Rollup merge of #124840 - bvanjoi:fix-124490, r=petrochenkov

resolve: mark it undetermined if single import is not has any bindings

- Fixes #124490
- Fixes #125013

This issue arises from incorrect resolution updates, for example:

```rust
mod a {
    pub mod b {
        pub mod c {}
    }
}

use a::*;

use b::c;
use c as b;

fn main() {}
```

1. In the first loop, binding `(root, b)` is refer to `root:🅰️:b` due to `use a::*`.
    1. However, binding `(root, c)` isn't defined by `use b::c` during this stage because `use c as b` falls under the `single_imports` of `(root, b)`, where the `imported_module` hasn't been computed yet. This results in marking the `path_res` for `b` as `Indeterminate`.
    2. Then, the `imported_module` for `use c as b` will be recorded.
2. In the second loop, `use b::c` will be processed again:
    1. Firstly, it attempts to find the `path_res` for `(root, b)`.
    2. It will iterate through the `single_imports` of `use b::c`, encounter `use c as b`, attempt to resolve `c` in `root`, and ultimately return `Err(Undetermined)`, thus passing the iterator.
    3. Use the binding `(root, b)` -> `root:🅰️:b` introduced by `use a::*` and ultimately return `root:🅰️:b` as the `path_res` of `b`.
    4. Then define the binding `(root, c)` -> `root:🅰️🅱️:c`.
3. Then process `use c as b`, update the resolution for `(root, b)` to refer to `root:🅰️🅱️:c`, ultimately causing inconsistency.

In my view, step `2.2` has an issue where it should exit early, similar to the behavior when there's no `imported_module`. Therefore, I've added an attribute called `indeterminate` to `ImportData`. This will help us handle only those single imports that have at least one determined binding.

r? ``@petrochenkov``

compiler/rustc_resolve/src/ident.rs

@@ -965,6 +965,21 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> {
         // if it can then our result is not determined and can be invalidated.
         for single_import in &resolution.single_imports {
             let Some(import_vis) = single_import.vis.get() else {
+                // This branch handles a cycle in single imports, which occurs
+                // when we've previously captured the `vis` value during an import
+                // process.
+                //
+                // For example:
+                // ```
+                // use a::b;
+                // use b as a;
+                // ```
+                // 1. Steal the `vis` in `use a::b` and attempt to locate `a` in the
+                //    current module.
+                // 2. Encounter the import `use b as a`, which is a `single_import` for `a`,
+                //    and try to find `b` in the current module.
+                // 3. Re-encounter the `use a::b` import since it's a `single_import` of `b`.
+                //    This leads to entering this branch.
                 continue;
             };
             if !self.is_accessible_from(import_vis, parent_scope.module) {
@@ -979,15 +994,25 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> {
                 // named imports.
                 continue;
             }
+
             let Some(module) = single_import.imported_module.get() else {
                 return Err((Undetermined, Weak::No));
             };
-            let ImportKind::Single { source: ident, .. } = single_import.kind else {
+            let ImportKind::Single { source: ident, source_bindings, .. } = &single_import.kind
+            else {
                 unreachable!();
             };
+            if binding.map_or(false, |binding| binding.module().is_some())
+                && source_bindings.iter().all(|binding| matches!(binding.get(), Err(Undetermined)))
+            {
+                // This branch allows the binding to be defined or updated later,
+                // avoiding module inconsistency between the resolve process and the finalize process.
+                // See more details in #124840
+                return Err((Undetermined, Weak::No));
+            }
             match self.resolve_ident_in_module(
                 module,
-                ident,
+                *ident,
                 ns,
                 &single_import.parent_scope,
                 None,

compiler/rustc_resolve/src/imports.rs

@@ -352,9 +352,9 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> {
                     (old_glob @ true, false) | (old_glob @ false, true) => {
                         let (glob_binding, nonglob_binding) =
                             if old_glob { (old_binding, binding) } else { (binding, old_binding) };
-                        if glob_binding.res() != nonglob_binding.res()
-                            && key.ns == MacroNS
+                        if key.ns == MacroNS
                             && nonglob_binding.expansion != LocalExpnId::ROOT
+                            && glob_binding.res() != nonglob_binding.res()
                         {
                             resolution.binding = Some(this.ambiguity(
                                 AmbiguityKind::GlobVsExpanded,