Description of problem:
Package cjdns fails to build from source in Fedora rawhide.

Version-Release number of selected component (if applicable):
21-3.fc34

Steps to Reproduce:
koji build --scratch f34 cjdns-21-3.fc34.src.rpm

Additional info:
This package is tracked by Koschei. See:
https://koschei.fedoraproject.org/package/cjdns

Total build time: 45403ms.
/builddir/build/BUILD/cjdns-cjdns-v21/node_build/builder.js:503
            if (err) { throw err; }
                       ^

Error: gcc -c -x cpp-output -o build_linux/tunnel_IpTunnel_c.o -std=c99 -Wall -Wextra -Werror -Wno-pointer-sign -Wmissing-prototypes -pedantic -D linux=1 -D CJD_PACKAGE_VERSION="cjdns-21-3.fc34" -Wno-unused-parameter -fomit-frame-pointer -D Log_DEBUG -g -D NumberCompress_TYPE=v3x5x8 -D Identity_CHECK=1 -D Allocator_USE_CANARIES=1 -D PARANOIA=1 -mtune=generic -DHAS_ETH_INTERFACE=1 -fPIE -fdiagnostics-color=always -O3 -D_FORTIFY_SOURCE=2 -fno-stack-protector -fstack-protector-all -Wstack-protector build_linux/tunnel_IpTunnel_c.o.i

In function '[01m[KfindConnection[m[K',
    inlined from '[01m[KincomingFromTun[m[K' at [01m[Ktunnel/IpTunnel.c:708:16[m[K:
[01m[Ktunnel/IpTunnel.c:685:33:[m[K [01;31m[Kerror: [m[K'[01m[KisValidAddress6[m[K' accessing 32 bytes in a region of size 16 [[01;31m[K-Werror=stringop-overflow=[m[K]
  685 |         if (sourceAndDestIp6 && [01;31m[KisValidAddress6(sourceAndDestIp6, isFromTun, conn)[m[K) {
      |                                 [01;31m[K^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~[m[K
[01m[Ktunnel/IpTunnel.c:[m[K In function '[01m[KincomingFromTun[m[K':
[01m[Ktunnel/IpTunnel.c:685:33:[m[K [01;36m[Knote: [m[Kreferencing argument 1 of type '[01m[Kuint8_t *[m[K' {aka '[01m[Kunsigned char *[m[K'}
[01m[Ktunnel/IpTunnel.c:664:12:[m[K [01;36m[Knote: [m[Kin a call to function '[01m[KisValidAddress6[m[K'
  664 | static bool[01;36m[K isValidAddress[m[K6(uint8_t sourceAndDestIp6[32],
      |            [01;36m[K^~~~~~~~~~~~~~~[m[K
In function '[01m[Kip6FromNode[m[K',
    inlined from '[01m[KincomingFromNode[m[K' at [01m[Ktunnel/IpTunnel.c:795:16[m[K:
[01m[Ktunnel/IpTunnel.c:737:10:[m[K [01;31m[Kerror: [m[K'[01m[KisValidAddress6[m[K' accessing 32 bytes in a region of size 16 [[01;31m[K-Werror=stringop-overflow=[m[K]
  737 |     if (!isValidAddress6(header->sourceAddr, false, conn)) {
[01m[Ktunnel/IpTunnel.c:[m[K In function '[01m[KincomingFromNode[m[K':
[01m[Ktunnel/IpTunnel.c:737:10:[m[K [01;36m[Knote: [m[Kreferencing argument 1 of type '[01m[Kuint8_t *[m[K' {aka '[01m[Kunsigned char *[m[K'}
[01m[Ktunnel/IpTunnel.c:664:12:[m[K [01;36m[Knote: [m[Kin a call to function '[01m[KisValidAddress6[m[K'
  664 | static bool[01;36m[K isValidAddress[m[K6(uint8_t sourceAndDestIp6[32],
      |            [01;36m[K^~~~~~~~~~~~~~~[m[K
cc1: all warnings being treated as errors

    at error (/builddir/build/BUILD/cjdns-cjdns-v21/node_build/builder.js:53:15)
    at /builddir/build/BUILD/cjdns-cjdns-v21/node_build/builder.js:125:22
    at /builddir/build/BUILD/cjdns-cjdns-v21/node_build/builder.js:95:13
    at ChildProcess.<anonymous> (/builddir/build/BUILD/cjdns-cjdns-v21/tools/lib/Semaphore.js:7:30)
    at ChildProcess.emit (events.js:315:20)
    at maybeClose (internal/child_process.js:1048:16)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:288:5)
error: Bad exit status from /var/tmp/rpm-tmp.9QXUbw (%build)