saveconfig is dropping configurations

[Bryce Schober]

When I saveconfig after loading a modified sample containing the
following configuration, it drops the configurations for
CT_LOCAL_TARBALLS_DIR, CT_PREFIX_DIR, and CT_LIBC_GLIBC_FORCE_UNWIND.
This makes any round-tripping through menuconfig and saveconfig not
work properly.

This is on latest tip - I haven't yet tried going back in time to a
released version.

Is this a bug, or am I missing something?
<><  <><  <><
Bryce Schober


CT_EXPERIMENTAL=y
CT_LOCAL_TARBALLS_DIR="${CT_TOP_DIR}/../dl_cache"
CT_SAVE_TARBALLS=y
CT_PREFIX_DIR="${CT_TOP_DIR}/../${CT_TARGET}"
CT_USE_MIRROR=y
CT_MIRROR_BASE_URL="http://ymorin.is-a-geek.org/mirrors/"
CT_PARALLEL_JOBS=16
CT_LOG_DEBUG=y
CT_ARCH_ARCH="i686"
CT_ARCH_x86=y
CT_STATIC_TOOLCHAIN=y
CT_TARGET_VENDOR="dynon"
CT_TARGET_ALIAS="i686-linux"
CT_KERNEL_linux=y
CT_KERNEL_V_3_0=y
CT_BINUTILS_V_2_21_53=y
CT_BINUTILS_LINKER_LD_GOLD=y
CT_BINUTILS_GOLD_THREADS=y
CT_BINUTILS_LD_WRAPPER=y
CT_BINUTILS_FOR_TARGET=y
CT_CC_V_4_3_6=y
CT_CC_GCC_USE_GRAPHITE=y
CT_CC_GCC_USE_LTO=y
CT_CC_LANG_CXX=y
CT_CC_GCC_LIBMUDFLAP=y
CT_CC_GCC_LIBGOMP=y
CT_CC_GCC_LIBSSP=y
CT_LIBC_glibc=y
CT_LIBC_GLIBC_V_2_9=y
CT_LIBC_GLIBC_FORCE_UNWIND=y
CT_DEBUG_gdb=y
CT_GDB_V_7_4_1=y
CT_GMP_V_4_3_2=y
CT_MPFR_V_2_4_2=y

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