Rollup merge of #73092 - GuillaumeGomez:cleanup-e0646, r=Dylan-DPC

Clean up E0646

r? @Dylan-DPC
This commit is contained in:
Ralf Jung
2020-06-08 09:55:35 +02:00
committed by GitHub
@@ -1,4 +1,5 @@
It is not possible to define `main` with a where clause.
Erroneous code example:
```compile_fail,E0646