Dec 13 18:41:28.568 INFO testing gdberrio/rustos against try#aa49d8ef14939ddec0e34b346b60174a5673d48f for pr-56550
Dec 13 18:41:28.568 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-0/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-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 13 18:41:29.236 INFO [stdout] 047cc6f93cd82a132190c1d83bbec1480c6ef4f9011749600b6fb289e794fa11
Dec 13 18:41:29.238 INFO running `"docker" "start" "-a" "047cc6f93cd82a132190c1d83bbec1480c6ef4f9011749600b6fb289e794fa11"`
Dec 13 18:41:30.861 INFO [stderr] usermod: no changes
Dec 13 18:41:30.975 INFO [stderr]    Compiling rustos v0.1.0 (/source)
Dec 13 18:41:31.146 INFO [stderr] warning: the feature `panic_handler` has been stable since 1.30.0 and no longer requires an attribute to enable
Dec 13 18:41:31.146 INFO [stderr]  --> src/main.rs:1:12
Dec 13 18:41:31.147 INFO [stderr]   |
Dec 13 18:41:31.147 INFO [stderr] 1 | #![feature(panic_handler)]
Dec 13 18:41:31.147 INFO [stderr]   |            ^^^^^^^^^^^^^
Dec 13 18:41:31.147 INFO [stderr]   |
Dec 13 18:41:31.147 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 13 18:41:31.147 INFO [stderr] 
Dec 13 18:41:31.247 INFO [stderr] error: linking with `cc` failed: exit code: 1
Dec 13 18:41:31.247 INFO [stderr]   |
Dec 13 18:41:31.248 INFO [stderr]   = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-L" "/rustup-home/toolchains/aa49d8ef14939ddec0e34b346b60174a5673d48f-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/target/debug/deps/rustos-c780a171b4b4941c.rustos.3tyivg78-cgu.0.rcgu.o" "/target/debug/deps/rustos-c780a171b4b4941c.rustos.3tyivg78-cgu.1.rcgu.o" "-o" "/target/debug/deps/rustos-c780a171b4b4941c" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/target/debug/deps" "-L" "/rustup-home/toolchains/aa49d8ef14939ddec0e34b346b60174a5673d48f-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/target/debug/deps/libbootloader_precompiled-f6798df159e90025.rlib" "/target/debug/deps/libos_bootinfo-527b7dbdafd7d114.rlib" "/rustup-home/toolchains/aa49d8ef14939ddec0e34b346b60174a5673d48f-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-f9a54acb2f768daa.rlib" "/rustup-home/toolchains/aa49d8ef14939ddec0e34b346b60174a5673d48f-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-fd7c3c73a313f74d.rlib" "/rustup-home/toolchains/aa49d8ef14939ddec0e34b346b60174a5673d48f-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-0f941d940954fa72.rlib" "-Wl,-Bdynamic"
Dec 13 18:41:31.248 INFO [stderr]   = note: /target/debug/deps/rustos-c780a171b4b4941c.rustos.3tyivg78-cgu.1.rcgu.o: In function `_start':
Dec 13 18:41:31.248 INFO [stderr]           /source/src/main.rs:18: multiple definition of `_start'
Dec 13 18:41:31.249 INFO [stderr]           /usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/Scrt1.o:(.text+0x0): first defined here
Dec 13 18:41:31.249 INFO [stderr]           /usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
Dec 13 18:41:31.249 INFO [stderr]           (.text+0x12): undefined reference to `__libc_csu_fini'
Dec 13 18:41:31.250 INFO [stderr]           /usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
Dec 13 18:41:31.250 INFO [stderr]           (.text+0x19): undefined reference to `__libc_csu_init'
Dec 13 18:41:31.250 INFO [stderr]           /usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
Dec 13 18:41:31.251 INFO [stderr]           (.text+0x20): undefined reference to `main'
Dec 13 18:41:31.251 INFO [stderr]           /usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
Dec 13 18:41:31.251 INFO [stderr]           (.text+0x25): undefined reference to `__libc_start_main'
Dec 13 18:41:31.251 INFO [stderr]           collect2: error: ld returned 1 exit status
Dec 13 18:41:31.252 INFO [stderr]           
Dec 13 18:41:31.252 INFO [stderr] 
Dec 13 18:41:31.252 INFO [stderr] error: aborting due to previous error
Dec 13 18:41:31.252 INFO [stderr] 
Dec 13 18:41:31.254 INFO [stderr] error: Could not compile `rustos`.
Dec 13 18:41:31.254 INFO [stderr] 
Dec 13 18:41:31.254 INFO [stderr] To learn more, run the command again with --verbose.
Dec 13 18:41:31.256 INFO [stderr] su: No module specific data is present
Dec 13 18:41:32.139 INFO running `"docker" "inspect" "047cc6f93cd82a132190c1d83bbec1480c6ef4f9011749600b6fb289e794fa11"`
Dec 13 18:41:32.467 INFO running `"docker" "rm" "-f" "047cc6f93cd82a132190c1d83bbec1480c6ef4f9011749600b6fb289e794fa11"`
Dec 13 18:41:32.835 INFO [stdout] 047cc6f93cd82a132190c1d83bbec1480c6ef4f9011749600b6fb289e794fa11