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[babel-plugin-flow-runtime] cannot read .name of null

See original GitHub issue

using default plugin config (flow-runtime), or as object with the defaults explicitly specified ('assert': true, 'decorate': true…)

Cannot read property 'name' of null
   at converters.FunctionTypeParam (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:539:29)
   at convert (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:38:12)
   at /project/node_modules/babel-plugin-flow-runtime/lib/convert.js:512:12
   at Array.map (native)
   at converters.FunctionTypeAnnotation (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:511:62)
   at convert (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:38:12)
   at converters.ObjectTypeProperty (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:498:15)
   at convert (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:38:12)
   at /project/node_modules/babel-plugin-flow-runtime/lib/convert.js:488:12
   at Array.map (native)
   at converters.ObjectTypeAnnotation (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:487:114)
   at convert (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:38:12)
   at converters.TypeAlias (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:304:14)
   at convert (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:38:12)
   at TypeAlias (/project/node_modules/babel-plugin-flow-runtime/lib/transformVisitors.js:69:47)
   at NodePath._call (/project/node_modules/babel-traverse/lib/path/context.js:76:18)
   at NodePath.call (/project/node_modules/babel-traverse/lib/path/context.js:48:17)
   at NodePath.visit (/project/node_modules/babel-traverse/lib/path/context.js:105:12)
   at TraversalContext.visitQueue (/project/node_modules/babel-traverse/lib/context.js:150:16)
   at TraversalContext.visitMultiple (/project/node_modules/babel-traverse/lib/context.js:103:17)
   at TraversalContext.visit (/project/node_modules/babel-traverse/lib/context.js:190:19)
   at Function.traverse.node (/project/node_modules/babel-traverse/lib/index.js:114:17)
   at convert (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:40:11)
   at /project/node_modules/babel-plugin-flow-runtime/lib/convert.js:512:12
   at Array.map (native)
   at converters.FunctionTypeAnnotation (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:511:62)
   at convert (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:38:12)
   at converters.ObjectTypeProperty (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:498:15)
   at convert (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:38:12)
   at /project/node_modules/babel-plugin-flow-runtime/lib/convert.js:488:12
   at Array.map (native)
   at converters.ObjectTypeAnnotation (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:487:114)
   at convert (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:38:12)
   at converters.TypeAlias (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:304:14)
   at convert (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:38:12)
   at TypeAlias (/project/node_modules/babel-plugin-flow-runtime/lib/transformVisitors.js:69:47)
   at NodePath._call (/project/node_modules/babel-traverse/lib/path/context.js:76:18)
   at NodePath.call (/project/node_modules/babel-traverse/lib/path/context.js:48:17)
   at NodePath.visit (/project/node_modules/babel-traverse/lib/path/context.js:105:12)
   at TraversalContext.visitQueue (/project/node_modules/babel-traverse/lib/context.js:150:16)
   at TraversalContext.visitMultiple (/project/node_modules/babel-traverse/lib/context.js:103:17)
   at TraversalContext.visit (/project/node_modules/babel-traverse/lib/context.js:190:19)
   at Function.traverse.node (/project/node_modules/babel-traverse/lib/index.js:114:17)
   at traverse (/project/node_modules/babel-traverse/lib/index.js:79:12)
   at NodePath.traverse (/project/node_modules/babel-traverse/lib/path/index.js:144:25)
   at convert (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:40:11)
   at converters.ObjectTypeProperty (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:498:15)
   at convert (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:38:12)
   at /project/node_modules/babel-plugin-flow-runtime/lib/convert.js:488:12
   at Array.map (native)
   at converters.ObjectTypeAnnotation (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:487:114)
   at convert (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:38:12)
   at converters.TypeAlias (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:304:14)
   at convert (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:38:12)
   at TypeAlias (/project/node_modules/babel-plugin-flow-runtime/lib/transformVisitors.js:69:47)
   at NodePath._call (/project/node_modules/babel-traverse/lib/path/context.js:76:18)
   at NodePath.call (/project/node_modules/babel-traverse/lib/path/context.js:48:17)
   at NodePath.visit (/project/node_modules/babel-traverse/lib/path/context.js:105:12)
   at TraversalContext.visitQueue (/project/node_modules/babel-traverse/lib/context.js:150:16)
   at TraversalContext.visitMultiple (/project/node_modules/babel-traverse/lib/context.js:103:17)
   at TraversalContext.visit (/project/node_modules/babel-traverse/lib/context.js:190:19)
   at Function.traverse.node (/project/node_modules/babel-traverse/lib/index.js:114:17)
   at traverse (/project/node_modules/babel-traverse/lib/index.js:79:12)
   at NodePath.traverse (/project/node_modules/babel-traverse/lib/path/index.js:144:25)
   at PluginPass.Program (/project/node_modules/babel-plugin-flow-runtime/lib/index.js:20:14)
   at newFn (/project/node_modules/babel-traverse/lib/visitors.js:276:21)
   at NodePath._call (/project/node_modules/babel-traverse/lib/path/context.js:76:18)
   at convert (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:40:11)
   at /project/node_modules/babel-plugin-flow-runtime/lib/convert.js:488:12
   at Array.map (native)
   at converters.ObjectTypeAnnotation (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:487:114)
   at convert (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:38:12)
   at converters.TypeAlias (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:304:14)
   at convert (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:38:12)
   at TypeAlias (/project/node_modules/babel-plugin-flow-runtime/lib/transformVisitors.js:69:47)
   at NodePath._call (/project/node_modules/babel-traverse/lib/path/context.js:76:18)
   at NodePath.call (/project/node_modules/babel-traverse/lib/path/context.js:48:17)
   at NodePath.visit (/project/node_modules/babel-traverse/lib/path/context.js:105:12)
   at TraversalContext.visitQueue (/project/node_modules/babel-traverse/lib/context.js:150:16)
   at TraversalContext.visitMultiple (/project/node_modules/babel-traverse/lib/context.js:103:17)
   at TraversalContext.visit (/project/node_modules/babel-traverse/lib/context.js:190:19)
   at Function.traverse.node (/project/node_modules/babel-traverse/lib/index.js:114:17)
   at traverse (/project/node_modules/babel-traverse/lib/index.js:79:12)
   at NodePath.traverse (/project/node_modules/babel-traverse/lib/path/index.js:144:25)
   at PluginPass.Program (/project/node_modules/babel-plugin-flow-runtime/lib/index.js:20:14)
   at newFn (/project/node_modules/babel-traverse/lib/visitors.js:276:21)
   at NodePath._call (/project/node_modules/babel-traverse/lib/path/context.js:76:18)
   at NodePath.call (/project/node_modules/babel-traverse/lib/path/context.js:48:17)
   at NodePath.visit (/project/node_modules/babel-traverse/lib/path/context.js:105:12)
   at convert (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:40:11)
   at converters.TypeAlias (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:304:14)
   at convert (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:38:12)
   at TypeAlias (/project/node_modules/babel-plugin-flow-runtime/lib/transformVisitors.js:69:47)
   at NodePath._call (/project/node_modules/babel-traverse/lib/path/context.js:76:18)
   at NodePath.call (/project/node_modules/babel-traverse/lib/path/context.js:48:17)
   at NodePath.visit (/project/node_modules/babel-traverse/lib/path/context.js:105:12)
   at TraversalContext.visitQueue (/project/node_modules/babel-traverse/lib/context.js:150:16)
   at TraversalContext.visitMultiple (/project/node_modules/babel-traverse/lib/context.js:103:17)
   at TraversalContext.visit (/project/node_modules/babel-traverse/lib/context.js:190:19)
   at Function.traverse.node (/project/node_modules/babel-traverse/lib/index.js:114:17)
   at traverse (/project/node_modules/babel-traverse/lib/index.js:79:12)
   at NodePath.traverse (/project/node_modules/babel-traverse/lib/path/index.js:144:25)
   at PluginPass.Program (/project/node_modules/babel-plugin-flow-runtime/lib/index.js:20:14)
   at newFn (/project/node_modules/babel-traverse/lib/visitors.js:276:21)
   at NodePath._call (/project/node_modules/babel-traverse/lib/path/context.js:76:18)
   at NodePath.call (/project/node_modules/babel-traverse/lib/path/context.js:48:17)
   at NodePath.visit (/project/node_modules/babel-traverse/lib/path/context.js:105:12)
   at TraversalContext.visitQueue (/project/node_modules/babel-traverse/lib/context.js:150:16)
   at TraversalContext.visitSingle (/project/node_modules/babel-traverse/lib/context.js:108:19)
   at TraversalContext.visit (/project/node_modules/babel-traverse/lib/context.js:192:19)
   at Function.traverse.node (/project/node_modules/babel-traverse/lib/index.js:114:17)
   at convert (/project/node_modules/babel-plugin-flow-runtime/lib/convert.js:40:11)
   at TypeAlias (/project/node_modules/babel-plugin-flow-runtime/lib/transformVisitors.js:69:47)
   at NodePath._call (/project/node_modules/babel-traverse/lib/path/context.js:76:18)
   at NodePath.call (/project/node_modules/babel-traverse/lib/path/context.js:48:17)
   at NodePath.visit (/project/node_modules/babel-traverse/lib/path/context.js:105:12)
   at TraversalContext.visitQueue (/project/node_modules/babel-traverse/lib/context.js:150:16)
   at TraversalContext.visitMultiple (/project/node_modules/babel-traverse/lib/context.js:103:17)
   at TraversalContext.visit (/project/node_modules/babel-traverse/lib/context.js:190:19)
   at Function.traverse.node (/project/node_modules/babel-traverse/lib/index.js:114:17)
   at traverse (/project/node_modules/babel-traverse/lib/index.js:79:12)
   at NodePath.traverse (/project/node_modules/babel-traverse/lib/path/index.js:144:25)
   at PluginPass.Program (/project/node_modules/babel-plugin-flow-runtime/lib/index.js:20:14)
   at newFn (/project/node_modules/babel-traverse/lib/visitors.js:276:21)
   at NodePath._call (/project/node_modules/babel-traverse/lib/path/context.js:76:18)
   at NodePath.call (/project/node_modules/babel-traverse/lib/path/context.js:48:17)
   at NodePath.visit (/project/node_modules/babel-traverse/lib/path/context.js:105:12)
   at TraversalContext.visitQueue (/project/node_modules/babel-traverse/lib/context.js:150:16)
   at TraversalContext.visitSingle (/project/node_modules/babel-traverse/lib/context.js:108:19)
   at TraversalContext.visit (/project/node_modules/babel-traverse/lib/context.js:192:19)
   at Function.traverse.node (/project/node_modules/babel-traverse/lib/index.js:114:17)
   at traverse (/project/node_modules/babel-traverse/lib/index.js:79:12)
   at File.transform (/project/node_modules/babel-core/lib/transformation/file/index.js:558:35)

https://github.com/codemix/flow-runtime/blob/master/packages/babel-plugin-flow-runtime/src/firstPassVisitors.js

Issue Analytics

  • State:closed
  • Created 7 years ago
  • Comments:8 (1 by maintainers)

github_iconTop GitHub Comments

1reaction
phpnodecommented, Jan 9, 2017

fixed in v0.0.4

0reactions
matthewbptcommented, Jan 9, 2017

I get this error too, and I narrowed it down to anywhere where my code does a default export of an anonymous function or class, or directly exports an arrow function. I went through all my code making sure everything has a proper name and now it no longer throws that error during compilation. It’s a common pattern for small Stateless React Components to just export an anonymous arrow function directly, so I think this bug should be fixed.

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