******************************************************************************** conan install qt/5.15.2@ --build=qt --profile=C:\J\w\BuildSingleReference/20237/d7b2e573-ca0f-4b36-8973-8b7e712fe015/profile.txt ******************************************************************************** Configuration: [settings] arch=x86_64 arch_build=x86_64 build_type=Release compiler=Visual Studio compiler.runtime=MD compiler.version=14 os=Windows os_build=Windows [options] qt:shared=True [build_requires] [env] Traceback (most recent call last): File "c:\python36\lib\site-packages\conans\client\command.py", line 2164, in run method(args[0][1:]) File "c:\python36\lib\site-packages\conans\client\command.py", line 536, in install lockfile_node_id=args.lockfile_node_id) File "c:\python36\lib\site-packages\conans\client\conan_api.py", line 93, in wrapper return f(api, *args, **kwargs) File "c:\python36\lib\site-packages\conans\client\conan_api.py", line 560, in install_reference lockfile_node_id=lockfile_node_id) File "c:\python36\lib\site-packages\conans\client\manager.py", line 59, in deps_install lockfile_node_id=lockfile_node_id) File "c:\python36\lib\site-packages\conans\client\graph\graph_manager.py", line 120, in load_graph apply_build_requires=apply_build_requires) File "c:\python36\lib\site-packages\conans\client\graph\graph_manager.py", line 255, in _resolve_graph graph_lock=graph_lock) File "c:\python36\lib\site-packages\conans\client\graph\graph_manager.py", line 365, in _load_graph apply_build_requires=apply_build_requires) File "c:\python36\lib\site-packages\conans\client\graph\graph_manager.py", line 286, in _recurse_build_requires self._binary_analyzer.evaluate_graph(graph, build_mode, update, remotes, nodes_subset, root) File "c:\python36\lib\site-packages\conans\client\graph\graph_binaries.py", line 389, in evaluate_graph self._evaluate_node(node, build_mode, update, remotes) File "c:\python36\lib\site-packages\conans\client\graph\graph_binaries.py", line 176, in _evaluate_node self._process_node(node, pref, build_mode, update, remotes) File "c:\python36\lib\site-packages\conans\client\graph\graph_binaries.py", line 242, in _process_node self._evaluate_cache_pkg(node, package_layout, pref, metadata, remote, remotes, update) File "c:\python36\lib\site-packages\conans\client\graph\graph_binaries.py", line 95, in _evaluate_cache_pkg assert node.prev, "PREV for %s is None: %s" % (str(pref), metadata.dumps()) AssertionError: PREV for opengl/system:5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9 is None: {"recipe": {"revision": "15c5ec306b8c76037866518ef8d87ec9", "remote": "conan-center", "properties": {}, "checksums": {"conanmanifest.txt": {"md5": "f781eb2d5cedb210bda4239e2c0c30dd", "sha1": "a4f568c195b57c096eae6e31c4982e0f0689e81a"}, "conanfile.py": {"md5": "ecced3f74ea910384e1b7621b1ae2249", "sha1": "7bad86e49ca92a2a4bd162dd61292e28109496c6"}}}, "packages": {"5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9": {"revision": null, "recipe_revision": null, "remote": null, "properties": {}, "checksums": {}}}} ERROR: PREV for opengl/system:5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9 is None: {"recipe": {"revision": "15c5ec306b8c76037866518ef8d87ec9", "remote": "conan-center", "properties": {}, "checksums": {"conanmanifest.txt": {"md5": "f781eb2d5cedb210bda4239e2c0c30dd", "sha1": "a4f568c195b57c096eae6e31c4982e0f0689e81a"}, "conanfile.py": {"md5": "ecced3f74ea910384e1b7621b1ae2249", "sha1": "7bad86e49ca92a2a4bd162dd61292e28109496c6"}}}, "packages": {"5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9": {"revision": null, "recipe_revision": null, "remote": null, "properties": {}, "checksums": {}}}}