>>> slirp 4.3.1 Downloading
--2020-11-11 05:53:27--  https://gitlab.freedesktop.org/slirp/libslirp/-/archive/v4.3.1/libslirp-v4.3.1.tar.bz2
Resolving gitlab.freedesktop.org (gitlab.freedesktop.org)... 35.227.58.183
Connecting to gitlab.freedesktop.org (gitlab.freedesktop.org)|35.227.58.183|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [application/octet-stream]
Saving to: '/home/buildroot/autobuild/run/instance-2/output-1/build/.libslirp-v4.3.1.tar.bz2.R89zDB/output'

     0K .......... .......... .......... .......... ..........  255K
    50K .......... .......... .......... .......... ....        450K=0.3s

2020-11-11 05:53:30 (321 KB/s) - '/home/buildroot/autobuild/run/instance-2/output-1/build/.libslirp-v4.3.1.tar.bz2.R89zDB/output' saved [97234]

libslirp-v4.3.1.tar.bz2: OK (sha256: 6b1641f04d41bc45f94018ac8d42d3c9f3ba0e463cbeacf5f26fe83fc050161e)
>>> slirp 4.3.1 Extracting
bzcat /home/buildroot/autobuild/run/instance-2/dl/slirp/libslirp-v4.3.1.tar.bz2 | tar --strip-components=1 -C /home/buildroot/autobuild/run/instance-2/output-1/build/slirp-4.3.1   -xf -
>>> slirp 4.3.1 Patching
>>> slirp 4.3.1 Configuring
rm -rf /home/buildroot/autobuild/run/instance-2/output-1/build/slirp-4.3.1//build
mkdir -p /home/buildroot/autobuild/run/instance-2/output-1/build/slirp-4.3.1//build
sed -e 's%@TARGET_CROSS@%/home/buildroot/autobuild/run/instance-2/output-1/host/bin/riscv64-linux-%g' -e 's%@TARGET_ARCH@%riscv64%g' -e 's%@TARGET_CPU@%%g' -e 's%@TARGET_ENDIAN@%little%g' -e "s%@TARGET_CFLAGS@%'-D_LARGEFILE_SOURCE', '-D_LARGEFILE64_SOURCE', '-D_FILE_OFFSET_BITS=64', '-Os'%g" -e "s%@TARGET_LDFLAGS@%%g" -e "s%@TARGET_CXXFLAGS@%'-D_LARGEFILE_SOURCE', '-D_LARGEFILE64_SOURCE', '-D_FILE_OFFSET_BITS=64', '-Os'%g" -e 's%@HOST_DIR@%/home/buildroot/autobuild/run/instance-2/output-1/host%g' -e 's%@STAGING_DIR@%/home/buildroot/autobuild/run/instance-2/output-1/host/riscv64-buildroot-linux-musl/sysroot%g' -e 's%@STATIC@%false%g' -e "/^\[binaries\]$/s:$::" -e "/^\[properties\]$/s:$::" package/meson/cross-compilation.conf.in > /home/buildroot/autobuild/run/instance-2/output-1/build/slirp-4.3.1//build/cross-compilation.conf
PATH="/home/buildroot/autobuild/run/instance-2/output-1/host/bin:/home/buildroot/autobuild/run/instance-2/output-1/host/sbin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games"  PYTHONNOUSERSITE=y /home/buildroot/autobuild/run/instance-2/output-1/host/bin/meson --prefix=/usr --libdir=lib --default-library=shared --buildtype=release --cross-file=/home/buildroot/autobuild/run/instance-2/output-1/build/slirp-4.3.1//build/cross-compilation.conf -Dbuild.pkg_config_path=/home/buildroot/autobuild/run/instance-2/output-1/host/lib/pkgconfig  /home/buildroot/autobuild/run/instance-2/output-1/build/slirp-4.3.1/ /home/buildroot/autobuild/run/instance-2/output-1/build/slirp-4.3.1//build
The Meson build system
Version: 0.55.3
Source dir: /home/buildroot/autobuild/run/instance-2/output-1/build/slirp-4.3.1
Build dir: /home/buildroot/autobuild/run/instance-2/output-1/build/slirp-4.3.1/build
Build type: cross build
Project name: libslirp
Project version: UNKNOWN
C compiler for the build machine: cc (gcc 4.8.2 "cc (Ubuntu 4.8.2-19ubuntu1) 4.8.2")
C linker for the build machine: cc ld.bfd 2.24
C compiler for the host machine: /home/buildroot/autobuild/run/instance-2/output-1/host/bin/riscv64-linux-gcc (gcc 9.2.0 "riscv64-linux-gcc.br_real (Buildroot 2020.02) 9.2.0")
C linker for the host machine: /home/buildroot/autobuild/run/instance-2/output-1/host/bin/riscv64-linux-gcc ld.bfd 2.32
Build machine cpu family: x86_64
Build machine cpu: x86_64
Host machine cpu family: riscv64
Host machine cpu: 
Target machine cpu family: riscv64
Target machine cpu: 
Program build-aux/meson-dist found: YES (/home/buildroot/autobuild/run/instance-2/output-1/build/slirp-4.3.1/build-aux/meson-dist)

../output-1/build/slirp-4.3.1/meson.build:13:0: ERROR: Index 1 out of bounds of array of size 1.

A full log can be found at /home/buildroot/autobuild/run/instance-2/output-1/build/slirp-4.3.1/build/meson-logs/meson-log.txt
make: *** [/home/buildroot/autobuild/run/instance-2/output-1/build/slirp-4.3.1/.stamp_configured] Error 1
make: Leaving directory `/home/buildroot/autobuild/run/instance-2/buildroot'