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fix(oss-build): allow nightly features on stable via RUSTC_BOOTSTRAP #1365

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fix(oss-build): allow nightly features on stable via RUSTC_BOOTSTRAP #1365

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3 changes: 3 additions & 0 deletions eden/scm/build.py
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Expand Up @@ -430,6 +430,9 @@ def cargo_env(args):
env["OPENSSL_DIR"] = str(openssl)
env.pop("OPENSSL_STATIC", None)
env["RUSTFLAGS"] = (env.get("RUSTFLAGS", "") + " -Anon_local_definitions").strip()
# Allow nightly features (smallvec specialization, once_cell_try) on stable Rust.
# Required for `make oss` / cargo oss builds. Buck builds use nightly toolchain internally.
env.setdefault("RUSTC_BOOTSTRAP", "1")
set_windows_python_path(env, args.python)
return env

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