rust-lang · bors · Aug 27, 2025 · Aug 1, 2025 · Aug 18, 2025 · Aug 18, 2025
diff --git a/Cargo.toml b/Cargo.toml
@@ -59,6 +59,16 @@ exclude = [
   "obj",
 ]
 
+[workspace.dependencies]
+# tidy-alphabetical-start
+bitflags = "2.9.3"
+itertools = "0.12.1"
+memchr = "2.7.5"
+rustc-literal-escaper = "0.0.5"
+thin-vec = "0.2.14"
+tracing = "0.1.37"
+# tidy-alphabetical-end
+
 [profile.release.package.rustc_thread_pool]
 # The rustc fork of Rayon has deadlock detection code which intermittently
 # causes overflows in the CI (see https://github.com/rust-lang/rust/issues/90227)

diff --git a/compiler/rustc_abi/Cargo.toml b/compiler/rustc_abi/Cargo.toml
@@ -5,7 +5,7 @@ edition = "2024"
 
 [dependencies]
 # tidy-alphabetical-start
-bitflags = "2.4.1"
+bitflags.workspace = true
 rand = { version = "0.9.0", default-features = false, optional = true }
 rand_xoshiro = { version = "0.7.0", optional = true }
 rustc_data_structures = { path = "../rustc_data_structures", optional = true }
@@ -15,7 +15,7 @@ rustc_index = { path = "../rustc_index", default-features = false }
 rustc_macros = { path = "../rustc_macros", optional = true }
 rustc_serialize = { path = "../rustc_serialize", optional = true }
 rustc_span = { path = "../rustc_span", optional = true }
-tracing = "0.1"
+tracing.workspace = true
 # tidy-alphabetical-end
 
 [features]

diff --git a/compiler/rustc_ast/Cargo.toml b/compiler/rustc_ast/Cargo.toml
@@ -5,16 +5,16 @@ edition = "2024"
 
 [dependencies]
 # tidy-alphabetical-start
-bitflags = "2.4.1"
-memchr = "2.7.4"
-rustc-literal-escaper = "0.0.5"
+bitflags.workspace = true
+memchr.workspace = true
+rustc-literal-escaper.workspace = true
 rustc_ast_ir = { path = "../rustc_ast_ir" }
 rustc_data_structures = { path = "../rustc_data_structures" }
 rustc_index = { path = "../rustc_index" }
 rustc_macros = { path = "../rustc_macros" }
 rustc_serialize = { path = "../rustc_serialize" }
 rustc_span = { path = "../rustc_span" }
 smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
-thin-vec = "0.2.12"
+thin-vec.workspace = true
 tracing = "0.1"
 # tidy-alphabetical-end
diff --git a/compiler/rustc_ast_lowering/Cargo.toml b/compiler/rustc_ast_lowering/Cargo.toml
@@ -24,6 +24,6 @@ rustc_session = { path = "../rustc_session" }
 rustc_span = { path = "../rustc_span" }
 rustc_target = { path = "../rustc_target" }
 smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
-thin-vec = "0.2.12"
-tracing = "0.1"
+thin-vec.workspace = true
+tracing.workspace = true
 # tidy-alphabetical-end
diff --git a/compiler/rustc_ast_passes/Cargo.toml b/compiler/rustc_ast_passes/Cargo.toml
@@ -5,7 +5,7 @@ edition = "2024"
 
 [dependencies]
 # tidy-alphabetical-start
-itertools = "0.12"
+itertools.workspace = true
 rustc_abi = { path = "../rustc_abi" }
 rustc_ast = { path = "../rustc_ast" }
 rustc_ast_pretty = { path = "../rustc_ast_pretty" }
@@ -18,5 +18,5 @@ rustc_macros = { path = "../rustc_macros" }
 rustc_session = { path = "../rustc_session" }
 rustc_span = { path = "../rustc_span" }
 rustc_target = { path = "../rustc_target" }
-thin-vec = "0.2.12"
+thin-vec.workspace = true
 # tidy-alphabetical-end
diff --git a/compiler/rustc_ast_pretty/Cargo.toml b/compiler/rustc_ast_pretty/Cargo.toml
@@ -5,13 +5,13 @@ edition = "2024"
 
 [dependencies]
 # tidy-alphabetical-start
-itertools = "0.12"
+itertools.workspace = true
 rustc_ast = { path = "../rustc_ast" }
 rustc_lexer = { path = "../rustc_lexer" }
 rustc_span = { path = "../rustc_span" }
 # tidy-alphabetical-end
 
 [dev-dependencies]
 # tidy-alphabetical-start
-thin-vec = "0.2.12"
+thin-vec.workspace = true
 # tidy-alphabetical-end
diff --git a/compiler/rustc_attr_parsing/Cargo.toml b/compiler/rustc_attr_parsing/Cargo.toml
@@ -17,5 +17,5 @@ rustc_macros = { path = "../rustc_macros" }
 rustc_parse = { path = "../rustc_parse" }
 rustc_session = { path = "../rustc_session" }
 rustc_span = { path = "../rustc_span" }
-thin-vec = "0.2.12"
+thin-vec.workspace = true
 # tidy-alphabetical-end
diff --git a/compiler/rustc_borrowck/Cargo.toml b/compiler/rustc_borrowck/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2024"
 [dependencies]
 # tidy-alphabetical-start
 either = "1.5.0"
-itertools = "0.12"
+itertools.workspace = true
 polonius-engine = "0.13.0"
 rustc_abi = { path = "../rustc_abi" }
 rustc_data_structures = { path = "../rustc_data_structures" }
@@ -25,5 +25,5 @@ rustc_span = { path = "../rustc_span" }
 rustc_trait_selection = { path = "../rustc_trait_selection" }
 rustc_traits = { path = "../rustc_traits" }
 smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
-tracing = "0.1"
+tracing.workspace = true
 # tidy-alphabetical-end
diff --git a/compiler/rustc_builtin_macros/Cargo.toml b/compiler/rustc_builtin_macros/Cargo.toml
@@ -30,6 +30,6 @@ rustc_session = { path = "../rustc_session" }
 rustc_span = { path = "../rustc_span" }
 rustc_target = { path = "../rustc_target" }
 smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
-thin-vec = "0.2.12"
-tracing = "0.1"
+thin-vec.workspace = true
+tracing.workspace = true
 # tidy-alphabetical-end
diff --git a/compiler/rustc_builtin_macros/src/format_foreign.rs b/compiler/rustc_builtin_macros/src/format_foreign.rs
@@ -416,7 +416,7 @@ pub(crate) mod printf {
                         // Yes, this *is* the parameter.
                         Some(('$', end2)) => {
                             state = Flags;
-                            parameter = Some(at.slice_between(end).unwrap().parse().unwrap());
+                            parameter = at.slice_between(end).unwrap().parse().ok();
                             move_to!(end2);
                         }
                         // Wait, no, actually, it's the width.

diff --git a/compiler/rustc_codegen_llvm/Cargo.toml b/compiler/rustc_codegen_llvm/Cargo.toml
@@ -8,11 +8,11 @@ test = false
 
 [dependencies]
 # tidy-alphabetical-start
-bitflags = "2.4.1"
+bitflags.workspace = true
 # To avoid duplicate dependencies, this should match the version of gimli used
 # by `rustc_codegen_ssa` via its `thorin-dwp` dependency.
 gimli = "0.31"
-itertools = "0.12"
+itertools.workspace = true
 libc = "0.2"
 measureme = "12.0.1"
 object = { version = "0.37.0", default-features = false, features = ["std", "read"] }
@@ -40,7 +40,7 @@ rustc_target = { path = "../rustc_target" }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
-tracing = "0.1"
+tracing.workspace = true
 # tidy-alphabetical-end
 
 [features]

diff --git a/compiler/rustc_codegen_ssa/Cargo.toml b/compiler/rustc_codegen_ssa/Cargo.toml
@@ -6,12 +6,12 @@ edition = "2024"
 [dependencies]
 # tidy-alphabetical-start
 ar_archive_writer = "0.4.2"
-bitflags = "2.4.1"
+bitflags.workspace = true
 bstr = "1.11.3"
 # `cc` updates often break things, so we pin it here. Cargo enforces "max 1 semver-compat version
 # per crate", so if you change this, you need to also change it in `rustc_llvm`.
 cc = "=1.2.16"
-itertools = "0.12"
+itertools.workspace = true
 pathdiff = "0.2.0"
 regex = "1.4"
 rustc_abi = { path = "../rustc_abi" }
@@ -40,9 +40,9 @@ rustc_trait_selection = { path = "../rustc_trait_selection" }
 serde_json = "1.0.59"
 smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
 tempfile = "3.2"
-thin-vec = "0.2.12"
+thin-vec.workspace = true
 thorin-dwp = "0.9"
-tracing = "0.1"
+tracing.workspace = true
 wasm-encoder = "0.219"
 # tidy-alphabetical-end
 

diff --git a/compiler/rustc_const_eval/Cargo.toml b/compiler/rustc_const_eval/Cargo.toml
@@ -22,5 +22,5 @@ rustc_session = { path = "../rustc_session" }
 rustc_span = { path = "../rustc_span" }
 rustc_target = { path = "../rustc_target" }
 rustc_trait_selection = { path = "../rustc_trait_selection" }
-tracing = "0.1"
+tracing.workspace = true
 # tidy-alphabetical-end
diff --git a/compiler/rustc_data_structures/Cargo.toml b/compiler/rustc_data_structures/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2024"
 [dependencies]
 # tidy-alphabetical-start
 arrayvec = { version = "0.7", default-features = false }
-bitflags = "2.4.1"
+bitflags.workspace = true
 either = "1.0"
 elsa = "1.11.0"
 ena = "0.14.3"
@@ -25,8 +25,8 @@ rustc_thread_pool = { path = "../rustc_thread_pool" }
 smallvec = { version = "1.8.1", features = ["const_generics", "union", "may_dangle"] }
 stacker = "0.1.17"
 tempfile = "3.2"
-thin-vec = "0.2.12"
-tracing = "0.1"
+thin-vec.workspace = true
+tracing.workspace = true
 # tidy-alphabetical-end
 
 [dependencies.hashbrown]

diff --git a/compiler/rustc_driver_impl/Cargo.toml b/compiler/rustc_driver_impl/Cargo.toml
@@ -51,7 +51,7 @@ rustc_trait_selection = { path = "../rustc_trait_selection" }
 rustc_ty_utils = { path = "../rustc_ty_utils" }
 serde_json = "1.0.59"
 shlex = "1.0"
-tracing = { version = "0.1.35" }
+tracing.workspace = true
 # tidy-alphabetical-end
 
 [target.'cfg(all(unix, any(target_env = "gnu", target_os = "macos")))'.dependencies]

diff --git a/compiler/rustc_error_messages/Cargo.toml b/compiler/rustc_error_messages/Cargo.toml
@@ -18,6 +18,6 @@ rustc_data_structures = { path = "../rustc_data_structures" }
 rustc_macros = { path = "../rustc_macros" }
 rustc_serialize = { path = "../rustc_serialize" }
 rustc_span = { path = "../rustc_span" }
-tracing = "0.1"
+tracing.workspace = true
 unic-langid = { version = "0.9.0", features = ["macros"] }
 # tidy-alphabetical-end
diff --git a/compiler/rustc_errors/Cargo.toml b/compiler/rustc_errors/Cargo.toml
@@ -24,7 +24,7 @@ serde = { version = "1.0.125", features = ["derive"] }
 serde_json = "1.0.59"
 termcolor = "1.2.0"
 termize = "0.2"
-tracing = "0.1"
+tracing.workspace = true
 # tidy-alphabetical-end
 
 [target.'cfg(windows)'.dependencies.windows]

diff --git a/compiler/rustc_expand/Cargo.toml b/compiler/rustc_expand/Cargo.toml
@@ -29,6 +29,6 @@ rustc_serialize = { path = "../rustc_serialize" }
 rustc_session = { path = "../rustc_session" }
 rustc_span = { path = "../rustc_span" }
 smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
-thin-vec = "0.2.12"
-tracing = "0.1"
+thin-vec.workspace = true
+tracing.workspace = true
 # tidy-alphabetical-end
diff --git a/compiler/rustc_hir/Cargo.toml b/compiler/rustc_hir/Cargo.toml
@@ -5,7 +5,7 @@ edition = "2024"
 
 [dependencies]
 # tidy-alphabetical-start
-bitflags = "2.9.1"
+bitflags.workspace = true
 odht = { version = "0.3.1", features = ["nightly"] }
 rustc_abi = { path = "../rustc_abi" }
 rustc_arena = { path = "../rustc_arena" }
@@ -21,6 +21,6 @@ rustc_serialize = { path = "../rustc_serialize" }
 rustc_span = { path = "../rustc_span" }
 rustc_target = { path = "../rustc_target" }
 smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
-thin-vec = "0.2.12"
-tracing = "0.1"
+thin-vec.workspace = true
+tracing.workspace = true
 # tidy-alphabetical-end
diff --git a/compiler/rustc_hir_analysis/Cargo.toml b/compiler/rustc_hir_analysis/Cargo.toml
@@ -9,7 +9,7 @@ doctest = false
 
 [dependencies]
 # tidy-alphabetical-start
-itertools = "0.12"
+itertools.workspace = true
 rustc_abi = { path = "../rustc_abi" }
 rustc_arena = { path = "../rustc_arena" }
 rustc_ast = { path = "../rustc_ast" }
@@ -29,5 +29,5 @@ rustc_span = { path = "../rustc_span" }
 rustc_target = { path = "../rustc_target" }
 rustc_trait_selection = { path = "../rustc_trait_selection" }
 smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
-tracing = "0.1"
+tracing.workspace = true
 # tidy-alphabetical-end
diff --git a/compiler/rustc_hir_typeck/Cargo.toml b/compiler/rustc_hir_typeck/Cargo.toml
@@ -5,7 +5,7 @@ edition = "2024"
 
 [dependencies]
 # tidy-alphabetical-start
-itertools = "0.12"
+itertools.workspace = true
 rustc_abi = { path = "../rustc_abi" }
 rustc_ast = { path = "../rustc_ast" }
 rustc_attr_parsing = { path = "../rustc_attr_parsing" }
@@ -25,5 +25,5 @@ rustc_span = { path = "../rustc_span" }
 rustc_target = { path = "../rustc_target" }
 rustc_trait_selection = { path = "../rustc_trait_selection" }
 smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
-tracing = "0.1"
+tracing.workspace = true
 # tidy-alphabetical-end
diff --git a/compiler/rustc_incremental/Cargo.toml b/compiler/rustc_incremental/Cargo.toml
@@ -19,6 +19,6 @@ rustc_middle = { path = "../rustc_middle" }
 rustc_serialize = { path = "../rustc_serialize" }
 rustc_session = { path = "../rustc_session" }
 rustc_span = { path = "../rustc_span" }
-thin-vec = "0.2.12"
-tracing = "0.1"
+thin-vec.workspace = true
+tracing.workspace = true
 # tidy-alphabetical-end
diff --git a/compiler/rustc_infer/Cargo.toml b/compiler/rustc_infer/Cargo.toml
@@ -18,6 +18,6 @@ rustc_middle = { path = "../rustc_middle" }
 rustc_span = { path = "../rustc_span" }
 rustc_type_ir = { path = "../rustc_type_ir" }
 smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
-thin-vec = "0.2.12"
-tracing = "0.1"
+thin-vec.workspace = true
+tracing.workspace = true
 # tidy-alphabetical-end
diff --git a/compiler/rustc_interface/Cargo.toml b/compiler/rustc_interface/Cargo.toml
@@ -46,7 +46,7 @@ rustc_thread_pool = { path = "../rustc_thread_pool" }
 rustc_trait_selection = { path = "../rustc_trait_selection" }
 rustc_traits = { path = "../rustc_traits" }
 rustc_ty_utils = { path = "../rustc_ty_utils" }
-tracing = "0.1"
+tracing.workspace = true
 # tidy-alphabetical-end
 
 [dev-dependencies]

diff --git a/compiler/rustc_lexer/Cargo.toml b/compiler/rustc_lexer/Cargo.toml
@@ -14,7 +14,7 @@ Rust lexer used by rustc. No stability guarantees are provided.
 
 # Note that this crate purposefully does not depend on other rustc crates
 [dependencies]
-memchr = "2.7.4"
+memchr.workspace = true
 unicode-xid = "0.2.0"
 
 [dependencies.unicode-properties]

diff --git a/compiler/rustc_lint/Cargo.toml b/compiler/rustc_lint/Cargo.toml
@@ -24,6 +24,6 @@ rustc_span = { path = "../rustc_span" }
 rustc_target = { path = "../rustc_target" }
 rustc_trait_selection = { path = "../rustc_trait_selection" }
 smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
-tracing = "0.1"
+tracing.workspace = true
 unicode-security = "0.1.0"
 # tidy-alphabetical-end
diff --git a/compiler/rustc_log/Cargo.toml b/compiler/rustc_log/Cargo.toml
@@ -5,10 +5,10 @@ edition = "2024"
 
 [dependencies]
 # tidy-alphabetical-start
-tracing = "0.1.28"
 tracing-core = "=0.1.30" # FIXME(Nilstrieb) tracing has a deadlock: https://github.com/tokio-rs/tracing/issues/2635
 tracing-subscriber = { version = "0.3.3", default-features = false, features = ["fmt", "env-filter", "smallvec", "parking_lot", "ansi"] }
 tracing-tree = "0.3.1"
+tracing.workspace = true
 # tidy-alphabetical-end
 
 [features]

diff --git a/compiler/rustc_metadata/Cargo.toml b/compiler/rustc_metadata/Cargo.toml
@@ -5,7 +5,7 @@ edition = "2024"
 
 [dependencies]
 # tidy-alphabetical-start
-bitflags = "2.4.1"
+bitflags.workspace = true
 libloading = "0.8.0"
 odht = { version = "0.3.1", features = ["nightly"] }
 rustc_abi = { path = "../rustc_abi" }
@@ -31,7 +31,7 @@ rustc_session = { path = "../rustc_session" }
 rustc_span = { path = "../rustc_span" }
 rustc_target = { path = "../rustc_target" }
 tempfile = "3.7.1"
-tracing = "0.1"
+tracing.workspace = true
 # tidy-alphabetical-end
 
 [target.'cfg(target_os = "aix")'.dependencies]

diff --git a/compiler/rustc_middle/Cargo.toml b/compiler/rustc_middle/Cargo.toml
@@ -5,7 +5,7 @@ edition = "2024"
 
 [dependencies]
 # tidy-alphabetical-start
-bitflags = "2.4.1"
+bitflags.workspace = true
 either = "1.5.0"
 gsgdt = "0.1.2"
 polonius-engine = "0.13.0"
@@ -34,8 +34,8 @@ rustc_target = { path = "../rustc_target" }
 rustc_thread_pool = { path = "../rustc_thread_pool" }
 rustc_type_ir = { path = "../rustc_type_ir" }
 smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
-thin-vec = "0.2.12"
-tracing = "0.1"
+thin-vec.workspace = true
+tracing.workspace = true
 # tidy-alphabetical-end
 
 [features]