Resolver: Batched Import Resolution

[LorrensP-2158466]

Transforms the current algorithm for resolving imports to a batched algorithm. Every import in the indeterminate_imports set is resolved in isolation. This is the only real difference from the current algorithm.

r? petrochenkov

[LorrensP-2158466]

for now or delete?

[rust-log-analyzer]

The job aarch64-gnu-llvm-19-1 failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot)

+ error: cannot determine resolution for the import
+   --> $DIR/not-allowed.rs:6:5
+    |
+ LL | use test; // OK, imports the built-in attribute macro `#[test]`, but not the `test` crate.
+    |     ^^^^
+ 
1 error[E0432]: unresolved import `alloc`
2   --> $DIR/not-allowed.rs:5:5
3    |
---
-   --> /checkout/tests/ui/rfcs/rfc-2126-extern-absolute-paths/not-allowed.rs:6:5
+ error: cannot determine resolution for the import
+   --> $DIR/not-allowed.rs:6:5
+    |
+ LL | use test; // OK, imports the built-in attribute macro `#[test]`, but not the `test` crate.
+    |     ^^^^
+ 
+ error: aborting due to 2 previous errors


The actual stderr differed from the expected stderr
To update references, rerun the tests and pass the `--bless` flag
To only update this specific test, also pass `--test-args rfcs/rfc-2126-extern-absolute-paths/not-allowed.rs`

error: 1 errors occurred comparing output.
status: exit status: 1
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/rfcs/rfc-2126-extern-absolute-paths/not-allowed.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--check-cfg" "cfg(test,FALSE)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/rfcs/rfc-2126-extern-absolute-paths/not-allowed" "-A" "unused" "-A" "internal_features" "-A" "unused_parens" "-A" "unused_braces" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers" "--edition=2018"
stdout: none
--- stderr -------------------------------
error: cannot determine resolution for the import
##[error]  --> /checkout/tests/ui/rfcs/rfc-2126-extern-absolute-paths/not-allowed.rs:6:5
   |
LL | use test; // OK, imports the built-in attribute macro `#[test]`, but not the `test` crate.
   |     ^^^^

error[E0432]: unresolved import `alloc`
##[error]  --> /checkout/tests/ui/rfcs/rfc-2126-extern-absolute-paths/not-allowed.rs:5:5
   |
LL | use alloc; //~ ERROR unresolved import `alloc`
   |     ^^^^^ no external crate `alloc`
   |
help: consider importing this module instead
   |
LL | use std::alloc; //~ ERROR unresolved import `alloc`
   |     +++++

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0432`.
------------------------------------------


---- [ui] tests/ui/rust-2018/uniform-paths/prelude.rs stdout ----

error: test compilation failed although it shouldn't!
status: exit status: 1
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/rust-2018/uniform-paths/prelude.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--check-cfg" "cfg(test,FALSE)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/rust-2018/uniform-paths/prelude" "-A" "unused" "-A" "internal_features" "-A" "unused_parens" "-A" "unused_braces" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers" "--edition=2018"
stdout: none
--- stderr -------------------------------
error: cannot determine resolution for the import
##[error]  --> /checkout/tests/ui/rust-2018/uniform-paths/prelude.rs:8:5
   |
---
---- [ui] tests/ui/use/import_trait_associated_functions.rs stdout ----

error: test compilation failed although it shouldn't!
status: exit status: 1
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/use/import_trait_associated_functions.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--check-cfg" "cfg(test,FALSE)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/use/import_trait_associated_functions" "-A" "unused" "-A" "internal_features" "-A" "unused_parens" "-A" "unused_braces" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers" "--edition=2018"
stdout: none
--- stderr -------------------------------
error: cannot determine resolution for the import
##[error]  --> /checkout/tests/ui/use/import_trait_associated_functions.rs:8:5
   |
---
   |
LL | use Default::default;
   |     ^^^^^^^^^^^^^^^^
   |
   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`

error: aborting due to 2 previous errors
------------------------------------------