[Bug 1335638] [NEW] git fetch fails silently if remote repo is not checked out on any branch

[Andrey Gelman]

Public bug reported:

Reproduction steps:
1) Create a git repository that has no branches at all (detached HEAD and no branches).
2) Let this repository serve as a remote to another repository.
   Now, 'git fetch <name>' fails silently.

Notes:
1) If it cannot succeed, let it fail loudly at least, if possible providing a useful hint.
2) A repository with no branches at all is not that rare thing as one might think - e.g. clone AOSP (Android Open Source Project) - every one of its git repos is checked out at some point with no branches at all.
3) I have built git version 2 - the bug is still there.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: git 1:1.9.1-1
ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2
Uname: Linux 3.13.0-29-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Jun 29 18:25:16 2014
InstallationDate: Installed on 2011-10-23 (980 days ago)
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111011)
SourcePackage: git
UpgradeStatus: Upgraded to trusty on 2014-05-25 (35 days ago)

** Affects: git (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug trusty

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https://bugs.launchpad.net/bugs/1335638

Title:
  git fetch fails silently if remote repo is not checked out on any
  branch

Status in “git” package in Ubuntu:
  New

Bug description:
  Reproduction steps:
  1) Create a git repository that has no branches at all (detached HEAD and no branches).
  2) Let this repository serve as a remote to another repository.
     Now, 'git fetch <name>' fails silently.

  Notes:
  1) If it cannot succeed, let it fail loudly at least, if possible providing a useful hint.
  2) A repository with no branches at all is not that rare thing as one might think - e.g. clone AOSP (Android Open Source Project) - every one of its git repos is checked out at some point with no branches at all.
  3) I have built git version 2 - the bug is still there.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: git 1:1.9.1-1
  ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2
  Uname: Linux 3.13.0-29-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sun Jun 29 18:25:16 2014
  InstallationDate: Installed on 2011-10-23 (980 days ago)
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111011)
  SourcePackage: git
  UpgradeStatus: Upgraded to trusty on 2014-05-25 (35 days ago)

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