Antigravity ACP (agy_acp_server.par) TCMalloc failure on aarch64

Using “agy_acp_server.par”,
from agy-acp-server-agy_acp_server_20260818_01_RC01-linux-arm64.zip,
as per registry/antigravity-acp/agent.json at main · agentclientprotocol/registry · GitHub ,
on a Chromebook Plus w/ MediaTek Kompanio Ultra 910, running Debian 13 (Baguette),
fails as follows:

10312 third_party/tcmalloc/internal/system_allocator.h:620] MmapAligned() failed - unable to allocate with tag (hint=0x6e8fc0000000, size=1073741824, alignment=1073741824) - is something limiting address placement?
10312 third_party/tcmalloc/internal/system_allocator.h:627] Note: the allocation may have failed because TCMalloc assumes a 48-bit virtual address space size; you may need to rebuild TCMalloc with TCMALLOC_ADDRESS_BITS defined to your system's virtual address space size
10312 third_party/tcmalloc/arena.cc:115] CHECK in AllocSlow: FATAL ERROR: Out of memory trying to allocate internal tcmalloc data (bytes=131072, object-size=16384); is something preventing mmap from succeeding (sandbox, VSS limitations)?
Aborted

This failure is similar to that fixed earlier this summer for Antigravity CLI (cf. linux_arm64 binary fails on 39-bit ARM64 kernels due to TCMalloc 48-bit VA assumption · Issue #64 · google-antigravity/antigravity-cli · GitHub - linux_arm64 is default built with malloc)