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conan install libtool/2.4.6@ --profile=C:\J\w\BuildSingleReference/10650/84c24a58-a784-43d7-bd39-bac07b2ea14b/profile.txt --build=libtool
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Configuration:
[settings]
arch=x86_64
arch_build=x86_64
build_type=Release
compiler=Visual Studio
compiler.runtime=MT
compiler.version=15
os=Windows
os_build=Windows
[options]
libtool:shared=False
[build_requires]
[env]

Traceback (most recent call last):
  File "c:\python36\lib\site-packages\conans\client\command.py", line 2115, in run
    method(args[0][1:])
  File "c:\python36\lib\site-packages\conans\client\command.py", line 531, in install
    lockfile_node_id=args.lockfile_node_id)
  File "c:\python36\lib\site-packages\conans\client\conan_api.py", line 94, 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 57, in deps_install
    lockfile_node_id=lockfile_node_id)
  File "c:\python36\lib\site-packages\conans\client\graph\graph_manager.py", line 116, in load_graph
    apply_build_requires=apply_build_requires)
  File "c:\python36\lib\site-packages\conans\client\graph\graph_manager.py", line 246, 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 m4/1.4.18:0a420ff5c47119e668867cdb51baff0eca1fdb68 is None: {"recipe": {"revision": "92b62c5200e59ddc217d9c8aa9f4166c", "remote": "conan-center", "properties": {}, "checksums": {"conan_export.tgz": {"md5": "3967439428fd01493b6d2c9693fb8b48", "sha1": "54af6efe3a323f50efa03417760bd3ab340b3a6d"}, "conanmanifest.txt": {"md5": "4285d0025518ec535b2bacc10869b6b5", "sha1": "75082d8950f73d970abf7b3cbc0044ea5c7f6e0b"}, "conanfile.py": {"md5": "e62bba14648ead085f3c84385aa0abef", "sha1": "863f9f2da65a2547c34990d22865dc606187befb"}}}, "packages": {"0a420ff5c47119e668867cdb51baff0eca1fdb68": {"revision": null, "recipe_revision": null, "remote": null, "properties": {}, "checksums": {}}}}

ERROR: PREV for m4/1.4.18:0a420ff5c47119e668867cdb51baff0eca1fdb68 is None: {"recipe": {"revision": "92b62c5200e59ddc217d9c8aa9f4166c", "remote": "conan-center", "properties": {}, "checksums": {"conan_export.tgz": {"md5": "3967439428fd01493b6d2c9693fb8b48", "sha1": "54af6efe3a323f50efa03417760bd3ab340b3a6d"}, "conanmanifest.txt": {"md5": "4285d0025518ec535b2bacc10869b6b5", "sha1": "75082d8950f73d970abf7b3cbc0044ea5c7f6e0b"}, "conanfile.py": {"md5": "e62bba14648ead085f3c84385aa0abef", "sha1": "863f9f2da65a2547c34990d22865dc606187befb"}}}, "packages": {"0a420ff5c47119e668867cdb51baff0eca1fdb68": {"revision": null, "recipe_revision": null, "remote": null, "properties": {}, "checksums": {}}}}