Fix handling of packages with bad markers for PyPiRepository

CHANGELOG.md

@@ -19,6 +19,7 @@
 ### Fixed
 
 - Fixed `show` command for VCS dependencies.
+- Fixed handling of releases with bad markers in PyPiRepository.
 
 
 ## [0.3.0] - 2018-03-05

poetry/repositories/pypi_repository.py

@@ -84,6 +84,13 @@ class PyPiRepository(Repository):
             release_info = self.get_release_info(name, version)
             package = Package(name, version, version)
             for req in release_info['requires_dist']:
+                try:
+                    req = InstallRequirement.from_line(req)
+                except Exception:
+                    # Probably an invalid marker
+                    # We strip the markers hoping for the best
+                    req = req.split(';')[0]
+
                     req = InstallRequirement.from_line(req)
 
                 name = req.name