[4.2.x] Fixed #34267 -- Fixed sliced QuerySet.union() crash.

Regression in 3d734c09ff0138441dfe0a59010435871d17950f.

Thanks Raphaël Stefanini for the report.

Backport of cc8aa6bf9c127a493e6dd005012b9e6397b3f319 from main

1 files changed, 0 insertions, 3 deletions

diff --git a/django/db/models/sql/compiler.py b/django/db/models/sql/compiler.py
index 97ecd58bdd..7c433b3f06 100644
--- a/django/db/models/sql/compiler.py
+++ b/django/db/models/sql/compiler.py
@@ -532,15 +532,12 @@ class SQLCompiler:
                         "ORDER BY not allowed in subqueries of compound statements."
                     )
         elif self.query.is_sliced and combinator == "union":
-            limit = (self.query.low_mark, self.query.high_mark)
             for compiler in compilers:
                 # A sliced union cannot have its parts elided as some of them
                 # might be sliced as well and in the event where only a single
                 # part produces a non-empty resultset it might be impossible to
                 # generate valid SQL.
                 compiler.elide_empty = False
-                if not compiler.query.is_sliced:
-                    compiler.query.set_limits(*limit)
         parts = ()
         for compiler in compilers:
             try: