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fix: remove no-op ORT_DISABLE_COREML env var (#397) (#653)

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ORT_DISABLE_COREML is not a recognized ONNX Runtime environment
variable. ONNX Runtime does not expose a global env var to disable
individual execution providers -- providers are selected per session
via the providers argument to InferenceSession. Setting it had zero
effect.

The mitigation was added in df33550 (v3.1.0) with the stated goal of
fixing the #74 ARM64 segfault. Two problems: the env var doesn't
work as described above, and #74 is a null-pointer crash in
chromadb_rust_bindings.abi3.so -- not an ONNX issue, so disabling
CoreML would not have fixed it anyway.

#521 has since traced the actual macOS arm64 crashes (both mine and
search) to the 0.x chromadb hnswlib binding. Filtering
CoreMLExecutionProvider at the ONNX layer leaves the hnswlib C++
crash intact, so the real fix is upgrading chromadb to 1.5.4+,
which #581 proposes. This PR only removes the misleading no-op and
leaves a NOTE pointing at #521 / #581.

Closes #397
This commit is contained in:
Mikhail Valentsev
2026-04-12 11:05:56 +05:00
committed by GitHub
parent 4621f85d7c
commit 5b67e0740e
1 changed files with 13 additions and 6 deletions
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mempalace/__init__.py
+13 -6
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@@ -1,8 +1,6 @@
"""MemPalace — Give your AI a memory. No API key required."""
import logging
import os
import platform
from .cli import main # noqa: E402
from .version import __version__ # noqa: E402
@@ -13,9 +11,18 @@ from .version import __version__ # noqa: E402
# 1 positional argument but 3 were given"). Silence just that logger.
logging.getLogger("chromadb.telemetry.product.posthog").setLevel(logging.CRITICAL)
# ONNX Runtime's CoreML provider segfaults during vector queries on Apple Silicon.
# Force CPU execution unless the user has explicitly set a preference.
if platform.machine() == "arm64" and platform.system() == "Darwin":
os.environ.setdefault("ORT_DISABLE_COREML", "1")
# NOTE: the previous block set ``ORT_DISABLE_COREML=1`` on macOS arm64 as a
# supposed workaround for the #74 ARM64 segfault. Two problems:
#
# 1. ONNX Runtime does not read that env var -- it has no global way to
# disable a single execution provider, so the setdefault was a no-op.
# 2. #74 is a null-pointer crash in ``chromadb_rust_bindings.abi3.so``, not
# an ONNX issue, so disabling CoreML would not have fixed it anyway.
#
# #521 has since traced the actual macOS arm64 crashes (both in mine and
# search paths) to the 0.x chromadb hnswlib binding. Filtering
# CoreMLExecutionProvider at the ONNX layer leaves the hnswlib C++ crash
# intact, so the real fix is upgrading chromadb to 1.5.4+, which #581
# proposes. See #397 for the history of this line.
__all__ = ["main", "__version__"]