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

easystacks/software.eessi.io/2025.06/eessi-2025.06-eb-5.2.0-2025b.yml

@@ -0,0 +1,2 @@
+easyconfigs:
+  - Python-bundle-PyPI-2025.07-GCCcore-14.3.0.eb

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.
@@ -255,6 +254,10 @@ def parse_hook(ec, *args, **kwargs):
     # inject the GPU property (if required)
     ec = inject_gpu_property(ec)
 
+    # run parse_hook_rust_2025b for any 2025b easyconfig
+    if ec['toolchain']['version'] in ['14.3.0', '2025b']:
+        parse_hook_rust_2025b(ec, eprefix)
+
 
 def parse_list_of_dicts_env(var_name):
     """Parse a list of dicts that are stored in an environment variable string"""
@@ -632,6 +635,20 @@ def parse_hook_qt5_check_qtwebengine_disable(ec, eprefix):
         raise EasyBuildError("Qt5-specific hook triggered for non-Qt5 easyconfig?!")
 
 
+def parse_hook_rust_2025b(ec, eprefix):
+    """
+    Replace build dependency on Rust 1.88.0 (used by the 2025b toolchain) by 1.91.1,
+    as 1.88.0 causes segmentation faults on A64FX.
+    cfr. https://github.com/EESSI/software-layer/pull/1357
+    """
+    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}.")
+
+
 def parse_hook_ucx_eprefix(ec, eprefix):
     """Make UCX aware of compatibility layer via additional configuration options."""
     if ec.name == 'UCX':