mdist: don't mutate meson_command, which is supposed to be immutable

mesonbuild/mdist.py

@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: Apache-2.0
 # Copyright 2017 The Meson development team
-# Copyright © 2023 Intel Corporation
+# Copyright © 2023-2024 Intel Corporation
 
 from __future__ import annotations
 
@@ -289,7 +289,7 @@ def run_dist_steps(meson_command: T.List[str], unpacked_src_dir: str, builddir:
         return 1
     return 0
 
-def check_dist(packagename: str, meson_command: ImmutableListProtocol[str], extra_meson_args: T.List[str], bld_root: str, privdir: str) -> int:
+def check_dist(packagename: str, _meson_command: ImmutableListProtocol[str], extra_meson_args: T.List[str], bld_root: str, privdir: str) -> int:
     print(f'Testing distribution package {packagename}')
     unpackdir = os.path.join(privdir, 'dist-unpack')
     builddir = os.path.join(privdir, 'dist-build')
@@ -303,6 +303,7 @@ def check_dist(packagename: str, meson_command: ImmutableListProtocol[str], extr
     unpacked_files = glob(os.path.join(unpackdir, '*'))
     assert len(unpacked_files) == 1
     unpacked_src_dir = unpacked_files[0]
+    meson_command = _meson_command.copy()
     meson_command += ['setup']
     meson_command += create_cmdline_args(bld_root)
     meson_command += extra_meson_args