Problems with type inference in gsp file

Variable is specifically defined as enum `ProductEnum`, but IDEA considers it is `java.lang.CharSequence`
```




${product.title}

${wrongDep.join(", ")}





```
Both nightly and EAP are affected:
```
IntelliJ IDEA 2018.2 EAP (Ultimate Edition)
Build #IU-182.3588, built on July 4, 2018
IntelliJ IDEA EAP User
Expiration date: August 3, 2018
JRE: 1.8.0_152-release-1136-b23 x86_64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
macOS 10.13.5
```
```
IntelliJ IDEA 2018.2 EAP (Ultimate Edition)
Build #IU-182.3569.1, built on July 3, 2018
IntelliJ IDEA EAP User
Expiration date: August 2, 2018
JRE: 1.8.0_152-release-1136-b23 x86_64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
macOS 10.13.5
```

---

*Imported from [IDEA-195041](https://youtrack.jetbrains.com/issue/IDEA-195041) · Type: Bug · Votes: 0*
*Comments, attachments, dates and reporter are not part of the export — follow the link above for the full history.*

No repository file or test is named. Start by reproducing the provided GSP snippet in the listed IntelliJ IDEA builds and inspect how the type of `product` is inferred after the `g:set` cast. Done means the IDE recognizes `product` as `ProductEnum` and provides the expected type-aware behavior in the template.

Written by the indexing model from the issue text.