[rust] use 1.90.0 (#5276)

Author: mikea

build/kj_test.bzl

@@ -15,7 +15,6 @@ def kj_test(
         testonly = True,
         srcs = [src],
         deps = [
-            "//deps/rust:runtime",
             "@capnp-cpp//src/kj:kj-test",
         ] + deps,
         linkstatic = select({

build/rust_toolchains.bzl

@@ -3,9 +3,9 @@ load("@rules_rust//rust:repositories.bzl", "rules_rust_dependencies", "rust_regi
 load("@rules_rust//tools/rust_analyzer:deps.bzl", "rust_analyzer_dependencies")
 load("//deps/rust/crates:crates.bzl", "crate_repositories")
 
-RUST_STABLE_VERSION = "1.86.0"  # LLVM 19
+RUST_STABLE_VERSION = "1.90.0"  # LLVM 20
 
-RUST_NIGHTLY_VERSION = "nightly/2025-02-20"
+RUST_NIGHTLY_VERSION = "nightly/2025-09-18"
 
 # List of additional triples to be configured on top of the local platform triple
 RUST_TARGET_TRIPLES = [
@@ -33,6 +33,7 @@ def rust_toolchains():
             RUST_STABLE_VERSION,
             RUST_NIGHTLY_VERSION,
         ],
+        allocator_library = "@workerd//deps/rust:allocator",
     )
 
     for t in RUST_TARGET_TRIPLES:

build/wd_cc_benchmark.bzl

@@ -28,7 +28,6 @@ def wd_cc_benchmark(
         visibility = visibility,
         deps = deps + [
             "@workerd-google-benchmark//:benchmark_main",
-            "//deps/rust:runtime",
             "//src/workerd/tests:bench-tools",
         ],
         # use the same malloc we use for server

build/wd_cc_binary.bzl

@@ -30,9 +30,7 @@ def wd_cc_binary(
             "//conditions:default": [],
         }),
         visibility = visibility,
-        deps = deps + [
-            "//deps/rust:runtime",
-        ],
+        deps = deps,
         **kwargs
     )
 

build/wd_rust_crate.bzl

@@ -111,7 +111,7 @@ def wd_rust_crate(
         name = name,
         crate_name = crate_name,
         srcs = srcs,
-        deps = deps,
+        deps = deps + ["@workerd//deps/rust:runtime"],
         visibility = visibility,
         data = data,
         proc_macro_deps = proc_macro_deps,

deps/rust/BUILD.bazel

@@ -88,10 +88,7 @@ cc_library(
         "//conditions:default": [],
     }),
     visibility = ["//visibility:public"],
-    deps = select({
-        "@platforms//os:windows": [":empty_lib"],
-        "//conditions:default": [],
-    }),
+    deps = [":empty_lib"],
 )
 
 write_file(
@@ -111,3 +108,8 @@ rust_static_library(
     stamp = -1,  # default to bazel --stamp flag
     tags = ["manual"],
 )
+
+cc_library(
+    name = "allocator",
+    visibility = ["//visibility:public"],
+)

src/rust/cxx-integration-test/lib.rs

@@ -1,7 +1,6 @@
 //! Non-production crate to help test various aspects of rust/c++ integration.
 
 use std::io::Error;
-use std::io::ErrorKind;
 use std::pin::Pin;
 use std::time::Duration;
 
@@ -100,7 +99,7 @@ fn result_ok() -> Result<i32> {
 }
 
 fn result_error() -> Result<i32> {
-    Err(Error::new(ErrorKind::Other, "test error"))
+    Err(Error::other("test error"))
 }
 
 fn log_every_level() {

src/rust/kj/http.rs

@@ -14,7 +14,7 @@ use crate::io::AsyncIoStream;
 #[cxx::bridge(namespace = "kj::rust")]
 #[expect(clippy::missing_panics_doc)]
 #[expect(clippy::missing_safety_doc)]
-#[expect(clippy::needless_lifetimes)]
+#[expect(clippy::elidable_lifetime_names)]
 pub mod ffi {
     unsafe extern "C++" {
         include!("workerd/rust/kj/ffi.h");

src/workerd/server/BUILD.bazel

@@ -182,7 +182,6 @@ wd_cc_library(
         ":fallback-service",
         ":workerd-api",
         ":workerd_capnp",
-        "//deps/rust:runtime",
         "//src/cloudflare",
         "//src/node",
         "//src/pyodide:pyodide_static",