fix(ext/ffi): disallow empty ffi structs (#17487)

This patch makes `NativeType` to `libffi::middle::Type` conversion
failliable and w.t disallows struct with empty fields. libffi does not
handle "empty" struct because they don't exist in C (or Rust).

Fixes #17481

1 files changed, 2 insertions, 2 deletions

diff --git a/ext/ffi/call.rs b/ext/ffi/call.rs
index 2cfd5cef0..731460af9 100644
--- a/ext/ffi/call.rs
+++ b/ext/ffi/call.rs
@@ -278,7 +278,7 @@ where
     permissions.check(None)?;
   };
 
-  let symbol = PtrSymbol::new(pointer, &def);
+  let symbol = PtrSymbol::new(pointer, &def)?;
   let call_args = ffi_parse_args(scope, parameters, &def.parameters)?;
   let def_result = def.result.clone();
 
@@ -379,7 +379,7 @@ where
     permissions.check(None)?;
   };
 
-  let symbol = PtrSymbol::new(pointer, &def);
+  let symbol = PtrSymbol::new(pointer, &def)?;
   let call_args = ffi_parse_args(scope, parameters, &def.parameters)?;
 
   let out_buffer = out_buffer