Fix soundness hole in struct with expressions, e.g. S{x:foo, .. y} - #18672
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Fixes rust-lang#18567. Struct{x:foo, .. with_expr} did not walk with_expr, which allowed using moved variables in some cases. The CFG for structs also built up with with_expr happening before the fields, which is now reversed. (Fields are now before the with_expr in the CFG)
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Just to keep a record: @nikomatsakis commented on an earlier version asking about comments that I'd accidentally left above the walk_expr change. They were just there to record the problems I was seeing with the CFG fixed as well, and have now been changed. |
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r+ with clarification |
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…matsakis Fixes #18567. `Struct{x:foo, .. with_expr}` did not walk `with_expr`, which allowed using moved variables in some cases. The CFG for structs also built up with `with_expr` happening before the fields, which is now reversed. (Fields are now before the `with_expr` in the CFG)
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internal: Do not require a special env var to be set for the proc-macro-srv
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Fixes #18567.
Struct{x:foo, .. with_expr}did not walkwith_expr, which allowedusing moved variables in some cases. The CFG for structs also built up with
with_exprhappening before the fields, which is now reversed. (Fields are nowbefore the
with_exprin the CFG)