INDEX build failed for 11.x

[Ports Index build]

INDEX build failed with errors:
Generating INDEX-11 - please wait..--- describe.accessibility ---
--- describe.arabic ---
--- describe.archivers ---
--- describe.astro ---
--- describe.audio ---
--- describe.benchmarks ---
--- describe.biology ---
--- describe.cad ---
--- describe.chinese ---
--- describe.comms ---
--- describe.converters ---
--- describe.databases ---
--- describe.deskutils ---
--- describe.devel ---
--- describe.dns ---
--- describe.editors ---
--- describe.emulators ---
--- describe.finance ---
--- describe.french ---
--- describe.ftp ---
[...]
--- describe.print ---
--- describe.russian ---
--- describe.science ---
--- describe.security ---
--- describe.shells ---
make[5]: "/home/indexbuild/tindex/ports/shells/ksh93/Makefile" line 16: Malformed conditional (${USE_GCC} == "9")
make[5]: Fatal errors encountered -- cannot continue===> shells/ksh93 failed
*** [describe.shells] Error code 1

make[2]: stopped in /home/indexbuild/tindex/ports

make[2]: stopped in /home/indexbuild/tindex/ports
*** Error code 1

Stop.
make[1]: stopped in /home/indexbuild/tindex/ports
*** Error code 1

Stop.
make: stopped in /home/indexbuild/tindex/ports
1 error

Committers on the hook:
 cy glewis 

Most recent SVN update was:
Updating '.':
U    sysutils/cfengine-devel/Makefile
U    sysutils/cfengine-devel/distinfo
U    security/krb5-devel/Makefile
U    security/krb5-devel/distinfo
U    shells/ksh93-devel/Makefile
U    shells/ksh93-devel/distinfo
U    shells/ksh93/Makefile
U    java/openjdk8/Makefile
A    java/openjdk8/files/patch-hotspot_src_os__cpu_bsd__x86_vm_os__bsd__x86.cpp
Updated to revision 508708.