The error is actually expected and uses the correct location.
gcc/testsuite/ChangeLog:
* rust/compile/raw-byte-string-loc.rs: Use dg-error instead of
dg-excess-error.
* rust/compile/raw-string-loc.rs: Likewise.
BREAK
// { dg-error "unrecognised token" "" { target *-*-* } .-1 }
-// { dg-excess-errors "error 'failed to parse item' does not have location" }
+// { dg-error "failed to parse item" "" { target *-*-* } .-2 }
BREAK
// { dg-error "unrecognised token" "" { target *-*-* } .-1 }
-// { dg-excess-errors "error 'failed to parse item' does not have location" }
+// { dg-error "failed to parse item" "" { target *-*-* } .-2 }