crater/target/debug/deps/count_ruby_allocs-138ea0a3623d065d" "/opt/crater/target/debug/deps/count_ruby_allocs-138ea0a3623d065d.dufalpgjmuokpxa.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-24b2e18e6215df57/out/.libs" "-L" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/crater/target/debug/deps/libruby_fork_test-aac0dbfe6c993899.rlib" "/opt/crater/target/debug/deps/libbcc-e0ea45a2127ac371.rlib" "/opt/crater/target/debug/deps/libbyteorder-90775fa756ff2755.rlib" "/opt/crater/target/debug/deps/libbcc_sys-e534e57c741f460b.rlib" "/opt/crater/target/debug/deps/libfailure-0ba20901cf8d40c2.rlib" "/opt/crater/target/debug/deps/libbacktrace-e7fafb1aaf8e5ebe.rlib" "/opt/crater/target/debug/deps/libbacktrace_sys-834a3bda6c3fb9c2.rlib" "/opt/crater/target/debug/deps/librustc_demangle-5967d01fc3b65b86.rlib" "/opt/crater/target/debug/deps/libelf-73cefe409bde30d7.rlib" "/opt/crater/target/debug/deps/libbyteorder-a3968c370c7b24cf.rlib" "/opt/crater/target/debug/deps/libread_process_memory-32c353215d51ed86.rlib" "/opt/crater/target/debug/deps/liblibc-75fd0ac04bb19b9a.rlib" "/opt/crater/target/debug/deps/liblog-e203744bef71d14e.rlib" "/opt/crater/target/debug/deps/liblog-9a4573bfd4d75161.rlib" "/opt/crater/target/debug/deps/libcfg_if-f0641b5a9a5cde64.rlib" "-Wl,--start-group" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-4a76ff35a356aedf.rlib" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-e11c7b3b3225afe2.rlib" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace-13217ede3d276f16.rlib" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace_sys-621a9ee22da6caa1.rlib" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-546c844e8071bbeb.rlib" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-be9569e4d599746f.rlib" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-47d8845cef2a3bc5.rlib" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-017511bce73a530c.rlib" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-be7979c57a08057b.rlib" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-d6459c4f0817c67c.rlib" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-580035dd98451925.rlib" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-aee5c24fff305dea.rlib" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-8a55a4098920125a.rlib" "-Wl,--end-group" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-9fc4b5be2ba5cc19.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" "d7f7853b5358e57543ac889009a74da072d4895c151c22da287e040231e2178d"`
[INFO] running `"docker" "rm" "-f" "d7f7853b5358e57543ac889009a74da072d4895c151c22da287e040231e2178d"`
[INFO] [stdout] d7f7853b5358e57543ac889009a74da072d4895c151c22da287e040231e2178d