[core] Clear PATH cache on 'setglobal PATH'

Both SetNamedYsh and SetNamed need to have this hack - the former is
invoked in osh with 'setglobal PATH', the latter with 'PATH='

Signed-off-by: Andrii Sultanov <[email protected]>

Author: last-genius

core/state.py

@@ -1993,6 +1993,11 @@ def SetNamedYsh(self, lval, val, which_scopes, flags=0):
         assert flags & SetNameref == 0, flags
         assert flags & ClearNameref == 0, flags
 
+        # Hack: let SearchPath know it needs to reset the path
+        # cache before looking up a command
+        if lval.name == 'PATH':
+            self.clear_path_cache = True
+
         cell, var_frame = self._ResolveNameForYshMutation(
             lval.name, which_scopes, bool(flags & YshDecl))