A head buildworld race visible in the ci.freebsd.org build history

In watching ci.freebsd.org builds I've seen a notable
number of one time failures, such as (example from
powerpc64):

--- all_subdir_lib/libufs ---
ranlib -D libufs.a
ranlib: fatal: Failed to open 'libufs.a'
*** [libufs.a] Error code 70

where the next build works despite the change being
irrelevant to whatever ranlib complained about.

Other builds failed similarly:

--- all_subdir_lib/libbsm ---
ranlib -D libbsm_p.a
ranlib: fatal: Failed to open 'libbsm_p.a'
*** [libbsm_p.a] Error code 70

and:

--- kerberos5/lib__L ---
ranlib -D libgssapi_spnego_p.a
--- libgssapi_spnego.a ---
ranlib -D libgssapi_spnego.a
--- libgssapi_spnego_p.a ---
ranlib: fatal: Failed to open 'libgssapi_spnego_p.a'
*** [libgssapi_spnego_p.a] Error code 70

and so on.


It is not limited to powerpc64. For example, for aarch64
there are:

--- libpam_exec.a ---
building static pam_exec library
ar -crD libpam_exec.a `NM='nm' NMFLAGS=''  lorder pam_exec.o  | tsort -q` 
ranlib -D libpam_exec.a
ranlib: fatal: Failed to open 'libpam_exec.a'
*** [libpam_exec.a] Error code 70

and:

--- all_subdir_lib/libusb ---
ranlib -D libusb.a
ranlib: fatal: Failed to open 'libusb.a'
*** [libusb.a] Error code 70

and:

--- all_subdir_lib/libbsnmp ---
ranlib: fatal: Failed to open 'libbsnmp.a'
--- all_subdir_lib/ncurses ---
--- all_subdir_lib/ncurses/panelw ---
--- panel.pico ---
--- all_subdir_lib/libbsnmp ---
*** [libbsnmp.a] Error code 70


Even amd64 gets such:

--- libpcap.a ---
ranlib -D libpcap.a
ranlib: fatal: Failed to open 'libpcap.a'
*** [libpcap.a] Error code 70

and:


--- libkafs5.a ---
ranlib: fatal: Failed to open 'libkafs5.a'
--- libkafs5_p.a ---
ranlib: fatal: Failed to open 'libkafs5_p.a'
--- cddl/lib__L ---
/usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/lua/lbaselib.c:60:26: note: include the header <ctype.h> or explicitly provide a declaration for 'toupper'
--- kerberos5/lib__L ---
*** [libkafs5_p.a] Error code 70

make[5]: stopped in /usr/src/kerberos5/lib/libkafs5
--- libkafs5.a ---
*** [libkafs5.a] Error code 70

and:


--- lib__L ---
ranlib -D libclang_rt.asan_cxx-i386.a
ranlib: fatal: Failed to open 'libclang_rt.asan_cxx-i386.a'
*** [libclang_rt.asan_cxx-i386.a] Error code 70


(Notice the variability in what .a the ranlib's fail for.)





===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)