Failed assertion in buildworld on armv7

A Pi2 (armv7) self-hosting -current is failing buildworld with
...
Building /usr/obj/usr/src/arm.armv7/lib/clang/libllvm/Target/ARM/ARMMachineFunctionInfo.pico
<jemalloc>: /usr/src/contrib/jemalloc/include/jemalloc/internal/ehooks.h:184: Failed assertion: "p[i * (size / sizeof(size_t) / nchecks)] == 0"
PLEASE submit a bug report to https://bugs.freebsd.org/submit/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.      Program arguments: c++ -target armv7-gnueabihf-freebsd16.0 --sysroot=/usr/obj/usr/src/arm.armv7/tmp -B/usr/obj/usr/src/arm.armv7/tmp/usr/bin -fpic -DPIC -UPIC -O2 -pipe -fno-common -I/usr/obj/usr/src/arm.armv7/lib/clang/libllvm -I/usr/src/sys/contrib/zstd/lib -I/usr/src/contrib/llvm-project/llvm/lib/Target/AArch64 -I/usr/src/contrib/llvm-project/llvm/lib/Target/ARM -I/usr/src/contrib/llvm-project/llvm/lib/Target/PowerPC -I/usr/src/contrib/llvm-project/llvm/lib/Target/RISCV -I/usr/src/contrib/llvm-project/llvm/lib/Target/X86 -I/usr/src/contrib/llvm-project/llvm/lib/ObjCopy -DBLAKE3_NO_AVX512 -DBLAKE3_NO_AVX2 -DBLAKE3_NO_SSE41 -DBLAKE3_NO_SSE2 -DBLAKE3_USE_NEON=0 -I/usr/src/lib/clang/include -I/usr/src/contrib/llvm-project/llvm/include -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -DHAVE_VCS_VERSION_INC -DLLVM_DEFAULT_TARGET_TRIPLE=\"armv7-unknown-freebsd16.0-gnueabihf\" -DLLVM_HOST_TRIPLE=\"armv7-unknown-freebsd16.0\" -DDEFAULT_SYSROOT=\"\" -DLLVM_TARGET_ENABLE_AARCH64 -DLLVM_TARGET_ENABLE_ARM -DLLVM_TARGET_ENABLE_POWERPC -DLLVM_TARGET_ENABLE_RISCV -DLLVM_TARGET_ENABLE_X86 -DLLVM_NATIVE_ASMPARSER=LLVMInitializeARMAsmParser -DLLVM_NATIVE_ASMPRINTER=LLVMInitializeARMAsmPrinter -DLLVM_NATIVE_DISASSEMBLER=LLVMInitializeARMDisassembler -DLLVM_NATIVE_TARGET=LLVMInitializeARMTarget -DLLVM_NATIVE_TARGETINFO=LLVMInitializeARMTargetInfo -DLLVM_NATIVE_TARGETMC=LLVMInitializeARMTargetMC -ffunction-sections -fdata-sections -gline-tables-only -Wno-format-zero-length -fstack-pro

...


The host reports
root@www:/usr/src # uname -a
FreeBSD www.zefox.org 15.0-PRERELEASE FreeBSD 15.0-PRERELEASE #104 main-n280063-d3462294c1f0: Fri Sep  5 03:42:52 PDT 2025     bob@www.zefox.org:/usr/obj/usr/src/arm.armv7/sys/GENERIC arm

A subsequent git pull notes:
 lib/libc/gen/Makefile.inc                          |    1 +
 lib/libc/gen/Symbol.map                            |    1 +
 lib/libc/gen/directory.3                           |   51 +-
 lib/libc/gen/gen-compat.h                          |    1 -
 lib/libc/gen/gen-private.h                         |    3 +
 lib/libc/gen/readdir-compat11.c                    |    2 +-
 lib/libc/gen/readdir.c                             |    8 +-

Buildworld has been restarted, if other measures should be taken
please let me know.

Thanks for reading,

bob prohaska