356d1f64bf
This PR fixes an issue reported [on Zulip](https://leanprover.zulipchat.com/#narrow/channel/239415-metaprogramming-.2F-tactics/topic/.60abstractMVars.60.20not.20instantiating.20level.20mvars/near/541918246) where `abstractMVars` (which is used in typeclass inference and `simp` argument elaboration) was not instantiating metavariables in the types of metavariables, causing it to abstract already-assigned metavariables. This also eliminates an unnecessary `instantiateMVars` and documents the invariant that the argument to `abstractExprMVars` must have its metavariables already instantiated. |
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| simpperf | ||
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| common.sh | ||
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| lean-toolchain | ||