use Rust 1.91.1 instead of 1.88.0 for maturin 1.9.1 in 2025b toolchain

eb_hooks.py

@@ -151,7 +151,6 @@ def is_gcccore_1220_based(**kwargs):
     )
 
 
-
 def get_cuda_version(ec, check_deps=True, check_builddeps=True):
     """
     Returns the CUDA version that this EasyConfig (ec) uses as a (build)dependency.
@@ -632,6 +631,24 @@ def parse_hook_qt5_check_qtwebengine_disable(ec, eprefix):
         raise EasyBuildError("Qt5-specific hook triggered for non-Qt5 easyconfig?!")
 
 
+def parse_hook_maturin(ec, eprefix):
+    """
+    Replace build dependency on Rust 1.88.0 by 1.91.1,
+    as 1.88.0 causes segmentation faults on A64FX.
+    cfr. https://github.com/EESSI/software-layer/pull/1357
+    """
+    if ec.name == 'maturin':
+        if ec.version == '1.9.1':
+            orig_rust = ('Rust', '1.88.0')
+            new_rust = ('Rust', '1.91.1')
+            if orig_rust in ec['builddependencies']:
+                rust_index = ec['builddependencies'].index(orig_rust)
+                ec['builddependencies'][rust_index] = new_rust
+                print_msg(f"Replaced {orig_rust} build dependency by {new_rust} for {ec.name} {ec.version}")
+    else:
+        raise EasyBuildError("maturin-specific hook triggered for non-maturin easyconfig?!")
+
+
 def parse_hook_ucx_eprefix(ec, eprefix):
     """Make UCX aware of compatibility layer via additional configuration options."""
     if ec.name == 'UCX':
@@ -1818,6 +1835,7 @@ def post_easyblock_hook(self, *args, **kwargs):
     'fontconfig': parse_hook_fontconfig_add_fonts,
     'FreeImage': parse_hook_freeimage_aarch64,
     'grpcio': parse_hook_grpcio_zlib,
+    'maturin': parse_hook_maturin,
     'Mesa': parse_hook_mesa_use_llvm_minimal,
     'OpenBLAS': parse_hook_openblas_relax_lapack_tests_num_errors,
     'pybind11': parse_hook_pybind11_replace_catch2,