Apparently the target_arch is "x86", not "i686"

Author: asomers

test/test_ptymaster_drop.rs

@@ -13,7 +13,7 @@ use std::os::unix::io::AsRawFd;
 #[should_panic(expected = "Closing an invalid file descriptor!")]
 // In Travis on i686-unknown-linux-musl, this test gets SIGABRT.  I don't know
 // why.  It doesn't happen on any other target, and it doesn't happen on my PC.
-#[cfg_attr(all(target_env = "musl", target_arch = "i686"), ignore)]
+#[cfg_attr(all(target_env = "musl", target_arch = "x86"), ignore)]
 fn test_double_close() {
     let m = posix_openpt(O_RDWR).unwrap();
     close(m.as_raw_fd()).unwrap();