[Bug 2000274] Re: rust-all uses missing dependency llvm-14, cannot be installed.

[ChengEn, Du]

[Bionic]
root at bionic:~# lsb_release -rc
Release:	18.04
Codename:	bionic
root at bionic:~# apt-cache policy rust-all
rust-all:
  Installed: 1.65.0+dfsg0ubuntu1~llvm2-0ubuntu0.18.04
  Candidate: 1.65.0+dfsg0ubuntu1~llvm2-0ubuntu0.18.04
  Version table:
 *** 1.65.0+dfsg0ubuntu1~llvm2-0ubuntu0.18.04 500
        500 http://tw.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 Packages
        500 http://tw.archive.ubuntu.com/ubuntu bionic-security/universe amd64 Packages
        100 /var/lib/dpkg/status
     1.61.0+dfsg1~llvm-1~exp1ubuntu0.18.04.1 500
        500 http://tw.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 Packages
        500 http://tw.archive.ubuntu.com/ubuntu bionic-security/universe amd64 Packages
     1.59.0+dfsg1~ubuntu1~llvm-1~ubuntu1~18.04.2 500
        500 http://tw.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 Packages
        500 http://tw.archive.ubuntu.com/ubuntu bionic-security/universe amd64 Packages
     1.57.0+dfsg1+llvm-0ubuntu1~18.04.1 500
        500 http://tw.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 Packages
        500 http://tw.archive.ubuntu.com/ubuntu bionic-security/universe amd64 Packages
     1.53.0+dfsg1+llvm-4ubuntu1~18.04.1 500
        500 http://tw.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 Packages
        500 http://tw.archive.ubuntu.com/ubuntu bionic-security/universe amd64 Packages

[Focal]
root at focal:/etc/apt# lsb_release -rc
Release:	20.04
Codename:	focal
root at focal:/etc/apt# apt-cache policy rust-all
rust-all:
  Installed: 1.65.0+dfsg0ubuntu1~llvm2-0ubuntu0.20.04
  Candidate: 1.65.0+dfsg0ubuntu1~llvm2-0ubuntu0.20.04
  Version table:
 *** 1.65.0+dfsg0ubuntu1~llvm2-0ubuntu0.20.04 500
        500 http://tw.archive.ubuntu.com/ubuntu focal-updates/universe amd64 Packages
        500 http://tw.archive.ubuntu.com/ubuntu focal-security/universe amd64 Packages
        100 /var/lib/dpkg/status
     1.61.0+dfsg1~llvm-1~exp1ubuntu0.20.04.1 500
        500 http://tw.archive.ubuntu.com/ubuntu focal-updates/universe amd64 Packages
        500 http://tw.archive.ubuntu.com/ubuntu focal-security/universe amd64 Packages
     1.59.0+dfsg1~ubuntu1~llvm-1~ubuntu1~20.04.2 500
        500 http://tw.archive.ubuntu.com/ubuntu focal-updates/universe amd64 Packages
        500 http://tw.archive.ubuntu.com/ubuntu focal-security/universe amd64 Packages
     1.57.0+dfsg1+llvm-0ubuntu1~20.04.1 500
        500 http://tw.archive.ubuntu.com/ubuntu focal-updates/universe amd64 Packages
        500 http://tw.archive.ubuntu.com/ubuntu focal-security/universe amd64 Packages
     1.53.0+dfsg1+llvm-4ubuntu1~20.04.1 500
        500 http://tw.archive.ubuntu.com/ubuntu focal-updates/universe amd64 Packages
        500 http://tw.archive.ubuntu.com/ubuntu focal-security/universe amd64 Packages

** Changed in: rustc (Ubuntu Bionic)
       Status: Triaged => Fix Released

** Changed in: rustc (Ubuntu Focal)
       Status: Triaged => Fix Released

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https://bugs.launchpad.net/bugs/2000274

Title:
  rust-all uses missing dependency llvm-14, cannot be installed.

Status in rustc package in Ubuntu:
  Fix Released
Status in rustc source package in Bionic:
  Fix Released
Status in rustc source package in Focal:
  Fix Released

Bug description:
  [Impact]
  rust-all cannot install because llvm-14 is unavailable on focal, which is one of its dependencies.

  [Test Plan]
  root at focal:~# lsb_release -rc
  Release:	20.04
  Codename:	focal
  root at focal:~# apt install rust-all
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  Some packages could not be installed. This may mean that you have
  requested an impossible situation or if you are using the unstable
  distribution that some required packages have not yet been created
  or been moved out of Incoming.
  The following information may help to resolve the situation:

  The following packages have unmet dependencies:
   rust-all : Depends: llvm-14 but it is not installable
  E: Unable to correct problems, you have held broken packages.

  [Where problems could occur]
  We need to modify the dependencies to solve this issue.
  The regression can be considered as low.

  [Other Info]

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