Dec 06 16:00:59.877 INFO testing AleVul/kernel_playground against try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468 for pr-56514
Dec 06 16:00:59.877 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-4/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 06 16:01:00.303 INFO [stdout] a81b65086f75528c957f5c7e6086c28105c8d8a3e3bf22352e378018a97abde6
Dec 06 16:01:00.305 INFO running `"docker" "start" "-a" "a81b65086f75528c957f5c7e6086c28105c8d8a3e3bf22352e378018a97abde6"`
Dec 06 16:01:01.624 INFO [stderr] usermod: no changes
Dec 06 16:01:01.720 INFO [stderr]    Compiling x86_64 v0.2.11
Dec 06 16:01:03.635 INFO [stderr]    Compiling bootloader_precompiled v0.3.0
Dec 06 16:01:04.212 INFO [stderr]    Compiling kernel_playground v0.1.0 (/source)
Dec 06 16:01:04.863 INFO [stderr] error: linking with `cc` failed: exit code: 1
Dec 06 16:01:04.863 INFO [stderr]   |
Dec 06 16:01:04.863 INFO [stderr]   = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-L" "/rustup-home/toolchains/6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/target/debug/deps/kernel_playground-6cd7066311a1f303.kernel_playground.7pidbifj-cgu.0.rcgu.o" "/target/debug/deps/kernel_playground-6cd7066311a1f303.kernel_playground.7pidbifj-cgu.1.rcgu.o" "/target/debug/deps/kernel_playground-6cd7066311a1f303.kernel_playground.7pidbifj-cgu.2.rcgu.o" "/target/debug/deps/kernel_playground-6cd7066311a1f303.kernel_playground.7pidbifj-cgu.3.rcgu.o" "/target/debug/deps/kernel_playground-6cd7066311a1f303.kernel_playground.7pidbifj-cgu.4.rcgu.o" "-o" "/target/debug/deps/kernel_playground-6cd7066311a1f303" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/target/debug/deps" "-L" "/rustup-home/toolchains/6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/target/debug/deps/libbootloader_precompiled-ea4158a65d2f2273.rlib" "/target/debug/deps/libx86_64-4de941f9f656a6f4.rlib" "/target/debug/deps/libux-f77c128df744c901.rlib" "/target/debug/deps/libusize_conversions-4f57bc02f64e3359.rlib" "/target/debug/deps/libos_bootinfo-7b37f3702e63d4d0.rlib" "/target/debug/deps/libbit_field-b025f95ba31eaa71.rlib" "/target/debug/deps/libbitflags-6c28c1e2f121c703.rlib" "/rustup-home/toolchains/6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-d6e924fd18f7775d.rlib" "/rustup-home/toolchains/6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-0ed18ce3338a020a.rlib" "-Wl,-Bdynamic"
Dec 06 16:01:04.863 INFO [stderr]   = note: /target/debug/deps/kernel_playground-6cd7066311a1f303.kernel_playground.7pidbifj-cgu.1.rcgu.o: In function `_start':
Dec 06 16:01:04.863 INFO [stderr]           /source/src/main.rs:17: multiple definition of `_start'
Dec 06 16:01:04.863 INFO [stderr]           /usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/Scrt1.o:(.text+0x0): first defined here
Dec 06 16:01:04.863 INFO [stderr]           /usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
Dec 06 16:01:04.863 INFO [stderr]           (.text+0x12): undefined reference to `__libc_csu_fini'
Dec 06 16:01:04.863 INFO [stderr]           /usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
Dec 06 16:01:04.863 INFO [stderr]           (.text+0x19): undefined reference to `__libc_csu_init'
Dec 06 16:01:04.863 INFO [stderr]           /usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
Dec 06 16:01:04.863 INFO [stderr]           (.text+0x20): undefined reference to `main'
Dec 06 16:01:04.863 INFO [stderr]           /usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
Dec 06 16:01:04.863 INFO [stderr]           (.text+0x25): undefined reference to `__libc_start_main'
Dec 06 16:01:04.863 INFO [stderr]           collect2: error: ld returned 1 exit status
Dec 06 16:01:04.863 INFO [stderr]           
Dec 06 16:01:04.863 INFO [stderr] 
Dec 06 16:01:04.863 INFO [stderr] error: aborting due to previous error
Dec 06 16:01:04.863 INFO [stderr] 
Dec 06 16:01:04.865 INFO [stderr] error: Could not compile `kernel_playground`.
Dec 06 16:01:04.865 INFO [stderr] 
Dec 06 16:01:04.865 INFO [stderr] To learn more, run the command again with --verbose.
Dec 06 16:01:04.866 INFO [stderr] su: No module specific data is present
Dec 06 16:01:05.506 INFO running `"docker" "inspect" "a81b65086f75528c957f5c7e6086c28105c8d8a3e3bf22352e378018a97abde6"`
Dec 06 16:01:05.727 INFO running `"docker" "rm" "-f" "a81b65086f75528c957f5c7e6086c28105c8d8a3e3bf22352e378018a97abde6"`
Dec 06 16:01:05.920 INFO [stdout] a81b65086f75528c957f5c7e6086c28105c8d8a3e3bf22352e378018a97abde6