Rollup merge of #159974 - panstromek:update-thin-vec, r=mejrs

Update thinvec to 0.2.19

It contains `may_dangle` Drop impl under a feature flag. This allows us to use it in a lot more places, notable in types that hold `&'tcx` references. This would previously fail in borrowck in arena code.

We have to enable  its "unstable" feature for this. That also enables `TrustedLen` impl, which is behind unstable flag, too. I left the flag disabled, because it regressed next-solver benchmarks, but that will be fixed in PR that needs this flag (see the comment: #159974 (comment))

Author: JonathanBrouwer

Cargo.lock

@@ -5575,9 +5575,9 @@ dependencies = [
 
 [[package]]
 name = "thin-vec"
-version = "0.2.18"
+version = "0.2.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0f7e269b48f0a7dd0146680fa24b50cc67fc0373f086a5b2f99bd084639b482"
+checksum = "79def32ffcd477db1ff26f76dab9e3a91f0bd42a85ca96577089b24623056f9d"
 
 [[package]]
 name = "thiserror"

compiler/rustc_ast/Cargo.toml

@@ -15,6 +15,6 @@ 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 = "0.2.18"
+thin-vec = "0.2.19"
 tracing = "0.1"
 # tidy-alphabetical-end

compiler/rustc_ast_lowering/Cargo.toml

@@ -22,6 +22,6 @@ 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 = "0.2.18"
+thin-vec = "0.2.19"
 tracing = "0.1"
 # tidy-alphabetical-end

compiler/rustc_ast_pretty/Cargo.toml

@@ -13,5 +13,5 @@ rustc_span = { path = "../rustc_span" }
 
 [dev-dependencies]
 # tidy-alphabetical-start
-thin-vec = "0.2.18"
+thin-vec = "0.2.19"
 # tidy-alphabetical-end

compiler/rustc_attr_parsing/Cargo.toml

@@ -20,5 +20,5 @@ rustc_parse_format = { path = "../rustc_parse_format" }
 rustc_session = { path = "../rustc_session" }
 rustc_span = { path = "../rustc_span" }
 rustc_target = { path = "../rustc_target" }
-thin-vec = "0.2.18"
+thin-vec = "0.2.19"
 # tidy-alphabetical-end

compiler/rustc_builtin_macros/Cargo.toml

@@ -29,7 +29,7 @@ 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 = "0.2.18"
+thin-vec = "0.2.19"
 tracing = "0.1"
 # tidy-alphabetical-end
 

compiler/rustc_data_structures/Cargo.toml

@@ -30,7 +30,7 @@ smallvec = { version = "1.8.1", features = [
 ] }
 stacker = "0.1.17"
 tempfile = "3.2"
-thin-vec = "0.2.18"
+thin-vec = "0.2.19"
 tracing = "0.1"
 # tidy-alphabetical-end
 

compiler/rustc_expand/Cargo.toml

@@ -30,6 +30,6 @@ rustc_session = { path = "../rustc_session" }
 rustc_span = { path = "../rustc_span" }
 scoped-tls = "1.0"
 smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
-thin-vec = "0.2.18"
+thin-vec = "0.2.19"
 tracing = "0.1"
 # tidy-alphabetical-end

compiler/rustc_hir/Cargo.toml

@@ -23,6 +23,6 @@ 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 = "0.2.18"
+thin-vec = "0.2.19"
 tracing = "0.1"
 # tidy-alphabetical-end

compiler/rustc_infer/Cargo.toml

@@ -17,6 +17,6 @@ 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 = "0.2.18"
+thin-vec = "0.2.19"
 tracing = "0.1"
 # tidy-alphabetical-end