[tor-bugs] #24761 [Core Tor/Tor]: rust: protover.rs needs retain_hash_collection to build with older rustc versions

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#24761: rust: protover.rs needs retain_hash_collection to build with older rustc
versions
--------------------------------+------------------------------------
 Reporter:  teor                |          Owner:  teor
     Type:  defect              |         Status:  needs_review
 Priority:  Medium              |      Milestone:  Tor: 0.3.2.x-final
Component:  Core Tor/Tor        |        Version:  Tor: 0.3.2.1-alpha
 Severity:  Normal              |     Resolution:
 Keywords:  rust, 032-backport  |  Actual Points:  0.1
Parent ID:                      |         Points:  0.1
 Reviewer:                      |        Sponsor:
--------------------------------+------------------------------------
Changes (by teor):

 * status:  assigned => needs_review
 * actualpoints:   => 0.1


Comment:

 Please see my branch bug24761 on https://github.com/teor2345/tor.git

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/24761#comment:1>
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