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DRAFT: Enable different rust versions for host and guest - #388

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simongdavies wants to merge 1 commit into
hyperlight-dev:mainfrom
simongdavies:split-toolchains
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simongdavies wants to merge 1 commit into
hyperlight-dev:mainfrom
simongdavies:split-toolchains

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Changes to allow the hyperlight host and guest runtimes to be built with/require different versions of Rust tools compiler following a similar change in hyperlight.

DRAFT/DO NOT MERGE until this change to cargo hyperlight is merged

Moves host to rust 1.99, no changes to msrv.

…e independently

Signed-off-by: Simon Davies <simongdavies@users.noreply.github.com>
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Superseded by #389, which preserves the exact same commit on an upstream branch so GitHub native stacked PRs can be used. The fork branch is retained.

simongdavies added a commit that referenced this pull request Nov 12, 2026
Supersedes #388 with the same compiler-split commit
(5a11a82), now on an upstream branch so
dependent changes can use GitHub native stacked PRs.

Allows the host and guest runtime to use separate Rust toolchains,
following hyperlight-dev/hyperlight#1962. The host uses Rust 1.99.1; the
guest remains on Rust 1.90. No MSRV change.

A separate stacked PR will apply the dependency update from #300 to test
it with the newer host compiler. No workflow branch filters are changed.

---------

Signed-off-by: Simon Davies <simongdavies@users.noreply.github.com>
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