Fishy --dep fix, things were fishy before, too

miri-script/src/commands.rs

@@ -499,9 +499,12 @@ impl Command {
         let mut early_flags = Vec::<OsString>::new();
 
         // Add target, edition to flags.
-        if let Some(target) = &target {
-            early_flags.push("--target".into());
-            early_flags.push(target.into());
+        // For `--dep` we need to set the env var instead of passing the flag.
+        if !dep {
+            if let Some(target) = &target {
+                early_flags.push("--target".into());
+                early_flags.push(target.into());
+            }
         }
         if verbose {
             early_flags.push("--verbose".into());
@@ -534,7 +537,7 @@ impl Command {
             cmd.set_quiet(!verbose);
             // Add Miri flags
             let mut cmd = cmd.args(&miri_flags).args(&seed_flag).args(&early_flags).args(&flags);
-            // For `--dep` we also need to set the env var.
+            // For `--dep` we need to set the env var instead of passing the flag.
             if dep {
                 if let Some(target) = &target {
                     cmd = cmd.env("MIRI_TEST_TARGET", target);

tests/ui.rs

@@ -106,13 +106,8 @@ fn miri_config(target: &str, path: &str, mode: Mode, with_dependencies: bool) ->
     .map(Spanned::dummy)
     .into();
 
-    config.comment_defaults.base().require_annotations = Spanned::dummy(match mode {
-        Mode::Pass => false,
-        Mode::Fail => true,
-        Mode::RunDep => false,
-        Mode::Panic => false,
-    })
-    .into();
+    config.comment_defaults.base().require_annotations =
+        Spanned::dummy(matches!(mode, Mode::Fail)).into();
 
     config.comment_defaults.base().normalize_stderr =
         stderr_filters().iter().map(|(m, p)| (m.clone(), p.to_vec())).collect();