Problem building kernel 5.9 rc6 from src.rpm when perf enabled, looks to be a script error, a typo

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Hi,

When building the kernel with perf enabled from the src.rpm
kernel-5.9.0-0.rc6.20200925git171d4ff79f96.17.fc34.src.rpm
I get an error.  There seems to be an error in one of the build
scripts.  This was not a problem in src.rpm for
kernel-5.9.0-0.rc4.20200911git581cb3a26baf.8.fc34.src.rpm

The error seems to be in a script, and looks like a typo,
+ +# perf
/var/tmp/rpm-tmp.bbuLwN: line 499: +#: command not found
error: Bad exit status from /var/tmp/rpm-tmp.bbuLwN (%build)
    Bad exit status from /var/tmp/rpm-tmp.bbuLwN (%build)

When I look in that temporary file, I find this, with the error line
marked by <<<<<<---- error:

###
# DO it...
###

# prepare directories
rm -rf $RPM_BUILD_ROOT
mkdir -p $RPM_BUILD_ROOT/boot
mkdir -p $RPM_BUILD_ROOT/usr/libexec

cd linux-5.9.0-0.rc6.20200925git171d4ff79f96.17.20200927.fc31.x86_64





BuildKernel bzImage arch/x86/boot/bzImage 1

+# perf                                           <<<<<<<<---- error
# make sure check-headers.sh is executable
chmod +x tools/perf/check-headers.sh

  /usr/bin/make -s EXTRA_CFLAGS="${RPM_OPT_FLAGS}"
  LDFLAGS="-Wl,-z,relro -Wl,--as-needed  -Wl,-z,now
  -specs=/usr/lib/rpm/redhat/redhat-hardened-ld"  -C tools/perf V=1
  NO_PERF_READ_VDSO32=1 NO_PERF_READ_VDSOX32=1 WERROR=0 NO_LIBUNWIND=1
  HAVE_CPLUS_DEMANGLE=1 NO_GTK2=1 NO_STRLCPY=1 NO_BIONIC=1 prefix=/usr
  PYTHON=/usr/bin/python3 DESTDIR=$RPM_BUILD_ROOT all


I don't know where that script comes from so I haven't corrected it and
run again, but when I turn off perf, the kernel builds and runs just
fine.

Thanks for any insight.
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