fix ICE on specific malformed asm clobber_abi

Author: asquared31415

compiler/rustc_builtin_macros/src/asm.rs

@@ -379,16 +379,12 @@ fn parse_clobber_abi<'a>(p: &mut Parser<'a>, args: &mut AsmArgs) -> PResult<'a,
     }
 
     let mut new_abis = Vec::new();
-    loop {
+    while !p.eat(&token::CloseDelim(Delimiter::Parenthesis)) {
         match p.parse_str_lit() {
             Ok(str_lit) => {
                 new_abis.push((str_lit.symbol_unescaped, str_lit.span));
             }
             Err(opt_lit) => {
-                // If the non-string literal is a closing paren then it's the end of the list and is fine
-                if p.eat(&token::CloseDelim(Delimiter::Parenthesis)) {
-                    break;
-                }
                 let span = opt_lit.map_or(p.token.span, |lit| lit.span);
                 let mut err =
                     p.sess.span_diagnostic.struct_span_err(span, "expected string literal");

tests/ui/asm/x86_64/parse-error.rs renamed to tests/ui/asm/parse-error.rs

@@ -1,4 +1,4 @@
-// only-x86_64
+// needs-asm-support
 
 #![feature(asm_const)]
 
@@ -38,6 +38,9 @@ fn main() {
         //~^ ERROR expected one of
         asm!("{}", options(), const foo);
         //~^ ERROR attempt to use a non-constant value in a constant
+
+        // test that asm!'s clobber_abi doesn't accept non-string literals
+        // see also https://github.com/rust-lang/rust/issues/112635
         asm!("", clobber_abi());
         //~^ ERROR at least one abi must be provided
         asm!("", clobber_abi(foo));
@@ -46,6 +49,25 @@ fn main() {
         //~^ ERROR expected one of `)` or `,`, found `foo`
         asm!("", clobber_abi("C", foo));
         //~^ ERROR expected string literal
+        asm!("", clobber_abi(1));
+        //~^ ERROR expected string literal
+        asm!("", clobber_abi(()));
+        //~^ ERROR expected string literal
+        asm!("", clobber_abi(uwu));
+        //~^ ERROR expected string literal
+        asm!("", clobber_abi({}));
+        //~^ ERROR expected string literal
+        asm!("", clobber_abi(loop {}));
+        //~^ ERROR expected string literal
+        asm!("", clobber_abi(if));
+        //~^ ERROR expected string literal
+        asm!("", clobber_abi(do));
+        //~^ ERROR expected string literal
+        asm!("", clobber_abi(<));
+        //~^ ERROR expected string literal
+        asm!("", clobber_abi(.));
+        //~^ ERROR expected string literal
+
         asm!("{}", clobber_abi("C"), const foo);
         //~^ ERROR attempt to use a non-constant value in a constant
         asm!("", options(), clobber_abi("C"));