Matthias Krüger c09c16c0df
Rollup merge of #91298 - FabianWolff:issue-91028-source-avail, r=cjgillot
Improve error message for `E0659` if the source is not available

Fixes #91028. The fix is similar to those in #89233 and #87088. With this change, instead of the dangling
```
note: `Option` could also refer to the enum defined here
```
I get
```
note: `Option` could also refer to an enum from prelude
```
If the standard library source code _is_ available, the output does not change.
2021-12-01 10:50:21 +01:00
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