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language-server: Don't break on bad arguments #1523

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1 change: 1 addition & 0 deletions CHANGELOG.md
Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,7 @@
- <First `apollo-graphql` related entry goes here>
- `apollo-language-server`
- Replace instanceof checks with their respective predicates [#1518](https://github.com/apollographql/apollo-tooling/pull/1518)
- Language server should not break on hover provider over untyped arguments (https://github.com/apollographql/apollo-tooling/pull/1523)
- `apollo-tools`
- <First `apollo-tools` related entry goes here>
- `vscode-apollo`
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3 changes: 2 additions & 1 deletion packages/apollo-language-server/src/languageProvider.ts
Original file line number Diff line number Diff line change
Expand Up @@ -376,7 +376,8 @@ export class GraphQLLanguageProvider {
}

case Kind.ARGUMENT: {
const argumentNode = typeInfo.getArgument()!;
const argumentNode = typeInfo.getArgument();
if (!argumentNode) break;
const content = [
[
`\`\`\`graphql`,
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