corrected typo

Author: harin-ramesh

src/asm.rs

@@ -18,7 +18,7 @@ use rustc_target::asm::*;
 use crate::builder::Builder;
 use crate::callee::get_fn;
 use crate::context::CodegenCx;
-use crate::errors::{NullBytesInAsm, UnwindingInlineAsm};
+use crate::errors::{NulBytesInAsm, UnwindingInlineAsm};
 use crate::type_of::LayoutGccExt;
 
 // Rust asm! and GCC Extended Asm semantics differ substantially.
@@ -926,11 +926,11 @@ impl<'gcc, 'tcx> AsmCodegenMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
         }
         // NOTE: seems like gcc will put the asm in the wrong section, so set it to .text manually.
         template_str.push_str("\n.popsection");
-        // NOTE: GCC's add_top_level_asm uses CString which cannot contain null bytes.
-        // Emit an error if there are any null bytes in the template string.
+        // NOTE: GCC's add_top_level_asm uses CString which cannot contain nul bytes.
+        // Emit an error if there are any nul bytes in the template string.
         if template_str.contains('\0') {
             let span = line_spans.first().copied().unwrap_or(DUMMY_SP);
-            self.tcx.dcx().emit_err(NullBytesInAsm { span });
+            self.tcx.dcx().emit_err(NulBytesInAsm { span });
             return;
         }
         self.context.add_top_level_asm(None, &template_str);

src/errors.rs

@@ -25,8 +25,8 @@ pub(crate) struct LtoBitcodeFromRlib {
 pub(crate) struct ExplicitTailCallsUnsupported;
 
 #[derive(Diagnostic)]
-#[diag("asm contains a NULL byte")]
-pub(crate) struct NullBytesInAsm {
+#[diag("asm contains a NUL byte")]
+pub(crate) struct NulBytesInAsm {
     #[primary_span]
     pub span: Span,
 }