[bug] 'assert node.pref.timestamp is not None' w/ test_requires in Conan v2 beta

Environment Details (include every applicable attribute)

• Operating System+version: macOS 12.3 (Monterey)
• Compiler+version: AppleClang 13.1.6.13160021
• Conan version: 2.0.0-beta1
• Python version: Python 3.10.5

Steps to reproduce (Include if Applicable)

1. git clone https://github.com/ssrobins/stackblox.git
2. cd stackblox
3. git checkout conan_v2_crash_gtest
4. Delete ~/.conan2
5. cmake --preset macos

Logs (Executed commands with output) (Include/Attach if Applicable)

The conan install command embedded in CMake fails with this error:

bzip2/1.0.8@ssrobins: Retrieving package 24df4bc901e0688f1084351da5b2fa6f658304da from remote 'artifactory-ssrobins' 
Downloading conanmanifest.txt
Downloading conaninfo.txt
Downloading conan_package.tgz
Decompressing conan_package.tgz
bzip2/1.0.8@ssrobins: Package installed 24df4bc901e0688f1084351da5b2fa6f658304da
bzip2/1.0.8@ssrobins: Downloaded package revision 14f612c81887fa9f529df75848f822cf
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/conans/cli/cli.py", line 163, in run
    command.run(self._conan_api, self._commands[command_argument].parser, args[0][1:])
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/conans/cli/command.py", line 157, in run
    info = self._method(conan_api, parser, *args)
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/conans/cli/commands/install.py", line 170, in install
    conan_api.install.install_binaries(deps_graph=deps_graph, remotes=remote, update=args.update)
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/conan/api/subapi/__init__.py", line 21, in wrapper
    return f(subapi, *args, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/conan/api/subapi/install.py", line 29, in install_binaries
    installer.install(deps_graph)
ERROR: 
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/conans/client/installer.py", line 221, in install
    self._download_bulk(install_order)
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/conans/client/installer.py", line 249, in _download_bulk
    self._download_pkg(node)
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/conans/client/installer.py", line 254, in _download_pkg
    assert node.pref.timestamp is not None
AssertionError

The key to the crash is switching the gtest package from requires to test_requires: https://github.com/ssrobins/conan-recipes/commit/c2bf54494ddbc618032ced9ad5615fcf703c996e …which I obviously want so my app doesn’t get built with gtest.

I wasn’t seeing this in local builds, but it was happening in GitHub Actions CI. Deleting ~/.conan2 let me reproduce it locally. Happens in Windows, but not Linux CI environments.

Reverting this commit and repeating the steps above prevents the error: https://github.com/ssrobins/stackblox/commit/bf26cd602a5815bfb67e5c5e4be8d4b7f695ee36

[ssrobins]

Confirmed that the bug is still fixed in 2.0.0-beta2. Deleted my conan_v2_crash_gtest since this is fixed and the work has been merged to main.

[memsharded]

Closed by https://github.com/conan-io/conan/pull/11619, to be released in beta.2