Prevent infinite (exponential) recursion in only_used_in_recursion #8691
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This simplifies the visitor code a bit and prevents checking expressions multiple times. I still think this lint should be removed for now, because its code isn't really tested.
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r? @Manishearth (rust-highfive has picked a reviewer for you, use r? to override) |
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r? @llogiq |
flip1995
commented
Apr 12, 2022
| } | ||
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| fn visit_expr(&mut self, ex: &'tcx Expr<'tcx>) { | ||
| if !self.visited_exprs.insert(ex.hir_id) { | ||
| return; | ||
| } | ||
| match ex.kind { | ||
| ExprKind::Array(exprs) | ExprKind::Tup(exprs) => { |
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An example for missing tests: This whole arm could be removed completely and the tests keep passing, even though this changes the semantics of the lint.
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Thank you! That's what I would have done there, too. @bors r+ |
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📌 Commit 214fba7 has been approved by |
That still stands. But let's talk about this on Zulip |
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☀️ Test successful - checks-action_dev_test, checks-action_remark_test, checks-action_test |
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This simplifies the visitor code a bit and prevents checking expressions
multiple times. I still think this lint should be removed for now,
because its code isn't really tested.
Fixes #8689
NOTE: Before merging this, we should talk about removing and revisiting this lint. See my comment in #8689
changelog: prevent infinite recursion in [
only_used_in_recursion]