Fix parsing of platform_release markers

poetry/version/markers.py

@@ -230,6 +230,7 @@ class EmptyMarker(BaseMarker):
 class SingleMarker(BaseMarker):
 
     _CONSTRAINT_RE = re.compile(r"(?i)^(~=|!=|>=?|<=?|==?|in|not in)?\s*(.+)$")
+    _VERSION_LIKE_MARKER_NAME = {"python_version", "platform_release"}
 
     def __init__(self, name, constraint):
         from poetry.packages.constraints import (
@@ -248,10 +249,10 @@ class SingleMarker(BaseMarker):
 
         self._value = m.group(2)
         self._parser = parse_generic_constraint
-        if self._name == "python_version":
+
+        if name in self._VERSION_LIKE_MARKER_NAME:
             self._parser = parse_constraint
 
-        if name == "python_version":
             if self._operator in {"in", "not in"}:
                 versions = []
                 for v in re.split("[ ,]+", self._value):

poetry/version/requirements.py

@@ -174,8 +174,8 @@ MARKER_EXPR = originalTextFor(MARKER_EXPR())("marker")
 MARKER_EXPR.setParseAction(
     lambda s, l, t: parse_marker(s[t._original_start : t._original_end])
 )
-MARKER_SEPERATOR = SEMICOLON
-MARKER = MARKER_SEPERATOR + MARKER_EXPR
+MARKER_SEPARATOR = SEMICOLON
+MARKER = MARKER_SEPARATOR + MARKER_EXPR
 
 VERSION_AND_MARKER = VERSION_SPEC + Optional(MARKER)
 URL_AND_MARKER = URL + Optional(MARKER)

tests/version/test_markers.py

@@ -423,3 +423,18 @@ def test_validate(marker_string, environment, expected):
     m = parse_marker(marker_string)
 
     assert m.validate(environment) is expected
+
+
+@pytest.mark.parametrize(
+    "marker, env",
+    [
+        (
+            'platform_release >= "9.0" and platform_release < "11.0"',
+            {"platform_release": "10.0"},
+        )
+    ],
+)
+def test_parse_version_like_markers(marker, env):
+    m = parse_marker(marker)
+
+    assert m.validate(env)