[INFO] updating cached repository haedaal/rmacro
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/haedaal/rmacro
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/haedaal/rmacro" "work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/haedaal/rmacro"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/haedaal/rmacro'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/haedaal/rmacro" "work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/haedaal/rmacro"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/haedaal/rmacro'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] acfdfeefc5129160b27375771b4e4537e383dc66
[INFO] sha for GitHub repo haedaal/rmacro: acfdfeefc5129160b27375771b4e4537e383dc66
[INFO] validating manifest of haedaal/rmacro on toolchain master#452087b4bf18cece2d52d7cd8c9147195e5404bf
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of haedaal/rmacro on toolchain try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing haedaal/rmacro
[INFO] finished frobbing haedaal/rmacro
[INFO] frobbed toml for haedaal/rmacro written to work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/haedaal/rmacro/Cargo.toml
[INFO] started frobbing haedaal/rmacro
[INFO] finished frobbing haedaal/rmacro
[INFO] frobbed toml for haedaal/rmacro written to work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/haedaal/rmacro/Cargo.toml
[INFO] crate haedaal/rmacro already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking haedaal/rmacro against try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab for pr-63247
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63247/worker-5/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/haedaal/rmacro:/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=forbid" "-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" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] a2a4468bb6ff88962c4c326faee9c26848fb2923c1a548e1e342269bc7c72276
[INFO] running `"docker" "start" "-a" "a2a4468bb6ff88962c4c326faee9c26848fb2923c1a548e1e342269bc7c72276"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.29
[INFO] [stderr]     Checking quote v0.6.12
[INFO] [stderr]     Checking syn v0.15.33
[INFO] [stderr]    Compiling rmacro v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::io::Write`
[INFO] [stderr]  --> build.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::Write;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dst`
[INFO] [stderr]  --> build.rs:6:13
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut dst = File::create(Path::new(".").join("tests.py")).unwrap();
[INFO] [stderr]   |             ^^^ help: consider prefixing with an underscore: `_dst`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> build.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut dst = File::create(Path::new(".").join("tests.py")).unwrap();
[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: failed to run custom build command for `rmacro v0.1.0 (/opt/crater/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/crater/target/debug/build/rmacro-d6d75701f75e92db/build-script-build` (exit code: 101)
[INFO] [stderr] --- stderr
[INFO] [stderr] thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: Other, message: "Read-only file system" }', src/libcore/result.rs:1084:5
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x5572d3c672ab - backtrace::backtrace::libunwind::trace::h098b67cd5ecf24d4
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/libunwind.rs:88
[INFO] [stderr]    1:     0x5572d3c672ab - backtrace::backtrace::trace_unsynchronized::h41f8ecb0b6b75123
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x5572d3c672ab - std::sys_common::backtrace::_print::h6bdd5779472ab8c6
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:47
[INFO] [stderr]    3:     0x5572d3c672ab - std::sys_common::backtrace::print::h535418cbcfd3b064
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:36
[INFO] [stderr]    4:     0x5572d3c672ab - std::panicking::default_hook::{{closure}}::h8962ad5cd6daeea4
[INFO] [stderr]                                at src/libstd/panicking.rs:200
[INFO] [stderr]    5:     0x5572d3c66f86 - std::panicking::default_hook::h39b428958abf2606
[INFO] [stderr]                                at src/libstd/panicking.rs:214
[INFO] [stderr]    6:     0x5572d3c6796d - std::panicking::rust_panic_with_hook::hec5b145cd2b2dbe3
[INFO] [stderr]                                at src/libstd/panicking.rs:477
[INFO] [stderr]    7:     0x5572d3c674f2 - std::panicking::continue_panic_fmt::h499883e21d98c9ea
[INFO] [stderr]                                at src/libstd/panicking.rs:384
[INFO] [stderr]    8:     0x5572d3c673d6 - rust_begin_unwind
[INFO] [stderr]                                at src/libstd/panicking.rs:311
[INFO] [stderr]    9:     0x5572d3c7bc4d - core::panicking::panic_fmt::hf925eb7f761dd347
[INFO] [stderr]                                at src/libcore/panicking.rs:85
[INFO] [stderr]   10:     0x5572d3c7bd47 - core::result::unwrap_failed::hb295cb62d0c5f00c
[INFO] [stderr]                                at src/libcore/result.rs:1084
[INFO] [stderr]   11:     0x5572d3c5e920 - core::result::Result<T,E>::unwrap::h44b14203b984ff8c
[INFO] [stderr]                                at /rustc/757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/src/libcore/result.rs:852
[INFO] [stderr]   12:     0x5572d3c5dda5 - build_script_build::main::he5fe51ebfb93667d
[INFO] [stderr]                                at /opt/crater/workdir/build.rs:6
[INFO] [stderr]   13:     0x5572d3c5e730 - std::rt::lang_start::{{closure}}::h812e99c712eb7e13
[INFO] [stderr]                                at /rustc/757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/src/libstd/rt.rs:64
[INFO] [stderr]   14:     0x5572d3c673c3 - std::rt::lang_start_internal::{{closure}}::h1d5b2f63d8aab9e2
[INFO] [stderr]                                at src/libstd/rt.rs:49
[INFO] [stderr]   15:     0x5572d3c673c3 - std::panicking::try::do_call::h23b1282500223f6a
[INFO] [stderr]                                at src/libstd/panicking.rs:296
[INFO] [stderr]   16:     0x5572d3c6948a - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:80
[INFO] [stderr]   17:     0x5572d3c67e7d - std::panicking::try::hf851d9cd2a46569f
[INFO] [stderr]                                at src/libstd/panicking.rs:275
[INFO] [stderr]   18:     0x5572d3c67e7d - std::panic::catch_unwind::h38ad47fd47b8a319
[INFO] [stderr]                                at src/libstd/panic.rs:394
[INFO] [stderr]   19:     0x5572d3c67e7d - std::rt::lang_start_internal::h8489a7c3e11328c4
[INFO] [stderr]                                at src/libstd/rt.rs:48
[INFO] [stderr]   20:     0x5572d3c5e709 - std::rt::lang_start::h3264b1de9a5f9048
[INFO] [stderr]                                at /rustc/757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/src/libstd/rt.rs:64
[INFO] [stderr]   21:     0x5572d3c5e02a - main
[INFO] [stderr]   22:     0x7f9be638a2e1 - __libc_start_main
[INFO] [stderr]   23:     0x5572d3c5dc1a - _start
[INFO] [stderr]   24:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] running `"docker" "inspect" "a2a4468bb6ff88962c4c326faee9c26848fb2923c1a548e1e342269bc7c72276"`
[INFO] running `"docker" "rm" "-f" "a2a4468bb6ff88962c4c326faee9c26848fb2923c1a548e1e342269bc7c72276"`
[INFO] [stdout] a2a4468bb6ff88962c4c326faee9c26848fb2923c1a548e1e342269bc7c72276