Remove runtime changes

Author: chadrik

src/rez/solver.py

@@ -1086,9 +1086,6 @@ def reduce_by(self, package_request: Requirement) -> tuple[_PackageScope | None,
         if self.is_conflict or self.is_ephemeral:
             return (self, [])
 
-        assert self.variant_slice is not None, \
-            "variant_slice should always exist for non-conflicted non-ephemeral requests"
-
         # perform the reduction
         new_slice, reductions = self.variant_slice.reduce_by(package_request)
 
@@ -1974,12 +1971,12 @@ def __init__(self,
             self.optimised = optimised
 
         # these values are all set in _init()
-        self.phase_stack: list[_ResolvePhase]
-        self.failed_phase_list: list[_ResolvePhase]
-        self.depth_counts: dict
-        self.solve_begun: bool
-        self.solve_time: float
-        self.load_time: float
+        self.phase_stack: list[_ResolvePhase] = None
+        self.failed_phase_list: list[_ResolvePhase] = None
+        self.depth_counts: dict = None
+        self.solve_begun: bool = None
+        self.solve_time: float = None
+        self.load_time: float = None
 
         self.abort_reason: str | None = None
         self.callback_return: SolverCallbackReturn | None = None
@@ -2320,7 +2317,7 @@ def dump(self) -> None:
         for i, phase in enumerate(self.phase_stack):
             rows.append((self._depth_label(i), phase.status, str(phase)))
 
-        print("status: %s (%s)" % (self.status.name, self.status.value[0]))
+        print("status: %s (%s)" % (self.status.name, self.status.description))
         print("initial request: %s" % str(self.request_list))
         print()
         print("solve stack:")