* Package:    dev-lang/rust-1.31.1
 * Repository: gentoo
 * Maintainer: rust@gentoo.org
 * USE:        abi_x86_64 amd64 cpu_flags_x86_sse2 elibc_glibc jemalloc kernel_linux llvm_targets_X86 system-llvm userland_GNU
 * FEATURES:   network-sandbox preserve-libs sandbox userpriv usersandbox
 * Checking for at least 4 GiB RAM ...
 [ ok ]
 * Checking for at least 7 GiB disk space at "/var/tmp/portage/dev-lang/rust-1.31.1/temp" ...
 [ ok ]
>>> Unpacking source...
>>> Unpacking rustc-1.31.1-src.tar.xz to /var/tmp/portage/dev-lang/rust-1.31.1/work
>>> Unpacking rust-1.30.1-x86_64-unknown-linux-gnu.tar.xz to /var/tmp/portage/dev-lang/rust-1.31.1/work
>>> Source unpacked in /var/tmp/portage/dev-lang/rust-1.31.1/work
>>> Preparing source in /var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src ...
install: creating uninstall script at /var/tmp/portage/dev-lang/rust-1.31.1/work/rust-stage0/lib/rustlib/uninstall.sh
install: installing component 'rustc'
install: installing component 'cargo'
install: installing component 'rls-preview'
install: installing component 'clippy-preview'
install: installing component 'rustfmt-preview'
install: installing component 'llvm-tools-preview'
install: installing component 'rust-analysis-x86_64-unknown-linux-gnu'
install: installing component 'rust-std-x86_64-unknown-linux-gnu'
install: installing component 'rust-docs'

    Rust is ready to roll.

 * Applying 1.30.1-clippy-sysroot.patch ...
 [ ok ]
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src ...
>>> Source configured.
>>> Compiling source in /var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src ...
   Compiling proc-macro2 v0.4.24
   Compiling unicode-xid v0.1.0
   Compiling ryu v0.2.6
   Compiling serde v1.0.75
   Compiling libc v0.2.45
   Compiling itoa v0.4.3
   Compiling cfg-if v0.1.5
   Compiling cc v1.0.25
   Compiling ordermap v0.3.5
   Compiling fixedbitset v0.1.9
   Compiling getopts v0.2.17
   Compiling lazy_static v0.2.11
   Compiling build_helper v0.1.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/build_helper)
   Compiling petgraph v0.4.13
   Compiling cmake v0.1.33
   Compiling num_cpus v1.8.0
   Compiling filetime v0.2.1
   Compiling time v0.1.40
   Compiling quote v0.6.8
   Compiling syn v0.14.9
   Compiling serde_json v1.0.31
   Compiling toml v0.4.6
   Compiling serde_derive v1.0.75
   Compiling bootstrap v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/bootstrap)
    Finished dev [unoptimized] target(s) in 42.43s
Set({"/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/liballoc", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/liballoc_jemalloc", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/liballoc_system", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libcore", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libpanic_abort", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libpanic_unwind", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_asan", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_lsan", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_msan", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_tsan", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libstd", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libunwind"}) not skipped for "compile::Std" -- not in ["src/tools/miri"]
Set({"/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libterm", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libtest"}) not skipped for "compile::Test" -- not in ["src/tools/miri"]
Set({"/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libarena", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libfmt_macros", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libgraphviz", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libproc_macro", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_allocator", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_apfloat", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_borrowck", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_codegen_utils", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_data_structures", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_driver", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_errors", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_fs_util", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_incremental", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_lint", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_metadata", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_metadata_utils", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_mir", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_passes", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_platform_intrinsics", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_plugin", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_privacy", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_resolve", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_save_analysis", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_target", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_traits", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_typeck", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libserialize", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libsyntax", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libsyntax_ext", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libsyntax_pos", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/rustc"}) not skipped for "compile::Rustc" -- not in ["src/tools/miri"]
Set({"/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_codegen_llvm", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_llvm"}) not skipped for "compile::CodegenBackend" -- not in ["src/tools/miri"]
Set({"src/tools/cargo"}) not skipped for "tool::Cargo" -- not in ["src/tools/miri"]
Set({"src/tools/rls"}) not skipped for "tool::Rls" -- not in ["src/tools/miri"]
Set({"src/tools/rustdoc"}) not skipped for "tool::Rustdoc" -- not in ["src/tools/miri"]
Set({"src/tools/clippy"}) not skipped for "tool::Clippy" -- not in ["src/tools/miri"]
Set({"src/tools/rustfmt"}) not skipped for "tool::Rustfmt" -- not in ["src/tools/miri"]
Skipping Set({"src/tools/miri"}) because it is excluded
Set({"/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/liballoc", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/liballoc_jemalloc", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/liballoc_system", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libcore", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libpanic_abort", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libpanic_unwind", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_asan", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_lsan", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_msan", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_tsan", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libstd", "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libunwind"}) not skipped for "compile::Std" -- not in ["src/tools/miri"]
Building stage0 std artifacts (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
   Compiling cc v1.0.25
   Compiling core v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libcore)
   Compiling build_helper v0.1.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/build_helper)
   Compiling unwind v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libunwind)
   Compiling compiler_builtins v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/rustc/compiler_builtins_shim)
   Compiling cmake v0.1.33
   Compiling alloc_jemalloc v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/liballoc_jemalloc)
   Compiling std v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libstd)
   Compiling rustc_asan v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_asan)
   Compiling rustc_tsan v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_tsan)
   Compiling rustc_msan v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_msan)
   Compiling rustc_lsan v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_lsan)
warning: unused attribute
    --> libcore/num/mod.rs:2155:13
     |
2155 |               #[rustc_promotable]
     |               ^^^^^^^^^^^^^^^^^^^
...
3797 | /     uint_impl! { u8, u8, 8, 255, "", "", 2, "0x82", "0xa", "0x12", "0x12", "0x48", "[0x12]",
3798 | |         "[0x12]" }
     | |__________________- in this macro invocation
     |
     = note: #[warn(unused_attributes)] on by default

warning: unused attribute
    --> libcore/num/mod.rs:2172:13
     |
2172 |               #[rustc_promotable]
     |               ^^^^^^^^^^^^^^^^^^^
...
3797 | /     uint_impl! { u8, u8, 8, 255, "", "", 2, "0x82", "0xa", "0x12", "0x12", "0x48", "[0x12]",
3798 | |         "[0x12]" }
     | |__________________- in this macro invocation

warning: unused attribute
    --> libcore/num/mod.rs:2155:13
     |
2155 |               #[rustc_promotable]
     |               ^^^^^^^^^^^^^^^^^^^
...
4324 | /     uint_impl! { u16, u16, 16, 65535, "", "", 4, "0xa003", "0x3a", "0x1234", "0x3412", "0x2c48",
4325 | |         "[0x34, 0x12]", "[0x12, 0x34]" }
     | |________________________________________- in this macro invocation

warning: unused attribute
    --> libcore/num/mod.rs:2172:13
     |
2172 |               #[rustc_promotable]
     |               ^^^^^^^^^^^^^^^^^^^
...
4324 | /     uint_impl! { u16, u16, 16, 65535, "", "", 4, "0xa003", "0x3a", "0x1234", "0x3412", "0x2c48",
4325 | |         "[0x34, 0x12]", "[0x12, 0x34]" }
     | |________________________________________- in this macro invocation

warning: unused attribute
    --> libcore/num/mod.rs:2155:13
     |
2155 |               #[rustc_promotable]
     |               ^^^^^^^^^^^^^^^^^^^
...
4330 | /     uint_impl! { u32, u32, 32, 4294967295, "", "", 8, "0x10000b3", "0xb301", "0x12345678",
4331 | |         "0x78563412", "0x1e6a2c48", "[0x78, 0x56, 0x34, 0x12]", "[0x12, 0x34, 0x56, 0x78]" }
     | |____________________________________________________________________________________________- in this macro invocation

warning: unused attribute
    --> libcore/num/mod.rs:2172:13
     |
2172 |               #[rustc_promotable]
     |               ^^^^^^^^^^^^^^^^^^^
...
4330 | /     uint_impl! { u32, u32, 32, 4294967295, "", "", 8, "0x10000b3", "0xb301", "0x12345678",
4331 | |         "0x78563412", "0x1e6a2c48", "[0x78, 0x56, 0x34, 0x12]", "[0x12, 0x34, 0x56, 0x78]" }
     | |____________________________________________________________________________________________- in this macro invocation

warning: unused attribute
    --> libcore/num/mod.rs:2155:13
     |
2155 |               #[rustc_promotable]
     |               ^^^^^^^^^^^^^^^^^^^
...
4336 | /     uint_impl! { u64, u64, 64, 18446744073709551615, "", "", 12, "0xaa00000000006e1", "0x6e10aa",
4337 | |         "0x1234567890123456", "0x5634129078563412", "0x6a2c48091e6a2c48",
4338 | |         "[0x56, 0x34, 0x12, 0x90, 0x78, 0x56, 0x34, 0x12]",
4339 | |         "[0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56]" }
     | |____________________________________________________________- in this macro invocation

warning: unused attribute
    --> libcore/num/mod.rs:2172:13
     |
2172 |               #[rustc_promotable]
     |               ^^^^^^^^^^^^^^^^^^^
...
4336 | /     uint_impl! { u64, u64, 64, 18446744073709551615, "", "", 12, "0xaa00000000006e1", "0x6e10aa",
4337 | |         "0x1234567890123456", "0x5634129078563412", "0x6a2c48091e6a2c48",
4338 | |         "[0x56, 0x34, 0x12, 0x90, 0x78, 0x56, 0x34, 0x12]",
4339 | |         "[0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56]" }
     | |____________________________________________________________- in this macro invocation

warning: unused attribute
    --> libcore/num/mod.rs:2155:13
     |
2155 |               #[rustc_promotable]
     |               ^^^^^^^^^^^^^^^^^^^
...
4344 | /     uint_impl! { u128, u128, 128, 340282366920938463463374607431768211455, "", "", 16,
4345 | |         "0x13f40000000000000000000000004f76", "0x4f7613f4", "0x12345678901234567890123456789012",
4346 | |         "0x12907856341290785634129078563412", "0x48091e6a2c48091e6a2c48091e6a2c48",
4347 | |         "[0x12, 0x90, 0x78, 0x56, 0x34, 0x12, 0x90, 0x78, \
4348 | |           0x56, 0x34, 0x12, 0x90, 0x78, 0x56, 0x34, 0x12]",
4349 | |         "[0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56, \
4350 | |           0x78, 0x90, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12]" }
     | |____________________________________________________________- in this macro invocation

warning: unused attribute
    --> libcore/num/mod.rs:2172:13
     |
2172 |               #[rustc_promotable]
     |               ^^^^^^^^^^^^^^^^^^^
...
4344 | /     uint_impl! { u128, u128, 128, 340282366920938463463374607431768211455, "", "", 16,
4345 | |         "0x13f40000000000000000000000004f76", "0x4f7613f4", "0x12345678901234567890123456789012",
4346 | |         "0x12907856341290785634129078563412", "0x48091e6a2c48091e6a2c48091e6a2c48",
4347 | |         "[0x12, 0x90, 0x78, 0x56, 0x34, 0x12, 0x90, 0x78, \
4348 | |           0x56, 0x34, 0x12, 0x90, 0x78, 0x56, 0x34, 0x12]",
4349 | |         "[0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56, \
4350 | |           0x78, 0x90, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12]" }
     | |____________________________________________________________- in this macro invocation

warning: unused attribute
    --> libcore/num/mod.rs:2155:13
     |
2155 |               #[rustc_promotable]
     |               ^^^^^^^^^^^^^^^^^^^
...
4369 | /     uint_impl! { usize, u64, 64, 18446744073709551615, "", "", 12, "0xaa00000000006e1", "0x6e10aa",
4370 | |         "0x1234567890123456", "0x5634129078563412", "0x6a2c48091e6a2c48",
4371 | |         "[0x56, 0x34, 0x12, 0x90, 0x78, 0x56, 0x34, 0x12]",
4372 | |          "[0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56]" }
     | |_____________________________________________________________- in this macro invocation

warning: unused attribute
    --> libcore/num/mod.rs:2172:13
     |
2172 |               #[rustc_promotable]
     |               ^^^^^^^^^^^^^^^^^^^
...
4369 | /     uint_impl! { usize, u64, 64, 18446744073709551615, "", "", 12, "0xaa00000000006e1", "0x6e10aa",
4370 | |         "0x1234567890123456", "0x5634129078563412", "0x6a2c48091e6a2c48",
4371 | |         "[0x56, 0x34, 0x12, 0x90, 0x78, 0x56, 0x34, 0x12]",
4372 | |          "[0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56]" }
     | |_____________________________________________________________- in this macro invocation

   Compiling libc v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/rustc/libc_shim)
   Compiling alloc v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/liballoc)
   Compiling alloc_system v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/liballoc_system)
   Compiling panic_abort v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libpanic_abort)
   Compiling panic_unwind v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libpanic_unwind)
    Finished release [optimized] target(s) in 40.79s
Copying stage0 std from stage0 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Building stage0 test artifacts (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
   Compiling getopts v0.2.17
   Compiling term v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libterm)
   Compiling test v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libtest)
    Finished release [optimized] target(s) in 7.34s
Copying stage0 test from stage0 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Building stage0 compiler artifacts (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
   Compiling version_check v0.1.5
   Compiling nodrop v0.1.12
   Compiling libc v0.2.45
   Compiling cfg-if v0.1.5
   Compiling memoffset v0.2.1
   Compiling scopeguard v0.3.3
   Compiling void v1.0.2
   Compiling rustc-rayon-core v0.1.1
   Compiling stable_deref_trait v1.1.0
   Compiling rand_core v0.2.1
   Compiling either v1.5.0
   Compiling bitflags v1.0.4
   Compiling unicode-width v0.1.5
   Compiling byteorder v1.2.3
   Compiling graphviz v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libgraphviz)
   Compiling cc v1.0.25
   Compiling rustc_target v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_target)
   Compiling scoped-tls v0.1.2
   Compiling syntax v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libsyntax)
   Compiling termcolor v1.0.2
   Compiling lazy_static v0.2.11
   Compiling rustc-demangle v0.1.9
   Compiling datafrog v0.1.0
   Compiling rustc v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc)
   Compiling remove_dir_all v0.5.1
   Compiling rustc_fs_util v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_fs_util)
   Compiling rustc_incremental v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_incremental)
   Compiling fmt_macros v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libfmt_macros)
   Compiling rustc-serialize v0.3.24
   Compiling rustc_metadata v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_metadata)
   Compiling quick-error v1.2.2
   Compiling rustc_platform_intrinsics v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_platform_intrinsics)
   Compiling rustc_driver v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_driver)
   Compiling arrayvec v0.4.7
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   Compiling lazy_static v1.1.0
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   Compiling owning_ref v0.3.3
   Compiling rustc-hash v1.0.1
   Compiling chalk-macros v0.1.0
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   Compiling humantime v1.1.1
   Compiling rustc_cratesio_shim v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_cratesio_shim)
   Compiling ena v0.9.3
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   Compiling lock_api v0.1.3
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   Compiling rustc_apfloat v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_apfloat)
   Compiling serialize v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libserialize)
   Compiling rls-data v0.18.1
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   Compiling num_cpus v1.8.0
   Compiling atty v0.2.11
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   Compiling parking_lot_core v0.3.0
   Compiling tempfile v3.0.3
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   Compiling rustc-rayon v0.1.1
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   Compiling arena v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libarena)
   Compiling syntax_pos v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libsyntax_pos)
   Compiling rustc_errors v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_errors)
   Compiling proc_macro v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libproc_macro)
   Compiling syntax_ext v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libsyntax_ext)
   Compiling rustc_mir v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_mir)
   Compiling rustc_metadata_utils v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_metadata_utils)
   Compiling rustc_typeck v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_typeck)
   Compiling rustc_traits v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_traits)
   Compiling rustc_allocator v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_allocator)
   Compiling rustc_privacy v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_privacy)
   Compiling rustc_codegen_utils v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_codegen_utils)
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   Compiling rustc_lint v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_lint)
   Compiling rustc_save_analysis v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_save_analysis)
   Compiling rustc_resolve v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_resolve)
   Compiling rustc_plugin v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_plugin)
   Compiling rustc-main v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/rustc)
    Finished release [optimized] target(s) in 9m 16s
Copying stage0 rustc from stage0 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Building stage0 codegen artifacts (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu, llvm)
   Compiling build_helper v0.1.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/build_helper)
   Compiling libc v0.2.45
   Compiling cc v1.0.25
   Compiling rustc_codegen_llvm v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_codegen_llvm)
   Compiling rustc-demangle v0.1.9
   Compiling rustc_llvm v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_llvm)
   Compiling memmap v0.6.2
   Compiling num_cpus v1.8.0
    Finished release [optimized] target(s) in 59.33s
Assembling stage1 compiler (x86_64-unknown-linux-gnu)
Building stage1 std artifacts (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
   Compiling cc v1.0.25
   Compiling core v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libcore)
   Compiling build_helper v0.1.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/build_helper)
   Compiling unwind v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libunwind)
   Compiling compiler_builtins v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/rustc/compiler_builtins_shim)
   Compiling cmake v0.1.33
   Compiling alloc_jemalloc v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/liballoc_jemalloc)
   Compiling std v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libstd)
   Compiling rustc_lsan v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_lsan)
   Compiling rustc_asan v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_asan)
   Compiling rustc_msan v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_msan)
   Compiling rustc_tsan v0.0.0 (/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/librustc_tsan)
error: Could not compile `core`.

To learn more, run the command again with --verbose.
command did not execute successfully: "/var/tmp/portage/dev-lang/rust-1.31.1/work/rust-stage0/bin/cargo" "build" "--target" "x86_64-unknown-linux-gnu" "-j" "3" "--release" "--locked" "--frozen" "--features" "panic-unwind jemalloc backtrace" "--manifest-path" "/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/src/libstd/Cargo.toml" "--message-format" "json"
expected success, got: exit code: 101
thread 'main' panicked at 'cargo must succeed', bootstrap/compile.rs:1115:9
note: Run with `RUST_BACKTRACE=1` for a backtrace.
failed to run: /var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/build/bootstrap/debug/bootstrap build --config=/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src/config.toml -j3 --exclude src/tools/miri
Build completed unsuccessfully in 0:12:16
 * ERROR: dev-lang/rust-1.31.1::gentoo failed (compile phase):
 *   (no error message)
 * 
 * Call stack:
 *     ebuild.sh, line 124:  Called src_compile
 *   environment, line 4128:  Called die
 * The specific snippet of code:
 *       env $(cat "${S}"/config.env) "${EPYTHON}" ./x.py build --config="${S}"/config.toml -j$(makeopts_jobs) --exclude src/tools/miri || die
 * 
 * If you need support, post the output of `emerge --info '=dev-lang/rust-1.31.1::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=dev-lang/rust-1.31.1::gentoo'`.
 * The complete build log is located at '/var/tmp/portage/dev-lang/rust-1.31.1/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-lang/rust-1.31.1/temp/environment'.
 * Working directory: '/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src'
 * S: '/var/tmp/portage/dev-lang/rust-1.31.1/work/rustc-1.31.1-src'