[INFO] updating cached repository Slimakanzer/RustLearning
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Slimakanzer/RustLearning
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Slimakanzer/RustLearning" "work/ex/beta-1.38-1/sources/1.37.0/gh/Slimakanzer/RustLearning"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Slimakanzer/RustLearning'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Slimakanzer/RustLearning" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Slimakanzer/RustLearning"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Slimakanzer/RustLearning'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d67fde7e6bfae169f924a7815220b16935e8b568
[INFO] sha for GitHub repo Slimakanzer/RustLearning: d67fde7e6bfae169f924a7815220b16935e8b568
[INFO] validating manifest of Slimakanzer/RustLearning 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 Slimakanzer/RustLearning 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 Slimakanzer/RustLearning
[INFO] finished frobbing Slimakanzer/RustLearning
[INFO] frobbed toml for Slimakanzer/RustLearning written to work/ex/beta-1.38-1/sources/1.37.0/gh/Slimakanzer/RustLearning/Cargo.toml
[INFO] started frobbing Slimakanzer/RustLearning
[INFO] finished frobbing Slimakanzer/RustLearning
[INFO] frobbed toml for Slimakanzer/RustLearning written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Slimakanzer/RustLearning/Cargo.toml
[INFO] crate Slimakanzer/RustLearning 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 Slimakanzer/RustLearning 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-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Slimakanzer/RustLearning:/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] 3e016a1954e402a3117c12d7404149e75eea27773d9cd3090f352e1bcb064841
[INFO] running `"docker" "start" "-a" "3e016a1954e402a3117c12d7404149e75eea27773d9cd3090f352e1bcb064841"`
[INFO] [stderr]    Compiling cl-sys v0.4.1
[INFO] [stderr]    Compiling nodrop v0.1.12
[INFO] [stderr]    Compiling colorify v0.2.3
[INFO] [stderr]    Compiling qutex v0.2.1
[INFO] [stderr]    Compiling ocl-core v0.9.0
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling failure v0.1.1
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling ocl-core-vector v0.1.0
[INFO] [stderr]    Compiling ocl v0.18.0
[INFO] [stderr] warning[E0502]: cannot borrow `self.cmd.buffer.obj_core` as immutable because it is also borrowed as mutable
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/ocl-0.18.0/src/standard/buffer.rs:1609:13
[INFO] [stderr]      |
[INFO] [stderr] 1606 |         let (offset, len, queue, flags, ewait, enew, /*is_mapped*/) = self.enq_details()?;
[INFO] [stderr]      |                                                                       ---- mutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 1609 |             &self.cmd.buffer.obj_core, true, flags, offset, len, ewait, enew)?;
[INFO] [stderr]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^ immutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 1614 |             queue.clone()))
[INFO] [stderr]      |             ----- mutable borrow later used here
[INFO] [stderr]      |
[INFO] [stderr]      = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]      = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]      = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr] warning[E0502]: cannot borrow `self.cmd.buffer.obj_core` as immutable because it is also borrowed as mutable
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/ocl-0.18.0/src/standard/buffer.rs:1613:57
[INFO] [stderr]      |
[INFO] [stderr] 1606 |         let (offset, len, queue, flags, ewait, enew, /*is_mapped*/) = self.enq_details()?;
[INFO] [stderr]      |                                                                       ---- mutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 1613 |         Ok(MemMap::new(mm_core, len, None, unmap_event, self.cmd.buffer.obj_core.clone(),
[INFO] [stderr]      |                                                         ^^^^^^^^^^^^^^^^^^^^^^^^ immutable borrow occurs here
[INFO] [stderr] 1614 |             queue.clone()))
[INFO] [stderr]      |             ----- mutable borrow later used here
[INFO] [stderr]      |
[INFO] [stderr]      = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]      = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]      = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr] warning[E0502]: cannot borrow `self.cmd.buffer.obj_core` as immutable because it is also borrowed as mutable
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/ocl-0.18.0/src/standard/buffer.rs:1635:13
[INFO] [stderr]      |
[INFO] [stderr] 1630 |         let (offset, len, queue, flags, ewait, enew, /*is_mapped*/) = self.enq_details()?;
[INFO] [stderr]      |                                                                       ---- mutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 1635 |             &self.cmd.buffer.obj_core, false, flags, offset, len, ewait,
[INFO] [stderr]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^ immutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 1646 |             self.cmd.buffer.obj_core.clone(), queue.clone(), /*is_mapped*/))
[INFO] [stderr]      |                                               ----- mutable borrow later used here
[INFO] [stderr]      |
[INFO] [stderr]      = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]      = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]      = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr] warning[E0502]: cannot borrow `self.cmd.buffer.obj_core` as immutable because it is also borrowed as mutable
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/ocl-0.18.0/src/standard/buffer.rs:1646:13
[INFO] [stderr]      |
[INFO] [stderr] 1630 |         let (offset, len, queue, flags, ewait, enew, /*is_mapped*/) = self.enq_details()?;
[INFO] [stderr]      |                                                                       ---- mutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 1646 |             self.cmd.buffer.obj_core.clone(), queue.clone(), /*is_mapped*/))
[INFO] [stderr]      |             ^^^^^^^^^^^^^^^^^^^^^^^^          ----- mutable borrow later used here
[INFO] [stderr]      |             |
[INFO] [stderr]      |             immutable borrow occurs here
[INFO] [stderr]      |
[INFO] [stderr]      = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]      = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]      = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr]    Compiling rust_learning v0.1.0 (/opt/crater/workdir)
[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/rust_learning-16e7eebaf96072dc.rust_learning.12zfsyuh-cgu.0.rcgu.o" "/opt/crater/target/debug/deps/rust_learning-16e7eebaf96072dc.rust_learning.12zfsyuh-cgu.1.rcgu.o" "/opt/crater/target/debug/deps/rust_learning-16e7eebaf96072dc.rust_learning.12zfsyuh-cgu.10.rcgu.o" "/opt/crater/target/debug/deps/rust_learning-16e7eebaf96072dc.rust_learning.12zfsyuh-cgu.11.rcgu.o" "/opt/crater/target/debug/deps/rust_learning-16e7eebaf96072dc.rust_learning.12zfsyuh-cgu.12.rcgu.o" "/opt/crater/target/debug/deps/rust_learning-16e7eebaf96072dc.rust_learning.12zfsyuh-cgu.13.rcgu.o" "/opt/crater/target/debug/deps/rust_learning-16e7eebaf96072dc.rust_learning.12zfsyuh-cgu.14.rcgu.o" "/opt/crater/target/debug/deps/rust_learning-16e7eebaf96072dc.rust_learning.12zfsyuh-cgu.15.rcgu.o" "/opt/crater/target/debug/deps/rust_learning-16e7eebaf96072dc.rust_learning.12zfsyuh-cgu.2.rcgu.o" "/opt/crater/target/debug/deps/rust_learning-16e7eebaf96072dc.rust_learning.12zfsyuh-cgu.3.rcgu.o" "/opt/crater/target/debug/deps/rust_learning-16e7eebaf96072dc.rust_learning.12zfsyuh-cgu.4.rcgu.o" "/opt/crater/target/debug/deps/rust_learning-16e7eebaf96072dc.rust_learning.12zfsyuh-cgu.5.rcgu.o" "/opt/crater/target/debug/deps/rust_learning-16e7eebaf96072dc.rust_learning.12zfsyuh-cgu.6.rcgu.o" "/opt/crater/target/debug/deps/rust_learning-16e7eebaf96072dc.rust_learning.12zfsyuh-cgu.7.rcgu.o" "/opt/crater/target/debug/deps/rust_learning-16e7eebaf96072dc.rust_learning.12zfsyuh-cgu.8.rcgu.o" "/opt/crater/target/debug/deps/rust_learning-16e7eebaf96072dc.rust_learning.12zfsyuh-cgu.9.rcgu.o" "-o" "/opt/crater/target/debug/deps/rust_learning-16e7eebaf96072dc" "/opt/crater/target/debug/deps/rust_learning-16e7eebaf96072dc.4x79t11ax3k5w8jr.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-6e8c30d8794fff2c/out" "-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/libcolorify-b816ded4c93c211e.rlib" "/opt/crater/target/debug/deps/libocl-457e430b826347f8.rlib" "/opt/crater/target/debug/deps/libqutex-eb0763b636703ede.rlib" "/opt/crater/target/debug/deps/libcrossbeam-059bd6b2f9ab096d.rlib" "/opt/crater/target/debug/deps/libnodrop-ebe102d76b342fed.rlib" "/opt/crater/target/debug/deps/libocl_core-b5bc833d25911fbe.rlib" "/opt/crater/target/debug/deps/libcl_sys-8214102373ae27ca.rlib" "/opt/crater/target/debug/deps/libocl_core_vector-fa622a6dca8055f3.rlib" "/opt/crater/target/debug/deps/libnum-c61678409b3e0098.rlib" "/opt/crater/target/debug/deps/libnum_rational-24d1bde2d9c2ffa9.rlib" "/opt/crater/target/debug/deps/libnum_bigint-083518c6c92e6fd4.rlib" "/opt/crater/target/debug/deps/librand-491943e98e6e4ec0.rlib" "/opt/crater/target/debug/deps/libnum_iter-780754baadb0392d.rlib" "/opt/crater/target/debug/deps/libnum_integer-69f6c7b7e7338d34.rlib" "/opt/crater/target/debug/deps/libnum_complex-f7fee3b1865ca81e.rlib" "/opt/crater/target/debug/deps/librustc_serialize-cc29b8ffd74fbfca.rlib" "/opt/crater/target/debug/deps/libenum_primitive-5a5adcb2f56b5a51.rlib" "/opt/crater/target/debug/deps/libnum_traits-f61046fd467736a9.rlib" "/opt/crater/target/debug/deps/libbitflags-70a7e6d2f9d4aa58.rlib" "/opt/crater/target/debug/deps/libfailure-b8412e95192dcdcc.rlib" "/opt/crater/target/debug/deps/libbacktrace-2c7f6fe35f2eafd3.rlib" "/opt/crater/target/debug/deps/libbacktrace_sys-df9b6438569e9d9d.rlib" "/opt/crater/target/debug/deps/librustc_demangle-89dc169db47dd685.rlib" "/opt/crater/target/debug/deps/libcfg_if-d2f9aadfe21168ff.rlib" "/opt/crater/target/debug/deps/liblibc-8f6d2a92b9de74ec.rlib" "/opt/crater/target/debug/deps/libfutures-3661a280aa742451.rlib" "/opt/crater/target/debug/deps/libnum_traits-6ee04903fe0bc7d4.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" "-lOpenCL" "-lOpenCL" "-lutil" "-lutil" "-ldl" "-lrt" "-lpthread" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-lutil"
[INFO] [stderr]   = note: /usr/bin/ld: cannot find -lOpenCL
[INFO] [stderr]           /usr/bin/ld: cannot find -lOpenCL
[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 `rust_learning`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "3e016a1954e402a3117c12d7404149e75eea27773d9cd3090f352e1bcb064841"`
[INFO] running `"docker" "rm" "-f" "3e016a1954e402a3117c12d7404149e75eea27773d9cd3090f352e1bcb064841"`
[INFO] [stdout] 3e016a1954e402a3117c12d7404149e75eea27773d9cd3090f352e1bcb064841