getting "Unexpected token {" after updating to 0.57.3

[etodanik]

• Review the documentation: https://facebook.github.io/react-native
• Search for existing issues: https:/facebook/react-native/issues
• Use the latest React Native release: https:/facebook/react-native/releases

Environment

React Native Environment Info:
System:
OS: macOS 10.14.1
CPU: x64 Intel(R) Core(TM) i7-4771 CPU @ 3.50GHz
Memory: 50.90 MB / 8.00 GB
Shell: 3.2.57 - /bin/bash
Binaries:
Node: 8.12.0 - ~/.nvm/versions/node/v8.12.0/bin/node
npm: 6.4.1 - ~/.nvm/versions/node/v8.12.0/bin/npm
Watchman: 4.9.0 - /usr/local/bin/watchman
SDKs:
iOS SDK:
Platforms: iOS 12.0, macOS 10.14, tvOS 12.0, watchOS 5.0
IDEs:
Android Studio: 3.1 AI-173.4907809
Xcode: 10.0/10A255 - /usr/bin/xcodebuild
npmPackages:
react: ^16.6.0-alpha.8af6728 => 16.6.0-alpha.8af6728
react-native: ^0.57.3 => 0.57.3
npmGlobalPackages:
create-react-native-app: 1.0.0
react-native-cli: 2.0.1
react-native-git-upgrade: 0.2.7

Description

After updating my project to RN v0.57.3 I'm getting this error. Metro bundler does not indicate that anything is wrong. The exact same codebase worked fine just before the update.

Reproducible Demo

Update app to RN v0.57.3? I'm not 100% sure.

There is at least one more person who had this issue:
#21558

@pdaivik

[etodanik]

Updating metro bundler and react-native-cli seemed to have cleared up the error a little bit:

Unhandled JS Exception: Unexpected token '{'.
import call expects exactly one argument.

[etodanik]

Upon further investigation, this was the issue I encountered:
#20150

One of the workarounds worked out.

[RLesser]

Hey, I'm getting the same error as you were, which of the workarounds did you do that worked? Not sure what is causing this and it's not easy to debug.

[bmwertman]

I'm seeing this same error on the latest React-native

React Native Environment Info:
System:
OS: macOS 10.14
CPU: (4) x64 Intel(R) Core(TM) i7-3667U CPU @ 2.00GHz
Memory: 38.86 MB / 8.00 GB
Shell: 3.2.57 - /bin/bash
Binaries:
Node: 8.11.2 - ~/.nvm/versions/node/v8.11.2/bin/node
Yarn: 1.6.0 - /usr/local/bin/yarn
npm: 6.7.0 - ~/.npm-packages/bin/npm
Watchman: 4.9.0 - /usr/local/bin/watchman
SDKs:
iOS SDK:
Platforms: iOS 12.1, macOS 10.14, tvOS 12.1, watchOS 5.1
Android SDK:
API Levels: 25
IDEs:
Android Studio: 3.1 AI-173.4720617
Xcode: 10.1/10B61 - /usr/bin/xcodebuild
npmPackages:
react: 16.6.3 => 16.6.3
react-native: 0.58.6 => 0.58.6
npmGlobalPackages:
react-native-cli: 2.0.1
react-native-git-upgrade: 0.2.7