fixes

examples/issue-0010.sx

@@ -0,0 +1,34 @@
+// issue-0010: Closure returning a protocol value generates invalid LLVM IR
+//
+// LLVM verification failed: Called function must be a pointer!
+//   %icall = call addrspace(64) i64 %load56()
+//
+// A Closure() -> MyProtocol where MyProtocol is a protocol (not #inline)
+// fails at codegen. Calling the function directly works fine; only the
+// closure dispatch path is broken.
+
+#import "modules/std.sx";
+
+MyProtocol :: protocol {
+    get_value :: () -> s64;
+}
+
+MyImpl :: struct { value: s64; }
+impl MyProtocol for MyImpl {
+    get_value :: (self: *MyImpl) -> s64 { self.value; }
+}
+
+make_thing :: () -> MyProtocol {
+    MyImpl.{ value = 42 };
+}
+
+main :: () -> void {
+    // Direct call works:
+    v := make_thing();
+    out("direct call works\n");
+
+    // Closure call crashes:
+    c := closure(make_thing);
+    result := c();
+    out("closure call works\n");
+}