Revert introduction of [workspace.dependencies].

This was done in #145740 and #145947. It is causing problems for people
using r-a on anything that uses the rustc-dev rustup package, e.g. Miri,
clippy.

This repository has lots of submodules and subtrees and various
different projects are carved out of pieces of it. It seems like
`[workspace.dependencies]` will just be more trouble than it's worth.

Author: nnethercote

Cargo.toml

@@ -59,33 +59,6 @@ exclude = [
   "obj",
 ]
 
-[workspace.dependencies]
-# tidy-alphabetical-start
-bitflags = "2.9.3"
-derive-where = "1.6.0"
-either = "1.15.0"
-indexmap = "2.10.0"
-itertools = "0.12.1"
-# FIXME: Remove this pin once this rustix issue is resolved
-# https://github.com/bytecodealliance/rustix/issues/1496
-libc = "=0.2.174"
-measureme = "12.0.3"
-memchr = "2.7.5"
-odht = { version = "0.3.1", features = ["nightly"] }
-polonius-engine = "0.13.0"
-proc-macro2 = "1.0.101"
-quote = "1.0.40"
-rustc-demangle = "0.1.26"
-rustc-hash = "2.1.1"
-rustc-literal-escaper = "0.0.5"
-rustc_apfloat = "0.2.3"
-scoped-tls = "1.0.1"
-serde_json = "1.0.142"
-tempfile = "3.20.0"
-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)

compiler/rustc_abi/Cargo.toml

@@ -5,7 +5,7 @@ edition = "2024"
 
 [dependencies]
 # tidy-alphabetical-start
-bitflags.workspace = true
+bitflags = "2.4.1"
 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.workspace = true
+tracing = "0.1"
 # tidy-alphabetical-end
 
 [features]

compiler/rustc_ast/Cargo.toml

@@ -5,16 +5,16 @@ edition = "2024"
 
 [dependencies]
 # tidy-alphabetical-start
-bitflags.workspace = true
-memchr.workspace = true
-rustc-literal-escaper.workspace = true
+bitflags = "2.4.1"
+memchr = "2.7.4"
+rustc-literal-escaper = "0.0.5"
 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.workspace = true
-tracing.workspace = true
+thin-vec = "0.2.12"
+tracing = "0.1"
 # tidy-alphabetical-end

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.workspace = true
-tracing.workspace = true
+thin-vec = "0.2.12"
+tracing = "0.1"
 # tidy-alphabetical-end

compiler/rustc_ast_passes/Cargo.toml

@@ -5,7 +5,7 @@ edition = "2024"
 
 [dependencies]
 # tidy-alphabetical-start
-itertools.workspace = true
+itertools = "0.12"
 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.workspace = true
+thin-vec = "0.2.12"
 # tidy-alphabetical-end

compiler/rustc_ast_pretty/Cargo.toml

@@ -5,13 +5,13 @@ edition = "2024"
 
 [dependencies]
 # tidy-alphabetical-start
-itertools.workspace = true
+itertools = "0.12"
 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.workspace = true
+thin-vec = "0.2.12"
 # tidy-alphabetical-end

compiler/rustc_attr_parsing/Cargo.toml

@@ -18,5 +18,5 @@ rustc_parse = { path = "../rustc_parse" }
 rustc_session = { path = "../rustc_session" }
 rustc_span = { path = "../rustc_span" }
 rustc_target = { path = "../rustc_target" }
-thin-vec.workspace = true
+thin-vec = "0.2.12"
 # tidy-alphabetical-end

compiler/rustc_borrowck/Cargo.toml

@@ -5,9 +5,9 @@ edition = "2024"
 
 [dependencies]
 # tidy-alphabetical-start
-either.workspace = true
-itertools.workspace = true
-polonius-engine.workspace = true
+either = "1.5.0"
+itertools = "0.12"
+polonius-engine = "0.13.0"
 rustc_abi = { path = "../rustc_abi" }
 rustc_data_structures = { path = "../rustc_data_structures" }
 rustc_errors = { path = "../rustc_errors" }
@@ -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.workspace = true
+tracing = "0.1"
 # tidy-alphabetical-end

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.workspace = true
-tracing.workspace = true
+thin-vec = "0.2.12"
+tracing = "0.1"
 # tidy-alphabetical-end

compiler/rustc_codegen_llvm/Cargo.toml

@@ -8,15 +8,15 @@ test = false
 
 [dependencies]
 # tidy-alphabetical-start
-bitflags.workspace = true
+bitflags = "2.4.1"
 # 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.workspace = true
-libc.workspace = true
-measureme.workspace = true
+itertools = "0.12"
+libc = "0.2"
+measureme = "12.0.1"
 object = { version = "0.37.0", default-features = false, features = ["std", "read"] }
-rustc-demangle.workspace = true
+rustc-demangle = "0.1.21"
 rustc_abi = { path = "../rustc_abi" }
 rustc_ast = { path = "../rustc_ast" }
 rustc_codegen_ssa = { path = "../rustc_codegen_ssa" }
@@ -38,9 +38,9 @@ rustc_span = { path = "../rustc_span" }
 rustc_symbol_mangling = { path = "../rustc_symbol_mangling" }
 rustc_target = { path = "../rustc_target" }
 serde = { version = "1", features = ["derive"] }
-serde_json.workspace = true
+serde_json = "1"
 smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
-tracing.workspace = true
+tracing = "0.1"
 # tidy-alphabetical-end
 
 [features]