[tor-bugs] #28260 [Applications/Tor Browser]: Tor nightly builds are broken on Linux with Rust enabled (since 10/31)

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#28260: Tor nightly builds are broken on Linux with Rust enabled (since 10/31)
-------------------------------------------+--------------------------
 Reporter:  gk                             |          Owner:  tbb-team
     Type:  defect                         |         Status:  new
 Priority:  High                           |      Milestone:
Component:  Applications/Tor Browser       |        Version:
 Severity:  Normal                         |     Resolution:
 Keywords:  tbb-rbm, TorBrowserTeam201810  |  Actual Points:
Parent ID:                                 |         Points:
 Reviewer:                                 |        Sponsor:
-------------------------------------------+--------------------------

Comment (by boklm):

 When trying to build rust 1.28.0, using rust 1.27.2, I'm getting the
 following error:
 {{{
    Compiling error-chain v0.11.0
    Compiling url v1.7.0
    Compiling semver v0.9.0
    Compiling toml v0.4.6
    Compiling cargo_metadata v0.5.4
    Compiling rustc_version v0.2.2
    Compiling clippy v0.0.202
 (file:///var/tmp/build/rustc-1.28.0-src/src/tools/clippy)
 error: failed to run custom build command for `clippy v0.0.202
 (file:///var/tmp/build/rustc-1.28.0-src/src/tools/clippy)`
 process didn't exit successfully:
 `/var/tmp/build/rustc-1.28.0-src/build/build/x86_64-unknown-linux-
 gnu/stage2-tools/release/build/clippy-24df587c23c51264/build-script-b
 uild` (exit code: 101)
 --- stderr
 thread 'main' panicked at 'current rustc version information does not
 contain a rustc commit date', libcore/option.rs:960:5
 note: Run with `RUST_BACKTRACE=1` for a backtrace.

 warning: build failed, waiting for other jobs to finish...
 error: failed to run custom build command for `clippy v0.0.202
 (file:///var/tmp/build/rustc-1.28.0-src/src/tools/clippy)`
 process didn't exit successfully:
 `/var/tmp/build/rustc-1.28.0-src/build/build/x86_64-unknown-linux-
 gnu/stage2-tools/release/build/clippy-24df587c23c51264/build-script-b
 uild` (exit code: 101)
 --- stderr
 thread 'main' panicked at 'current rustc version information does not
 contain a rustc commit date', libcore/option.rs:960:5
 note: Run with `RUST_BACKTRACE=1` for a backtrace.

 warning: build failed, waiting for other jobs to finish...
 error: build failed
 command did not execute successfully: "/var/tmp/dist/rust-rust-
 old/bin/cargo" "build" "--target" "x86_64-unknown-linux-gnu" "-j" "8" "--
 release" "--frozen" "--manifest-p
 ath" "/var/tmp/build/rustc-1.28.0-src/src/tools/clippy/Cargo.toml" "--
 features" "" "--message-format" "json"
 expected success, got: exit code: 101
 }}}

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/28260#comment:3>
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