Upgrade rust/crates/tokio-macros to 1.2.0

Test: make
Change-Id: I337f3950298a816b6df5d1a778db0c91c2b90293
diff --git a/.cargo_vcs_info.json b/.cargo_vcs_info.json
index 482e2e5..6934779 100644
--- a/.cargo_vcs_info.json
+++ b/.cargo_vcs_info.json
@@ -1,5 +1,5 @@
 {
   "git": {
-    "sha1": "d41882e2a18ea4459d8f3a3c7ba61c4c20b806b4"
+    "sha1": "3a659c47c33f0d8ccdebbdce320610dc8814fae0"
   }
 }
diff --git a/Android.bp b/Android.bp
index d1a58e1..8f64d8b 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1,4 +1,5 @@
 // This file is generated by cargo2android.py --run --dependencies --tests.
+// Do not modify this file as changes will be overridden on upgrade.
 
 package {
     default_applicable_licenses: ["external_rust_crates_tokio-macros_license"],
@@ -52,22 +53,22 @@
 //   bytes-1.0.1 "default,std"
 //   cfg-if-1.0.0
 //   instant-0.1.9
-//   libc-0.2.86 "align,default,std"
-//   lock_api-0.4.2
+//   libc-0.2.94 "default,std"
+//   lock_api-0.4.4
 //   log-0.4.14
-//   memchr-2.3.4 "default,std"
-//   mio-0.7.7 "default,net,os-ext,os-poll,os-util,tcp,udp,uds"
+//   memchr-2.4.0 "default,std"
+//   mio-0.7.11 "default,net,os-ext,os-poll,os-util,tcp,udp,uds"
 //   num_cpus-1.13.0
-//   once_cell-1.5.2 "alloc,default,std"
+//   once_cell-1.7.2 "alloc,default,race,std"
 //   parking_lot-0.11.1 "default"
-//   parking_lot_core-0.8.2
-//   pin-project-lite-0.2.4
-//   proc-macro2-1.0.24 "default,proc-macro"
-//   quote-1.0.8 "default,proc-macro"
+//   parking_lot_core-0.8.3
+//   pin-project-lite-0.2.6
+//   proc-macro2-1.0.26 "default,proc-macro"
+//   quote-1.0.9 "default,proc-macro"
 //   scopeguard-1.1.0
 //   signal-hook-registry-1.3.0
 //   smallvec-1.6.1
-//   syn-1.0.60 "clone-impls,default,derive,full,parsing,printing,proc-macro,quote"
-//   tokio-1.2.0 "bytes,default,fs,full,io-std,io-util,libc,macros,memchr,mio,net,num_cpus,once_cell,parking_lot,process,rt,rt-multi-thread,signal,signal-hook-registry,sync,time,tokio-macros,winapi"
-//   tokio-macros-1.1.0
-//   unicode-xid-0.2.1 "default"
+//   syn-1.0.72 "clone-impls,default,derive,full,parsing,printing,proc-macro,quote"
+//   tokio-1.6.0 "bytes,default,fs,full,io-std,io-util,libc,macros,memchr,mio,net,num_cpus,once_cell,parking_lot,process,rt,rt-multi-thread,signal,signal-hook-registry,sync,time,tokio-macros,winapi"
+//   tokio-macros-1.2.0
+//   unicode-xid-0.2.2 "default"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6760b17..6df34c0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,13 @@
+# 1.2.0 (May 14, 2021)
+
+- macros: forward input arguments in `#[tokio::test]` ([#3691])
+- macros: improve diagnostics on type mismatch ([#3766])
+- macros: various error message improvements ([#3677])
+
+[#3677]: https://github.com/tokio-rs/tokio/pull/3677
+[#3691]: https://github.com/tokio-rs/tokio/pull/3691
+[#3766]: https://github.com/tokio-rs/tokio/pull/3766
+
 # 1.1.0 (February 5, 2021)
 
 - add `start_paused` option to macros ([#3492])
diff --git a/Cargo.toml b/Cargo.toml
index 8309bec..b44cd93 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,11 +13,11 @@
 [package]
 edition = "2018"
 name = "tokio-macros"
-version = "1.1.0"
+version = "1.2.0"
 authors = ["Tokio Contributors <team@tokio.rs>"]
 description = "Tokio's proc macros.\n"
 homepage = "https://tokio.rs"
-documentation = "https://docs.rs/tokio-macros/1.1.0/tokio_macros"
+documentation = "https://docs.rs/tokio-macros/1.2.0/tokio_macros"
 categories = ["asynchronous"]
 license = "MIT"
 repository = "https://github.com/tokio-rs/tokio"
@@ -33,7 +33,7 @@
 version = "1"
 
 [dependencies.syn]
-version = "1.0.3"
+version = "1.0.56"
 features = ["full"]
 [dev-dependencies.tokio]
 version = "1.0.0"
diff --git a/Cargo.toml.orig b/Cargo.toml.orig
index ea7b2de..875ceb6 100644
--- a/Cargo.toml.orig
+++ b/Cargo.toml.orig
@@ -2,18 +2,17 @@
 name = "tokio-macros"
 # When releasing to crates.io:
 # - Remove path dependencies
-# - Update html_root_url.
 # - Update doc url
 #   - Cargo.toml
 # - Update CHANGELOG.md.
 # - Create "tokio-macros-1.0.x" git tag.
-version = "1.1.0"
+version = "1.2.0"
 edition = "2018"
 authors = ["Tokio Contributors <team@tokio.rs>"]
 license = "MIT"
 repository = "https://github.com/tokio-rs/tokio"
 homepage = "https://tokio.rs"
-documentation = "https://docs.rs/tokio-macros/1.1.0/tokio_macros"
+documentation = "https://docs.rs/tokio-macros/1.2.0/tokio_macros"
 description = """
 Tokio's proc macros.
 """
@@ -27,7 +26,7 @@
 [dependencies]
 proc-macro2 = "1.0.7"
 quote = "1"
-syn = { version = "1.0.3", features = ["full"] }
+syn = { version = "1.0.56", features = ["full"] }
 
 [dev-dependencies]
 tokio = { version = "1.0.0", path = "../tokio", features = ["full"] }
diff --git a/LICENSE b/LICENSE
index 6c6df9c..e4f802a 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright (c) 2020 Tokio Contributors
+Copyright (c) 2021 Tokio Contributors
 
 Permission is hereby granted, free of charge, to any
 person obtaining a copy of this software and associated
diff --git a/METADATA b/METADATA
index ce4408e..6cb3343 100644
--- a/METADATA
+++ b/METADATA
@@ -7,13 +7,13 @@
   }
   url {
     type: ARCHIVE
-    value: "https://static.crates.io/crates/tokio-macros/tokio-macros-1.1.0.crate"
+    value: "https://static.crates.io/crates/tokio-macros/tokio-macros-1.2.0.crate"
   }
-  version: "1.1.0"
+  version: "1.2.0"
   license_type: NOTICE
   last_upgrade_date {
     year: 2021
-    month: 2
-    day: 9
+    month: 5
+    day: 19
   }
 }
diff --git a/TEST_MAPPING b/TEST_MAPPING
new file mode 100644
index 0000000..686fbda
--- /dev/null
+++ b/TEST_MAPPING
@@ -0,0 +1,119 @@
+// Generated by update_crate_tests.py for tests that depend on this crate.
+{
+  "presubmit": [
+    {
+      "name": "doh_unit_test"
+    },
+    {
+      "name": "futures-util_device_test_src_lib"
+    },
+    {
+      "name": "tokio-test_device_test_src_lib"
+    },
+    {
+      "name": "tokio-test_device_test_tests_block_on"
+    },
+    {
+      "name": "tokio-test_device_test_tests_io"
+    },
+    {
+      "name": "tokio-test_device_test_tests_macros"
+    },
+    {
+      "name": "tokio_device_test_tests_buffered"
+    },
+    {
+      "name": "tokio_device_test_tests_io_async_read"
+    },
+    {
+      "name": "tokio_device_test_tests_io_copy_bidirectional"
+    },
+    {
+      "name": "tokio_device_test_tests_io_lines"
+    },
+    {
+      "name": "tokio_device_test_tests_io_mem_stream"
+    },
+    {
+      "name": "tokio_device_test_tests_io_read"
+    },
+    {
+      "name": "tokio_device_test_tests_io_read_buf"
+    },
+    {
+      "name": "tokio_device_test_tests_io_read_to_end"
+    },
+    {
+      "name": "tokio_device_test_tests_io_take"
+    },
+    {
+      "name": "tokio_device_test_tests_io_write"
+    },
+    {
+      "name": "tokio_device_test_tests_io_write_all"
+    },
+    {
+      "name": "tokio_device_test_tests_io_write_buf"
+    },
+    {
+      "name": "tokio_device_test_tests_io_write_int"
+    },
+    {
+      "name": "tokio_device_test_tests_macros_join"
+    },
+    {
+      "name": "tokio_device_test_tests_no_rt"
+    },
+    {
+      "name": "tokio_device_test_tests_rt_basic"
+    },
+    {
+      "name": "tokio_device_test_tests_rt_threaded"
+    },
+    {
+      "name": "tokio_device_test_tests_sync_barrier"
+    },
+    {
+      "name": "tokio_device_test_tests_sync_broadcast"
+    },
+    {
+      "name": "tokio_device_test_tests_sync_errors"
+    },
+    {
+      "name": "tokio_device_test_tests_sync_mpsc"
+    },
+    {
+      "name": "tokio_device_test_tests_sync_mutex_owned"
+    },
+    {
+      "name": "tokio_device_test_tests_sync_rwlock"
+    },
+    {
+      "name": "tokio_device_test_tests_sync_watch"
+    },
+    {
+      "name": "tokio_device_test_tests_task_local"
+    },
+    {
+      "name": "tokio_device_test_tests_task_local_set"
+    },
+    {
+      "name": "tokio_device_test_tests_tcp_accept"
+    },
+    {
+      "name": "tokio_device_test_tests_tcp_echo"
+    },
+    {
+      "name": "tokio_device_test_tests_tcp_into_std"
+    },
+    {
+      "name": "tokio_device_test_tests_tcp_shutdown"
+    },
+    {
+      "name": "tokio_device_test_tests_time_rt"
+    },
+    {
+      "name": "tokio_device_test_tests_uds_split"
+    }
+  ]
+}
diff --git a/src/entry.rs b/src/entry.rs
index f82a329..ddc1958 100644
--- a/src/entry.rs
+++ b/src/entry.rs
@@ -1,7 +1,6 @@
 use proc_macro::TokenStream;
 use proc_macro2::Span;
-use quote::quote;
-use syn::spanned::Spanned;
+use quote::{quote, quote_spanned, ToTokens};
 
 #[derive(Clone, Copy, PartialEq)]
 enum RuntimeFlavor {
@@ -34,6 +33,7 @@
     flavor: Option<RuntimeFlavor>,
     worker_threads: Option<(usize, Span)>,
     start_paused: Option<(bool, Span)>,
+    is_test: bool,
 }
 
 impl Configuration {
@@ -47,6 +47,7 @@
             flavor: None,
             worker_threads: None,
             start_paused: None,
+            is_test,
         }
     }
 
@@ -92,16 +93,25 @@
         Ok(())
     }
 
+    fn macro_name(&self) -> &'static str {
+        if self.is_test {
+            "tokio::test"
+        } else {
+            "tokio::main"
+        }
+    }
+
     fn build(&self) -> Result<FinalConfig, syn::Error> {
         let flavor = self.flavor.unwrap_or(self.default_flavor);
         use RuntimeFlavor::*;
 
         let worker_threads = match (flavor, self.worker_threads) {
             (CurrentThread, Some((_, worker_threads_span))) => {
-                return Err(syn::Error::new(
-                    worker_threads_span,
-                    "The `worker_threads` option requires the `multi_thread` runtime flavor.",
-                ))
+                let msg = format!(
+                    "The `worker_threads` option requires the `multi_thread` runtime flavor. Use `#[{}(flavor = \"multi_thread\")]`",
+                    self.macro_name(),
+                );
+                return Err(syn::Error::new(worker_threads_span, msg));
             }
             (CurrentThread, None) => None,
             (Threaded, worker_threads) if self.rt_multi_thread_available => {
@@ -119,10 +129,11 @@
 
         let start_paused = match (flavor, self.start_paused) {
             (Threaded, Some((_, start_paused_span))) => {
-                return Err(syn::Error::new(
-                    start_paused_span,
-                    "The `start_paused` option requires the `current_thread` runtime flavor.",
-                ));
+                let msg = format!(
+                    "The `start_paused` option requires the `current_thread` runtime flavor. Use `#[{}(flavor = \"current_thread\")]`",
+                    self.macro_name(),
+                );
+                return Err(syn::Error::new(start_paused_span, msg));
             }
             (CurrentThread, Some((start_paused, _))) => Some(start_paused),
             (_, None) => None,
@@ -142,12 +153,12 @@
             Ok(value) => Ok(value),
             Err(e) => Err(syn::Error::new(
                 span,
-                format!("Failed to parse {} as integer: {}", field, e),
+                format!("Failed to parse value of `{}` as integer: {}", field, e),
             )),
         },
         _ => Err(syn::Error::new(
             span,
-            format!("Failed to parse {} as integer.", field),
+            format!("Failed to parse value of `{}` as integer.", field),
         )),
     }
 }
@@ -158,7 +169,7 @@
         syn::Lit::Verbatim(s) => Ok(s.to_string()),
         _ => Err(syn::Error::new(
             span,
-            format!("Failed to parse {} as string.", field),
+            format!("Failed to parse value of `{}` as string.", field),
         )),
     }
 }
@@ -168,7 +179,7 @@
         syn::Lit::Bool(b) => Ok(b.value),
         _ => Err(syn::Error::new(
             span,
-            format!("Failed to parse {} as bool.", field),
+            format!("Failed to parse value of `{}` as bool.", field),
         )),
     }
 }
@@ -179,24 +190,13 @@
     is_test: bool,
     rt_multi_thread: bool,
 ) -> Result<TokenStream, syn::Error> {
-    let sig = &mut input.sig;
-    let body = &input.block;
-    let attrs = &input.attrs;
-    let vis = input.vis;
-
-    if sig.asyncness.is_none() {
-        let msg = "the async keyword is missing from the function declaration";
-        return Err(syn::Error::new_spanned(sig.fn_token, msg));
+    if input.sig.asyncness.take().is_none() {
+        let msg = "the `async` keyword is missing from the function declaration";
+        return Err(syn::Error::new_spanned(input.sig.fn_token, msg));
     }
 
-    sig.asyncness = None;
-
-    let macro_name = if is_test {
-        "tokio::test"
-    } else {
-        "tokio::main"
-    };
     let mut config = Configuration::new(is_test, rt_multi_thread);
+    let macro_name = config.macro_name();
 
     for arg in args {
         match arg {
@@ -208,20 +208,32 @@
                 }
                 match ident.unwrap().to_string().to_lowercase().as_str() {
                     "worker_threads" => {
-                        config.set_worker_threads(namevalue.lit.clone(), namevalue.span())?;
+                        config.set_worker_threads(
+                            namevalue.lit.clone(),
+                            syn::spanned::Spanned::span(&namevalue.lit),
+                        )?;
                     }
                     "flavor" => {
-                        config.set_flavor(namevalue.lit.clone(), namevalue.span())?;
+                        config.set_flavor(
+                            namevalue.lit.clone(),
+                            syn::spanned::Spanned::span(&namevalue.lit),
+                        )?;
                     }
                     "start_paused" => {
-                        config.set_start_paused(namevalue.lit.clone(), namevalue.span())?;
+                        config.set_start_paused(
+                            namevalue.lit.clone(),
+                            syn::spanned::Spanned::span(&namevalue.lit),
+                        )?;
                     }
                     "core_threads" => {
                         let msg = "Attribute `core_threads` is renamed to `worker_threads`";
                         return Err(syn::Error::new_spanned(namevalue, msg));
                     }
                     name => {
-                        let msg = format!("Unknown attribute {} is specified; expected one of: `flavor`, `worker_threads`", name);
+                        let msg = format!(
+                            "Unknown attribute {} is specified; expected one of: `flavor`, `worker_threads`, `start_paused`",
+                            name,
+                        );
                         return Err(syn::Error::new_spanned(namevalue, msg));
                     }
                 }
@@ -266,11 +278,29 @@
 
     let config = config.build()?;
 
+    // If type mismatch occurs, the current rustc points to the last statement.
+    let (last_stmt_start_span, last_stmt_end_span) = {
+        let mut last_stmt = input
+            .block
+            .stmts
+            .last()
+            .map(ToTokens::into_token_stream)
+            .unwrap_or_default()
+            .into_iter();
+        // `Span` on stable Rust has a limitation that only points to the first
+        // token, not the whole tokens. We can work around this limitation by
+        // using the first/last span of the tokens like
+        // `syn::Error::new_spanned` does.
+        let start = last_stmt.next().map_or_else(Span::call_site, |t| t.span());
+        let end = last_stmt.last().map_or(start, |t| t.span());
+        (start, end)
+    };
+
     let mut rt = match config.flavor {
-        RuntimeFlavor::CurrentThread => quote! {
+        RuntimeFlavor::CurrentThread => quote_spanned! {last_stmt_start_span=>
             tokio::runtime::Builder::new_current_thread()
         },
-        RuntimeFlavor::Threaded => quote! {
+        RuntimeFlavor::Threaded => quote_spanned! {last_stmt_start_span=>
             tokio::runtime::Builder::new_multi_thread()
         },
     };
@@ -281,26 +311,31 @@
         rt = quote! { #rt.start_paused(#v) };
     }
 
-    let header = {
-        if is_test {
-            quote! {
-                #[::core::prelude::v1::test]
-            }
-        } else {
-            quote! {}
+    let header = if is_test {
+        quote! {
+            #[::core::prelude::v1::test]
         }
+    } else {
+        quote! {}
     };
 
-    let result = quote! {
-        #header
-        #(#attrs)*
-        #vis #sig {
+    let body = &input.block;
+    let brace_token = input.block.brace_token;
+    input.block = syn::parse2(quote_spanned! {last_stmt_end_span=>
+        {
             #rt
                 .enable_all()
                 .build()
                 .unwrap()
                 .block_on(async #body)
         }
+    })
+    .unwrap();
+    input.block.brace_token = brace_token;
+
+    let result = quote! {
+        #header
+        #input
     };
 
     Ok(result.into())
@@ -334,12 +369,5 @@
         }
     }
 
-    if !input.sig.inputs.is_empty() {
-        let msg = "the test function cannot accept arguments";
-        return syn::Error::new_spanned(&input.sig.inputs, msg)
-            .to_compile_error()
-            .into();
-    }
-
     parse_knobs(input, args, true, rt_multi_thread).unwrap_or_else(|e| e.to_compile_error().into())
 }
diff --git a/src/lib.rs b/src/lib.rs
index 5e41a5e..18de772 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,3 @@
-#![doc(html_root_url = "https://docs.rs/tokio-macros/1.1.0")]
 #![allow(clippy::needless_doctest_main)]
 #![warn(
     missing_debug_implementations,
@@ -168,6 +167,8 @@
 /// }
 /// ```
 ///
+/// Note that `start_paused` requires the `test-util` feature to be enabled.
+///
 /// ### NOTE:
 ///
 /// If you rename the Tokio crate in your dependencies this macro will not work.
@@ -258,6 +259,8 @@
 /// }
 /// ```
 ///
+/// Note that `start_paused` requires the `test-util` feature to be enabled.
+///
 /// ### NOTE:
 ///
 /// If you rename the Tokio crate in your dependencies this macro will not work.