Don't leak a TokenStream in Ctxt::emit_errors. #2
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tesaguri
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Sep 20, 2019
* patch-1: Don't leak a TokenStream in Ctxt::emit_errors.
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This was found by crater on rust-lang/rust#63809 (results at rust-lang/rust#64398 (comment)).
While there is no resource leak being caused (as
proc_macro"objects" get cleaned up anyway), we might wantrustcto warn/error in such cases because they can also be caused by keeping aproc_macro"object" (such as aTokenStream) for longer than the scope of the proc macro invocation.