[tor-bugs] #29244 [Core Tor/Tor]: Travis permissions error: failed to write Cargo.lock

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#29244: Travis permissions error: failed to write Cargo.lock
-------------------------------------------------+-------------------------
 Reporter:  teor                                 |          Owner:  (none)
     Type:  defect                               |         Status:  new
 Priority:  High                                 |      Milestone:  Tor:
                                                 |  0.4.1.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Major                                |     Resolution:
 Keywords:  041-proposed, tor-ci, regression,    |  Actual Points:
  040-backport 035-backport 034-backport         |
  033-backport?                                  |
Parent ID:                                       |         Points:  0.5
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------

Comment (by teor):

 Cargo recently started adding a comment to the start of the file:
 https://github.com/rust-
 lang/cargo/commit/3de188f1399da693c57054ed425bc0289752edd1

 But cargo checks for frozen before writing. We are getting the write
 failed error, not the frozen error.
 https://github.com/rust-
 lang/cargo/blob/3de188f1399da693c57054ed425bc0289752edd1/src/cargo/ops/lockfile.rs#L105

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/29244#comment:7>
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