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Shin (Former Aleph) 501d54edec ci(release): pin i686-pc-windows-msvc to Rust 1.77.2 for Win7 compat (#323)
* ci(release): pin i686-pc-windows-msvc to Rust 1.77.2 for Win7 compat

Fixes #318. Rust 1.78 (May 2024) raised the std MSRV for Windows from
Win7 to Win10 by switching std::time to GetSystemTimePreciseAsFileTime,
a kernel32 export that doesn't exist on Win7 SP1. Building the i686
binary with stable Rust (currently 1.86+) produces an exe that fails
to load on Win7 with "the procedure entry point
GetSystemTimePreciseAsFile could not be located in the dynamic link
library kernel32.dll" — making the whole reason we ship i686 (legacy
Win7 32-bit boxes per #272) moot.

Add a per-matrix `rust_toolchain` knob; only i686-pc-windows-msvc uses
it, pinning to 1.77.2 (last stable that supports Win7). Other targets
remain on @stable and pick up regular Rust updates.

dtolnay/rust-toolchain switches from `@stable` to `@master` because
the per-tag aliases (`@stable`, `@1.77.2`) can't be selected via a
matrix variable — `@master` accepts the toolchain string as input.

Cache key gains a toolchain suffix so the 1.77.2 cache doesn't collide
with the stable cache for the same target, and a future toolchain bump
invalidates only the affected slot.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* ci(release): make i686-pc-windows-msvc continue-on-error

Companion to the Rust 1.77.2 pin: if the deps' MSRV ever moves above
1.77, the i686 target will fail to build, but we don't want it to
block the rest of the release. Mirror the mipsel-softfloat approach.
If/when this triggers, options are dropping i686 entirely or moving
to the tier-3 i686-win7-windows-msvc target.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

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Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-04-27 15:51:13 +03:00
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