compiler error on lacking inline asm

src/lib_klee_replay.rs

@@ -4,6 +4,9 @@ use cstr_core::c_char;
 #[doc(hidden)]
 pub use cstr_core::CStr;
 
+#[cfg(not(feature = "inline-asm"))]
+compile_error!("klee-replay requires feature `inline-asm`");
+
 #[inline(always)]
 fn klee_abort() -> ! {
     panic!();