From bbad31df2f0661976814832786a6067e4bc255f1 Mon Sep 17 00:00:00 2001
From: Guillaume Gomez <guillaume1.gomez@gmail.com>
Date: Thu, 13 Aug 2020 13:07:27 +0200
Subject: [PATCH 1/3] Clean up E0752 explanation

---
 src/librustc_error_codes/error_codes/E0752.md | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/src/librustc_error_codes/error_codes/E0752.md b/src/librustc_error_codes/error_codes/E0752.md
index 86945f83b5524..77512fddcf63a 100644
--- a/src/librustc_error_codes/error_codes/E0752.md
+++ b/src/librustc_error_codes/error_codes/E0752.md
@@ -1,11 +1,19 @@
-`fn main()` or the specified start function is not allowed to be
-async. You might be seeing this error because your async runtime
-library is not set up correctly.
+The entry point of the program was marked as `async`.
 
 Erroneous code example:
 
 ```compile_fail,E0752
-async fn main() -> Result<i32, ()> {
+async fn main() -> Result<i32, ()> { // error!
+    Ok(1)
+}
+```
+
+`fn main()` or the specified start function is not allowed to be `async`. You
+might be seeing this error because your async runtime library is not set up
+correctly. To fix it, don't declare the entry point as `async`:
+
+```
+fn main() -> Result<i32, ()> { // ok!
     Ok(1)
 }
 ```

From 406719bf24dc33e333e70804faf7697e795bc422 Mon Sep 17 00:00:00 2001
From: Guillaume Gomez <guillaume1.gomez@gmail.com>
Date: Thu, 13 Aug 2020 20:13:44 +0200
Subject: [PATCH 2/3] Improve wording

---
 src/librustc_error_codes/error_codes/E0752.md | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/librustc_error_codes/error_codes/E0752.md b/src/librustc_error_codes/error_codes/E0752.md
index 77512fddcf63a..d79ad06bee095 100644
--- a/src/librustc_error_codes/error_codes/E0752.md
+++ b/src/librustc_error_codes/error_codes/E0752.md
@@ -8,9 +8,9 @@ async fn main() -> Result<i32, ()> { // error!
 }
 ```
 
-`fn main()` or the specified start function is not allowed to be `async`. You
-might be seeing this error because your async runtime library is not set up
-correctly. To fix it, don't declare the entry point as `async`:
+`fn main()` or the specified start function is not allowed to be `async`. Not
+having a correct async runtime library setup may cause this error. To fix it,
+declare the entry point without `async`:
 
 ```
 fn main() -> Result<i32, ()> { // ok!

From 0ce97fc5112e3162b8396afe23848ac0b594a7ea Mon Sep 17 00:00:00 2001
From: Guillaume Gomez <guillaume1.gomez@gmail.com>
Date: Thu, 13 Aug 2020 21:07:56 +0200
Subject: [PATCH 3/3] Fix code examples

---
 src/librustc_error_codes/error_codes/E0752.md | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/librustc_error_codes/error_codes/E0752.md b/src/librustc_error_codes/error_codes/E0752.md
index d79ad06bee095..9736da80c2b7b 100644
--- a/src/librustc_error_codes/error_codes/E0752.md
+++ b/src/librustc_error_codes/error_codes/E0752.md
@@ -3,8 +3,8 @@ The entry point of the program was marked as `async`.
 Erroneous code example:
 
 ```compile_fail,E0752
-async fn main() -> Result<i32, ()> { // error!
-    Ok(1)
+async fn main() -> Result<(), ()> { // error!
+    Ok(())
 }
 ```
 
@@ -13,7 +13,7 @@ having a correct async runtime library setup may cause this error. To fix it,
 declare the entry point without `async`:
 
 ```
-fn main() -> Result<i32, ()> { // ok!
-    Ok(1)
+fn main() -> Result<(), ()> { // ok!
+    Ok(())
 }
 ```