bash: use libc malloc on musl instead of internal malloc (#46370)

var/spack/repos/builtin/packages/bash/package.py

@@ -203,6 +203,9 @@ def configure_args(self):
             args.append(f"--with-libiconv-prefix={spec['iconv'].prefix}")
         else:
             args.append("--without-libiconv-prefix")
+        # bash malloc relies on sbrk which fails intentionally in musl
+        if spec.satisfies("^[virtuals=libc] musl"):
+            options.append("--without-bash-malloc")
         return args
 
     def check(self):