fixes

examples/issue-0009.sx

@@ -0,0 +1,23 @@
+// issue-0009: `push` with Context containing inline protocol triggers LLVM verification error
+//
+// LLVM verification failed: Invalid InsertValueInst operands!
+//   %si24 = insertvalue { ptr, ptr, ptr } undef, { ptr, ptr, ptr } %si21, 0
+//
+// Context contains `allocator: Allocator` where `Allocator :: protocol #inline`.
+// push saves/restores context as a value, but LLVM lowering mishandles the struct
+// when the first field is an inline protocol cast from a different impl (Arena).
+
+#import "modules/std.sx";
+#import "modules/allocators.sx";
+
+main :: () -> void {
+    arena : Arena = ---;
+    arena.create(context.allocator, 4096);
+
+    new_ctx := Context.{ allocator = xx @arena, data = context.data };
+    push new_ctx {
+        ptr := context.allocator.alloc(128);
+        out("inside push\n");
+    }
+    out("after push\n");
+}