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Flow 0.34.0 reports lots of errors

See original GitHub issue

Description

Using Flow 0.34.0 I get a lot of errors in core libraries

Reproduction

$ node_modules/.bin/flow version
Flow, a static type checker for JavaScript, version 0.34.0

$ node_modules/.bin/flow
node_modules/react-native/Libraries/JSInspector/NetworkAgent.js:277
277:     XMLHttpRequest.setInterceptor(this._interceptor);
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call of method `setInterceptor`
277:     XMLHttpRequest.setInterceptor(this._interceptor);
                                       ^^^^^^^^^^^^^^^^^ Interceptor. Covariant property `dataReceived` incompatible with invariant use in
136:   static setInterceptor(interceptor: ?XHRInterceptor) {
                                           ^^^^^^^^^^^^^^ object type. See: node_modules/react-native/Libraries/Network/XMLHttpRequest.js:136

node_modules/react-native/Libraries/JSInspector/NetworkAgent.js:277
277:     XMLHttpRequest.setInterceptor(this._interceptor);
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call of method `setInterceptor`
277:     XMLHttpRequest.setInterceptor(this._interceptor);
                                       ^^^^^^^^^^^^^^^^^ Interceptor. Covariant property `loadingFailed` incompatible with invariant use in
136:   static setInterceptor(interceptor: ?XHRInterceptor) {
                                           ^^^^^^^^^^^^^^ object type. See: node_modules/react-native/Libraries/Network/XMLHttpRequest.js:136

node_modules/react-native/Libraries/JSInspector/NetworkAgent.js:277
277:     XMLHttpRequest.setInterceptor(this._interceptor);
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call of method `setInterceptor`
277:     XMLHttpRequest.setInterceptor(this._interceptor);
                                       ^^^^^^^^^^^^^^^^^ Interceptor. Covariant property `loadingFinished` incompatible with invariant use in
136:   static setInterceptor(interceptor: ?XHRInterceptor) {
                                           ^^^^^^^^^^^^^^ object type. See: node_modules/react-native/Libraries/Network/XMLHttpRequest.js:136

node_modules/react-native/Libraries/JSInspector/NetworkAgent.js:277
277:     XMLHttpRequest.setInterceptor(this._interceptor);
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call of method `setInterceptor`
277:     XMLHttpRequest.setInterceptor(this._interceptor);
                                       ^^^^^^^^^^^^^^^^^ Interceptor. Covariant property `requestSent` incompatible with invariant use in
136:   static setInterceptor(interceptor: ?XHRInterceptor) {
                                           ^^^^^^^^^^^^^^ object type. See: node_modules/react-native/Libraries/Network/XMLHttpRequest.js:136

node_modules/react-native/Libraries/JSInspector/NetworkAgent.js:277
277:     XMLHttpRequest.setInterceptor(this._interceptor);
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call of method `setInterceptor`
277:     XMLHttpRequest.setInterceptor(this._interceptor);
                                       ^^^^^^^^^^^^^^^^^ Interceptor. Covariant property `responseReceived` incompatible with invariant use in
136:   static setInterceptor(interceptor: ?XHRInterceptor) {
                                           ^^^^^^^^^^^^^^ object type. See: node_modules/react-native/Libraries/Network/XMLHttpRequest.js:136

node_modules/react-native/Libraries/ReactNative/YellowBox.js:60
 60:   console.error = function() {
       ^^^^^^^ object type. Covariant property `error` incompatible with contravariant use in
 60:   console.error = function() {
       ^^^^^^^^^^^^^ assignment of property `error`

node_modules/react-native/Libraries/ReactNative/YellowBox.js:68
 68:   console.warn = function() {
       ^^^^^^^ object type. Covariant property `warn` incompatible with contravariant use in
 68:   console.warn = function() {
       ^^^^^^^^^^^^ assignment of property `warn`

node_modules/react-native/Libraries/Renderer/src/renderers/native/ReactNativeAttributePayload.js:34
 34:   { diff: AttributeDiffer, process: AttributePreprocessor } |
               ^^^^^^^^^^^^^^^ function type. Callable signature not found in
 40:     CustomAttributeConfiguration | AttributeConfiguration /*| boolean*/
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ object type

node_modules/react-native/Libraries/Renderer/src/renderers/native/ReactNativeAttributePayload.js:34
 34:   { diff: AttributeDiffer, process: AttributePreprocessor } |
               ^^^^^^^^^^^^^^^ function type. Callable signature not found in
 40:     CustomAttributeConfiguration | AttributeConfiguration /*| boolean*/
                                        ^^^^^^^^^^^^^^^^^^^^^^ object type

node_modules/react-native/Libraries/Renderer/src/renderers/native/ReactNativeAttributePayload.js:34
 34:   { diff: AttributeDiffer, process: AttributePreprocessor } |
                                         ^^^^^^^^^^^^^^^^^^^^^ function type. Callable signature not found in
 40:     CustomAttributeConfiguration | AttributeConfiguration /*| boolean*/
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ object type

node_modules/react-native/Libraries/Renderer/src/renderers/native/ReactNativeAttributePayload.js:34
 34:   { diff: AttributeDiffer, process: AttributePreprocessor } |
                                         ^^^^^^^^^^^^^^^^^^^^^ function type. Callable signature not found in
 40:     CustomAttributeConfiguration | AttributeConfiguration /*| boolean*/
                                        ^^^^^^^^^^^^^^^^^^^^^^ object type

node_modules/react-native/Libraries/Renderer/src/renderers/native/ReactNativeAttributePayload.js:35
 35:   { diff: AttributeDiffer } |
               ^^^^^^^^^^^^^^^ function type. Callable signature not found in
 40:     CustomAttributeConfiguration | AttributeConfiguration /*| boolean*/
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ object type

node_modules/react-native/Libraries/Renderer/src/renderers/native/ReactNativeAttributePayload.js:35
 35:   { diff: AttributeDiffer } |
               ^^^^^^^^^^^^^^^ function type. Callable signature not found in
 40:     CustomAttributeConfiguration | AttributeConfiguration /*| boolean*/
                                        ^^^^^^^^^^^^^^^^^^^^^^ object type

node_modules/react-native/Libraries/Renderer/src/renderers/native/ReactNativeAttributePayload.js:36
 36:   { process: AttributePreprocessor };
                  ^^^^^^^^^^^^^^^^^^^^^ function type. Callable signature not found in
 40:     CustomAttributeConfiguration | AttributeConfiguration /*| boolean*/
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ object type

node_modules/react-native/Libraries/Renderer/src/renderers/native/ReactNativeAttributePayload.js:36
 36:   { process: AttributePreprocessor };
                  ^^^^^^^^^^^^^^^^^^^^^ function type. Callable signature not found in
 40:     CustomAttributeConfiguration | AttributeConfiguration /*| boolean*/
                                        ^^^^^^^^^^^^^^^^^^^^^^ object type

node_modules/react-native/Libraries/Renderer/src/renderers/shared/fiber/ReactChildFiber.js:76
 76:         previousSibling.sibling = child;
             ^^^^^^^^^^^^^^^^^^^^^^^ assignment of property `sibling`. Property cannot be assigned on any member of intersection type
 76:         previousSibling.sibling = child;
             ^^^^^^^^^^^^^^^ intersection
  Member 1:
   60: export type Fiber = Instance & {
                           ^^^^^^^^ Instance. See: node_modules/react-native/Libraries/Renderer/src/renderers/shared/fiber/ReactFiber.js:60
  Error:
   76:         previousSibling.sibling = child;
                               ^^^^^^^ property `sibling`. Property not found in
   60: export type Fiber = Instance & {
                           ^^^^^^^^ object type. See: node_modules/react-native/Libraries/Renderer/src/renderers/shared/fiber/ReactFiber.js:60
  Member 2:
   60: export type Fiber = Instance & {
                                      ^ object type. See: node_modules/react-native/Libraries/Renderer/src/renderers/shared/fiber/ReactFiber.js:60
  Error:
  248: function createFiberFromElementType(type : mixed, key : null | string) {
                                                  ^^^^^ mixed. This type is incompatible with. See: node_modules/react-native/Libraries/Renderer/src/renderers/shared/fiber/ReactFiber.js:248
   44:   key: null | string,
              ^^^^^^^^^^^^^ union: null | string. See: node_modules/react-native/Libraries/Renderer/src/renderers/shared/fiber/ReactFiber.js:44
    Member 1:
     44:   key: null | string,
                ^^^^ null. See: node_modules/react-native/Libraries/Renderer/src/renderers/shared/fiber/ReactFiber.js:44
    Error:
    248: function createFiberFromElementType(type : mixed, key : null | string) {
                                                    ^^^^^ mixed. This type is incompatible with. See: node_modules/react-native/Libraries/Renderer/src/renderers/shared/fiber/ReactFiber.js:248
     44:   key: null | string,
                ^^^^ null. See: node_modules/react-native/Libraries/Renderer/src/renderers/shared/fiber/ReactFiber.js:44
    Member 2:
     44:   key: null | string,
                       ^^^^^^ string. See: node_modules/react-native/Libraries/Renderer/src/renderers/shared/fiber/ReactFiber.js:44
    Error:
    248: function createFiberFromElementType(type : mixed, key : null | string) {
                                                    ^^^^^ mixed. This type is incompatible with. See: node_modules/react-native/Libraries/Renderer/src/renderers/shared/fiber/ReactFiber.js:248
     44:   key: null | string,
                       ^^^^^^ string. See: node_modules/react-native/Libraries/Renderer/src/renderers/shared/fiber/ReactFiber.js:44

node_modules/react-native/Libraries/Renderer/src/renderers/shared/fiber/ReactFiber.js:248
248: function createFiberFromElementType(type : mixed, key : null | string) {
                                                ^^^^^ mixed. This type is incompatible with
 41:   tag: TypeOfWork,
            ^^^^^^^^^^ number enum

node_modules/react-native/Libraries/Renderer/src/renderers/shared/fiber/ReactFiber.js:248
248: function createFiberFromElementType(type : mixed, key : null | string) {
                                                ^^^^^ mixed. This type is incompatible with
 44:   key: null | string,
            ^^^^^^^^^^^^^ union: null | string
  Member 1:
   44:   key: null | string,
              ^^^^ null
  Error:
  248: function createFiberFromElementType(type : mixed, key : null | string) {
                                                  ^^^^^ mixed. This type is incompatible with
   44:   key: null | string,
              ^^^^ null
  Member 2:
   44:   key: null | string,
                     ^^^^^^ string
  Error:
  248: function createFiberFromElementType(type : mixed, key : null | string) {
                                                  ^^^^^ mixed. This type is incompatible with
   44:   key: null | string,
                     ^^^^^^ string

node_modules/react-native/Libraries/Renderer/src/renderers/shared/fiber/ReactFiber.js:248
248: function createFiberFromElementType(type : mixed, key : null | string) {
                                                ^^^^^ mixed. This type is incompatible with
 60: export type Fiber = Instance & {
                         ^^^^^^^^ object type

node_modules/react-native/Libraries/Renderer/src/renderers/shared/fiber/ReactFiber.js:248
248: function createFiberFromElementType(type : mixed, key : null | string) {
                                                ^^^^^ mixed. This type is incompatible with
 60: export type Fiber = Instance & {
                                    ^ object type

node_modules/react-native/Libraries/Renderer/src/renderers/shared/fiber/ReactFiber.js:248
248: function createFiberFromElementType(type : mixed, key : null | string) {
                                                ^^^^^ mixed. This type is incompatible with
 74:   ref: null | (handle : ?Object) => void,
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ union: null | function type
  Member 1:
   74:   ref: null | (handle : ?Object) => void,
              ^^^^ null
  Error:
  248: function createFiberFromElementType(type : mixed, key : null | string) {
                                                  ^^^^^ mixed. This type is incompatible with
   74:   ref: null | (handle : ?Object) => void,
              ^^^^ null
  Member 2:
   74:   ref: null | (handle : ?Object) => void,
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^ function type
  Error:
  248: function createFiberFromElementType(type : mixed, key : null | string) {
                                                  ^^^^^ mixed. This type is incompatible with
   74:   ref: null | (handle : ?Object) => void,
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^ function type

node_modules/react-native/Libraries/Renderer/src/renderers/shared/fiber/ReactFiber.js:248
248: function createFiberFromElementType(type : mixed, key : null | string) {
                                                ^^^^^ mixed. This type is incompatible with
100:   pendingWorkPriority: PriorityLevel,
                            ^^^^^^^^^^^^^ number enum

node_modules/react-native/Libraries/Renderer/src/renderers/shared/fiber/ReactFiber.js:248
248: function createFiberFromElementType(type : mixed, key : null | string) {
                                                ^^^^^ mixed. This type is incompatible with
105:   progressedPriority: PriorityLevel,
                           ^^^^^^^^^^^^^ number enum

node_modules/react-native/Libraries/Renderer/src/renderers/shared/fiber/ReactFiber.js:248
248: function createFiberFromElementType(type : mixed, key : null | string) {
                                                ^^^^^ mixed. This type is incompatible with
 22: export type UpdateQueue = UpdateQueueNode & {
                               ^^^^^^^^^^^^^^^ object type. See: node_modules/react-native/Libraries/Renderer/src/renderers/shared/fiber/ReactFiberUpdateQueue.js:22

node_modules/react-native/Libraries/Renderer/src/renderers/shared/fiber/ReactFiber.js:248
248: function createFiberFromElementType(type : mixed, key : null | string) {
                                                ^^^^^ mixed. This type is incompatible with
 22: export type UpdateQueue = UpdateQueueNode & {
                                                 ^ object type. See: node_modules/react-native/Libraries/Renderer/src/renderers/shared/fiber/ReactFiberUpdateQueue.js:22

node_modules/react-native/Libraries/Text/TextStylePropTypes.js:21
 21:   fontFamily: ReactPropTypes.string,
                   ^^^^^^^^^^^^^^^^^^^^^ property `isRequired` of object type. Property not found in
 18:   shape: {[key: string]: ReactPropsCheckType}
                              ^^^^^^^^^^^^^^^^^^^ function type. See: node_modules/react-native/Libraries/StyleSheet/StyleSheetPropType.js:18

node_modules/react-native/Libraries/Text/TextStylePropTypes.js:22
 22:   fontSize: ReactPropTypes.number,
                 ^^^^^^^^^^^^^^^^^^^^^ property `isRequired` of object type. Property not found in
 18:   shape: {[key: string]: ReactPropsCheckType}
                              ^^^^^^^^^^^^^^^^^^^ function type. See: node_modules/react-native/Libraries/StyleSheet/StyleSheetPropType.js:18

node_modules/react-native/Libraries/Text/TextStylePropTypes.js:23
 23:   fontStyle: ReactPropTypes.oneOf(['normal', 'italic']),
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ property `isRequired` of object type. Property not found in
 18:   shape: {[key: string]: ReactPropsCheckType}
                              ^^^^^^^^^^^^^^^^^^^ function type. See: node_modules/react-native/Libraries/StyleSheet/StyleSheetPropType.js:18

node_modules/react-native/Libraries/Text/TextStylePropTypes.js:29
 29:   fontWeight: ReactPropTypes.oneOf(
                   ^ property `isRequired` of object type. Property not found in
 18:   shape: {[key: string]: ReactPropsCheckType}
                              ^^^^^^^^^^^^^^^^^^^ function type. See: node_modules/react-native/Libraries/StyleSheet/StyleSheetPropType.js:18

node_modules/react-native/Libraries/Text/TextStylePropTypes.js:36
 36:   fontVariant: ReactPropTypes.arrayOf(
                    ^ property `isRequired` of object type. Property not found in
 18:   shape: {[key: string]: ReactPropsCheckType}
                              ^^^^^^^^^^^^^^^^^^^ function type. See: node_modules/react-native/Libraries/StyleSheet/StyleSheetPropType.js:18

node_modules/react-native/Libraries/Text/TextStylePropTypes.js:45
 45:   textShadowOffset: ReactPropTypes.shape(
                         ^ property `isRequired` of object type. Property not found in
 18:   shape: {[key: string]: ReactPropsCheckType}
                              ^^^^^^^^^^^^^^^^^^^ function type. See: node_modules/react-native/Libraries/StyleSheet/StyleSheetPropType.js:18

node_modules/react-native/Libraries/Text/TextStylePropTypes.js:48
 48:   textShadowRadius: ReactPropTypes.number,
                         ^^^^^^^^^^^^^^^^^^^^^ property `isRequired` of object type. Property not found in
 18:   shape: {[key: string]: ReactPropsCheckType}
                              ^^^^^^^^^^^^^^^^^^^ function type. See: node_modules/react-native/Libraries/StyleSheet/StyleSheetPropType.js:18

node_modules/react-native/Libraries/Text/TextStylePropTypes.js:53
 53:   letterSpacing: ReactPropTypes.number,
                      ^^^^^^^^^^^^^^^^^^^^^ property `isRequired` of object type. Property not found in
 18:   shape: {[key: string]: ReactPropsCheckType}
                              ^^^^^^^^^^^^^^^^^^^ function type. See: node_modules/react-native/Libraries/StyleSheet/StyleSheetPropType.js:18

node_modules/react-native/Libraries/Text/TextStylePropTypes.js:54
 54:   lineHeight: ReactPropTypes.number,
                   ^^^^^^^^^^^^^^^^^^^^^ property `isRequired` of object type. Property not found in
 18:   shape: {[key: string]: ReactPropsCheckType}
                              ^^^^^^^^^^^^^^^^^^^ function type. See: node_modules/react-native/Libraries/StyleSheet/StyleSheetPropType.js:18

node_modules/react-native/Libraries/Text/TextStylePropTypes.js:59
 59:   textAlign: ReactPropTypes.oneOf(
                  ^ property `isRequired` of object type. Property not found in
 18:   shape: {[key: string]: ReactPropsCheckType}
                              ^^^^^^^^^^^^^^^^^^^ function type. See: node_modules/react-native/Libraries/StyleSheet/StyleSheetPropType.js:18

node_modules/react-native/Libraries/Text/TextStylePropTypes.js:65
 65:   textAlignVertical: ReactPropTypes.oneOf(
                          ^ property `isRequired` of object type. Property not found in
 18:   shape: {[key: string]: ReactPropsCheckType}
                              ^^^^^^^^^^^^^^^^^^^ function type. See: node_modules/react-native/Libraries/StyleSheet/StyleSheetPropType.js:18

node_modules/react-native/Libraries/Text/TextStylePropTypes.js:68
 68:   textDecorationLine: ReactPropTypes.oneOf(
                           ^ property `isRequired` of object type. Property not found in
 18:   shape: {[key: string]: ReactPropsCheckType}
                              ^^^^^^^^^^^^^^^^^^^ function type. See: node_modules/react-native/Libraries/StyleSheet/StyleSheetPropType.js:18

node_modules/react-native/Libraries/Text/TextStylePropTypes.js:74
 74:   textDecorationStyle: ReactPropTypes.oneOf(
                            ^ property `isRequired` of object type. Property not found in
 18:   shape: {[key: string]: ReactPropsCheckType}
                              ^^^^^^^^^^^^^^^^^^^ function type. See: node_modules/react-native/Libraries/StyleSheet/StyleSheetPropType.js:18

node_modules/react-native/Libraries/Text/TextStylePropTypes.js:84
 84:   writingDirection: ReactPropTypes.oneOf(
                         ^ property `isRequired` of object type. Property not found in
 18:   shape: {[key: string]: ReactPropsCheckType}
                              ^^^^^^^^^^^^^^^^^^^ function type. See: node_modules/react-native/Libraries/StyleSheet/StyleSheetPropType.js:18


Found 39 errors

Solution

  • Fix type errors
  • Add flow suppress comments

Additional Information

  • React Native version: 0.38.0
  • Platform: both
  • Operating System: macOS

Issue Analytics

  • State:closed
  • Created 7 years ago
  • Comments:17 (8 by maintainers)

github_iconTop GitHub Comments

5reactions
0xAsimetriqcommented, Dec 27, 2016

Getting a lot of errors with flow ^0.37.4, had to install flow-bin to start with and am getting various errors (see below) that occur prior and post suggested regex fixes:

RN 0.39.2

node_modules/react-native/Libraries/Animated/src/AnimatedImplementation.js:1081
1081:     return this._interpolation(parentValue);
                 ^^^^ AnimatedInterpolation. This type is incompatible with
235:       const val = +interpolations[i++](input);
                        ^^^^^^^^^^^^^^ array type. See: node_modules/react-native/Libraries/Animated/src/Interpolation.js:235

node_modules/react-native/Libraries/Network/NetInfo.js:243
243:       /* $FlowFixMe */
           ^^^^^^^^^^^^^^^^ Error suppressing comment. Unused suppression

node_modules/react-native/Libraries/Network/NetInfo.js:247
247:         listener
             ^^^^^^^^ undefined. This type is incompatible with the expected param type of
197:     handler: Function
                  ^^^^^^^^ function type

node_modules/react-native/Libraries/Performance/Systrace.js:216
216:   require.Systrace = Systrace;
               ^^^^^^^^ property `Systrace`. Property not found in
216:   require.Systrace = Systrace;
       ^^^^^^^ object type

node_modules/react-native/local-cli/bundle/output/unbundle/as-indexed-file.js:74
 74: //$FlowIssue #14640206
     ^^^^^^^^^^^^^^^^^^^^^^ Error suppressing comment. Unused suppression

node_modules/react-native/local-cli/bundle/output/unbundle/as-indexed-file.js:116
116:   //$FlowIssue #14640206
       ^^^^^^^^^^^^^^^^^^^^^^ Error suppressing comment. Unused suppression

node_modules/react-native/packager/react-packager/src/Bundler/BundleBase.js:17
 17:   runBeforeMainModule?: Array<mixed>,
                                   ^^^^^ mixed. This type is incompatible with the expected param type of
112:   _addRequireCall(moduleId: string) {
                                 ^^^^^^ string. See: node_modules/react-native/packager/react-packager/src/Bundler/Bundle.js:112

node_modules/react-native/packager/react-packager/src/node-haste/Cache/index.js:164
164:             fieldNames.forEach((field, index) =>
                 ^ call of method `forEach`
 34:   data: {[field: string]: Promise<mixed>},
                               ^^^^^^^^^^^^^^ Promise. This type is incompatible with
 35:   static all<Elem, T:Iterable<Elem>>(promises: T): Promise<$TupleMap<T, typeof $await>>;
                                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^ mixed. See lib: node_modules/react-native/flow/Promise.js:35

node_modules/react-native/packager/react-packager/src/node-haste/ModuleCache.js:119
119:       if (this._packageCache[packagePath]) {
                                  ^^^^^^^^^^^ undefined. This type is incompatible with
 30:   _packageCache: {[filePath: string]: Package};
                                  ^^^^^^ string
1reaction
ericvicenticommented, Mar 6, 2017

I think the only way to fix this is to upgrade to 0.42. Really sorry about the inconvenience- we are going to be careful with flow errors from here on

Read more comments on GitHub >

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