java/openjdk6: [build] Segmentation fault gmake[4]: Leaving directory `/usr/ports/java/openjdk6/work/langtools/make'

Port java/openjdk6 fails unexpectedly from building with a segmentation
fault.

I already built the port with portmaster -f java/openjdk6 to ensure
building all necessary ports, but it doesn't help.

System is:

10.0-ALPHA2 FreeBSD 10.0-ALPHA2 #0 r255817: Mon Sep 23 18:35:39 CEST
2013 amd64

No converters/libiconv 
No libstdc++

Any ideas?

The port is a stopper for updating other ports which are still in the
queue after for being updated due to the libiconv issue on that
specific box.


Oliver

[...]
build-bootstrap-javac:
    [mkdir] Created
dir: /usr/ports/java/openjdk6/work/build/bsd-amd64/langtools/build/bootstrap/gensrc
[mkdir] Created
dir: /usr/ports/java/openjdk6/work/build/bsd-amd64/langtools/build/bootstrap/classes
[pcompile] Generating 7 resource files
to /usr/ports/java/openjdk6/work/build/bsd-amd64/langtools/build/bootstrap/gensrc
[copy] Copying 1 file
to /usr/ports/java/openjdk6/work/build/bsd-amd64/langtools/build/bootstrap/gensrc
[pcompile] Generating 1 resource files
to /usr/ports/java/openjdk6/work/build/bsd-amd64/langtools/build/bootstrap/gensrc
[javac] Compiling 8 source files
to /usr/ports/java/openjdk6/work/build/bsd-amd64/langtools/build/bootstrap/classes
gmake[4]: *** [build] Segmentation fault gmake[4]: Leaving directory
`/usr/ports/java/openjdk6/work/langtools/make' gmake[3]: ***
[langtools-build] Error 2 gmake[3]: Leaving directory
`/usr/ports/java/openjdk6/work' gmake[2]: *** [build_product_image]
Error 2 gmake[2]: Leaving directory `/usr/ports/java/openjdk6/work'
===> Compilation failed unexpectedly. Try to set MAKE_JOBS_UNSAFE=yes
and rebuild before reporting the failure to the maintainer. *** Error
code 1