Compiling tracing-core v0.1.17
   Compiling thread_local v1.0.1
   Compiling sharded-slab v0.1.1
   Compiling crossbeam-utils v0.7.2
   Compiling memoffset v0.5.5
   Compiling crossbeam-epoch v0.8.2
   Compiling lock_api v0.4.1
   Compiling unicase v2.6.0
   Compiling itertools v0.9.0
   Compiling minifier v0.0.39
   Compiling quote v1.0.7
   Compiling aho-corasick v0.7.13
   Compiling parking_lot_core v0.8.3
   Compiling num_cpus v1.13.0
   Compiling atty v0.2.14
   Compiling regex-automata v0.1.9
   Compiling tracing-log v0.1.2
   Compiling crossbeam-queue v0.2.3
   Compiling rand_core v0.6.2
   Compiling parking_lot v0.11.1
   Compiling regex v1.4.3
   Compiling matchers v0.0.1
   Compiling crossbeam-deque v0.7.3
   Compiling rand_chacha v0.3.0
   Compiling rand v0.8.3
   Compiling rustc-rayon v0.3.1
   Compiling tempfile v3.2.0
   Compiling tracing-attributes v0.1.13
   Compiling tracing v0.1.25
   Compiling tracing-subscriber v0.2.16
   Compiling tracing-tree v0.1.9
   Compiling rustdoc-json-types v0.1.0 (/builddir/build/BUILD/rustc-1.53.0-src/src/rustdoc-json-types)
   Compiling rustdoc v0.0.0 (/builddir/build/BUILD/rustc-1.53.0-src/src/librustdoc)
   Compiling rustdoc-tool v0.0.0 (/builddir/build/BUILD/rustc-1.53.0-src/src/tools/rustdoc)
    Finished release [optimized] target(s) in 22m 20s
Building stage2 tool rustfmt (riscv64gc-unknown-linux-gnu)
   Compiling cc v1.0.60
   Compiling libz-sys v1.1.2
   Compiling rustc-workspace-hack v1.0.0 (/builddir/build/BUILD/rustc-1.53.0-src/src/tools/rustc-workspace-hack)
   Compiling rustfmt-nightly v1.4.37 (/builddir/build/BUILD/rustc-1.53.0-src/src/tools/rustfmt)
    Finished release [optimized] target(s) in 8m 36s
Build completed successfully in 8:12:29
+ python3 ./x.py doc --stage 2
    Finished dev [unoptimized + debuginfo] target(s) in 2.85s
Generating unstable book md files (riscv64gc-unknown-linux-gnu)
Building stage0 tool unstable-book-gen (riscv64gc-unknown-linux-gnu)
   Compiling proc-macro2 v1.0.24
   Compiling unicode-xid v0.2.1
   Compiling syn v1.0.65
   Compiling serde_derive v1.0.125
command did not execute successfully: "/usr/bin/cargo" "build" "--target" "riscv64gc-unknown-linux-gnu" "-Zbinary-dep-depinfo" "-j" "4" "--release" "--frozen" "--manifest-path" "/builddir/build/BUILD/rustc-1.53.0-src/src/tools/unstable-book-gen/Cargo.toml" "--message-format" "json-render-diagnostics"
expected success, got: signal: 11 (core dumped)
failed to run: /builddir/build/BUILD/rustc-1.53.0-src/build/bootstrap/debug/bootstrap doc --stage 2
Build completed unsuccessfully in 0:00:10
error: Bad exit status from /var/tmp/rpm-tmp.Ury22w (%build)
    Bad exit status from /var/tmp/rpm-tmp.Ury22w (%build)
RPM build errors:
Child return code was: 1
EXCEPTION: [Error()]
Traceback (most recent call last):
  File "/usr/lib/python3.9/site-packages/mockbuild/trace_decorator.py", line 93, in trace
    result = func(*args, **kw)
  File "/usr/lib/python3.9/site-packages/mockbuild/util.py", line 600, in do_with_status
    raise exception.Error("Command failed: \n # %s\n%s" % (command, output), child.returncode)
mockbuild.exception.Error: Command failed: 
 # /usr/bin/systemd-nspawn -q -M 17c2284de2e947919e0c21a9469c1f51 -D /var/lib/mock/f33-build-631827-67644/root -a -u mockbuild --capability=cap_ipc_lock --bind=/tmp/mock-resolv.3_ldgg70:/etc/resolv.conf --bind=/dev/btrfs-control --bind=/dev/loop-control --bind=/dev/loop0 --bind=/dev/loop1 --bind=/dev/loop2 --bind=/dev/loop3 --bind=/dev/loop4 --bind=/dev/loop5 --bind=/dev/loop6 --bind=/dev/loop7 --bind=/dev/loop8 --bind=/dev/loop9 --bind=/dev/loop10 --bind=/dev/loop11 --console=pipe --setenv=TERM=vt100 --setenv=SHELL=/bin/bash --setenv=HOME=/builddir --setenv=HOSTNAME=mock --setenv=PATH=/usr/bin:/bin:/usr/sbin:/sbin --setenv=PROMPT_COMMAND=printf "\033]0;<mock-chroot>\007" --setenv=PS1=<mock-chroot> \s-\v\$  --setenv=LANG=C.UTF-8 --resolv-conf=off bash --login -c /usr/bin/rpmbuild -bb --target riscv64 --nodeps /builddir/build/SPECS/rust.spec