yarn run v0.19.1
$ flow 
Launching Flow server for /home/ubuntu/debugger.html
Spawned flow server (pid=19940)
Logs will go to /tmp/flow/zShomezSubuntuzSdebugger.html.log
src/components/Editor/SearchBar.js:98
 98:       this.searchInput().focus();
           ^^^^^^^^^^^^^^^^^^^^^^^^^^ call of method `focus`. Method cannot be called on possibly null value
 98:       this.searchInput().focus();
           ^^^^^^^^^^^^^^^^^^ null

src/components/Editor/SearchBar.js:202
202:     this.searchInput().value = value;
                            ^^^^^ property `value`. Property cannot be assigned on possibly null value
202:     this.searchInput().value = value;
         ^^^^^^^^^^^^^^^^^^ null

src/components/Editor/SearchBar.js:202
202:     this.searchInput().value = value;
                            ^^^^^ property `value`. Property not found in
202:     this.searchInput().value = value;
         ^^^^^^^^^^^^^^^^^^ HTMLElement

src/components/Editor/SearchBar.js:208
208:       node.setSelectionRange(0, node.value.length);
                ^^^^^^^^^^^^^^^^^ property `setSelectionRange`. Property not found in
208:       node.setSelectionRange(0, node.value.length);
           ^^^^ HTMLElement

src/components/Editor/SearchBar.js:208
208:       node.setSelectionRange(0, node.value.length);
                                          ^^^^^ property `value`. Property not found in
208:       node.setSelectionRange(0, node.value.length);
                                     ^^^^ HTMLElement

src/components/Editor/SearchBar.js:213
213:     return findDOMNode(this).querySelector("input");
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call of method `querySelector`. Method cannot be called on possibly null value
213:     return findDOMNode(this).querySelector("input");
                ^^^^^^^^^^^^^^^^^ null

src/components/Editor/SearchBar.js:213
213:     return findDOMNode(this).querySelector("input");
                                  ^^^^^^^^^^^^^ property `querySelector`. Property not found in
213:     return findDOMNode(this).querySelector("input");
                ^^^^^^^^^^^^^^^^^ Text

src/components/Editor/Tabs.js:40
 40:   return sourceTabs.filter((tab, index) => {
              ^ call of method `filter`. Method cannot be called on possibly undefined value
 40:   return sourceTabs.filter((tab, index) => {
              ^^^^^^^^^^ undefined

src/components/Editor/Tabs.js:131
131:     const tabs = sourceTabs.map(t => t.get("id"));
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call of method `map`. Method cannot be called on possibly undefined value
131:     const tabs = sourceTabs.map(t => t.get("id"));
                      ^^^^^^^^^^ undefined

src/components/Editor/Tabs.js:132
132:     const otherTabs = sourceTabs.filter(t => t.get("id") !== tab);
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call of method `filter`. Method cannot be called on possibly undefined value
132:     const otherTabs = sourceTabs.filter(t => t.get("id") !== tab);
                           ^^^^^^^^^^ undefined

src/components/Editor/Tabs.js:133
133:     const sourceTab = sourceTabs.find(t => t.get("id") == tab);
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call of method `find`. Method cannot be called on possibly undefined value
133:     const sourceTab = sourceTabs.find(t => t.get("id") == tab);
                           ^^^^^^^^^^ undefined

src/components/Editor/Tabs.js:134
134:     const tabURLs = sourceTabs.map(thisTab => thisTab.get("url"));
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call of method `map`. Method cannot be called on possibly undefined value
134:     const tabURLs = sourceTabs.map(thisTab => thisTab.get("url"));
                         ^^^^^^^^^^ undefined

src/components/Editor/Tabs.js:259
259:       sourceTabs.map(this.renderTab)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call of method `map`. Method cannot be called on possibly undefined value
259:       sourceTabs.map(this.renderTab)
           ^^^^^^^^^^ undefined

src/components/SecondaryPanes/Breakpoints.js:129
129:       (breakpoints.size === 0 ?
                        ^^^^ property `size`. Property not found in possibly undefined value
129:       (breakpoints.size === 0 ?
            ^^^^^^^^^^^ undefined

src/components/SecondaryPanes/Breakpoints.js:131
131:        breakpoints.valueSeq().map(bp => {
            ^^^^^^^^^^^^^^^^^^^^^^ call of method `valueSeq`. Method cannot be called on possibly undefined value
131:        breakpoints.valueSeq().map(bp => {
            ^^^^^^^^^^^ undefined

src/components/SecondaryPanes/ChromeScopes.js:55
 55:     this.objectCache = {};
              ^^^^^^^^^^^ property `objectCache`. Property not found in
 55:     this.objectCache = {};
         ^^^^ React component

src/components/SecondaryPanes/ChromeScopes.js:114
114:     this.props.loadedObjects.get(item.contents.value.objectId);
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call of method `get`. Method cannot be called on possibly undefined value
114:     this.props.loadedObjects.get(item.contents.value.objectId);
         ^^^^^^^^^^^^^^^^^^^^^^^^ undefined

src/components/SecondaryPanes/ChromeScopes.js:134
134:       if (this.objectCache[key]) {
                    ^^^^^^^^^^^ property `objectCache`. Property not found in
134:       if (this.objectCache[key]) {
               ^^^^ React component

src/components/SecondaryPanes/ChromeScopes.js:141
141:         this.objectCache[objectId] = children;
                  ^^^^^^^^^^^ property `objectCache`. Property not found in
141:         this.objectCache[objectId] = children;
             ^^^^ React component

src/components/SecondaryPanes/ChromeScopes.js:153
153:       loadObjectProperties(item.contents.value);
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function call. Function cannot be called on possibly undefined value
153:       loadObjectProperties(item.contents.value);
           ^^^^^^^^^^^^^^^^^^^^ undefined

src/components/SecondaryPanes/ChromeScopes.js:158
158:     return this.props.scopes.map(scope => {
                ^ call of method `map`. Method cannot be called on possibly undefined value
158:     return this.props.scopes.map(scope => {
                ^^^^^^^^^^^^^^^^^ undefined

src/components/SecondaryPanes/CommandBar.js:79
 79:     button.style.opacity = "1";
                ^^^^^ property `style`. Property cannot be accessed on possibly null value
 79:     button.style.opacity = "1";
         ^^^^^^ null

src/components/SecondaryPanes/CommandBar.js:80
 80:     button.style.transform = "none";
                ^^^^^ property `style`. Property cannot be accessed on possibly null value
 80:     button.style.transform = "none";
         ^^^^^^ null

src/components/SecondaryPanes/CommandBar.js:151
151:     this.props[action]();
         ^^^^^^^^^^^^^^^^^^^^ call of computed property. Function cannot be called on possibly undefined value
103:     resume: PropTypes.func,
                 ^^^^^^^^^^^^^^ undefined

src/components/SecondaryPanes/CommandBar.js:151
151:     this.props[action]();
         ^^^^^^^^^^^^^^^^^^^^ call of computed property. Function cannot be called on possibly undefined value
104:     stepIn: PropTypes.func,
                 ^^^^^^^^^^^^^^ undefined

src/components/SecondaryPanes/CommandBar.js:151
151:     this.props[action]();
         ^^^^^^^^^^^^^^^^^^^^ call of computed property. Function cannot be called on possibly undefined value
105:     stepOut: PropTypes.func,
                  ^^^^^^^^^^^^^^ undefined

src/components/SecondaryPanes/CommandBar.js:151
151:     this.props[action]();
         ^^^^^^^^^^^^^^^^^^^^ call of computed property. Function cannot be called on possibly undefined value
106:     stepOver: PropTypes.func,
                   ^^^^^^^^^^^^^^ undefined

src/components/SecondaryPanes/CommandBar.js:152
152:     const button = findDOMNode(this).querySelector(`.${action}`);
                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call of method `querySelector`. Method cannot be called on possibly null value
152:     const button = findDOMNode(this).querySelector(`.${action}`);
                        ^^^^^^^^^^^^^^^^^ null

src/components/SecondaryPanes/CommandBar.js:152
152:     const button = findDOMNode(this).querySelector(`.${action}`);
                                          ^^^^^^^^^^^^^ property `querySelector`. Property not found in
152:     const button = findDOMNode(this).querySelector(`.${action}`);
                        ^^^^^^^^^^^^^^^^^ Text

src/components/SecondaryPanes/CommandBar.js:228
228:         () => pauseOnExceptions(true, true),
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function call. Function cannot be called on possibly undefined value
228:         () => pauseOnExceptions(true, true),
                   ^^^^^^^^^^^^^^^^^ undefined

src/components/SecondaryPanes/CommandBar.js:237
237:         () => pauseOnExceptions(true, false),
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function call. Function cannot be called on possibly undefined value
237:         () => pauseOnExceptions(true, false),
                   ^^^^^^^^^^^^^^^^^ undefined

src/components/SecondaryPanes/CommandBar.js:245
245:       () => pauseOnExceptions(false, false),
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function call. Function cannot be called on possibly undefined value
245:       () => pauseOnExceptions(false, false),
                 ^^^^^^^^^^^^^^^^^ undefined

src/components/SecondaryPanes/Expressions.js:144
144:         getObjectProperties: id => loadedObjects.get(id),
                                        ^^^^^^^^^^^^^^^^^^^^^ call of method `get`. Method cannot be called on possibly undefined value
144:         getObjectProperties: id => loadedObjects.get(id),
                                        ^^^^^^^^^^^^^ undefined

src/components/SecondaryPanes/Expressions.js:192
192:       expressions.map(this.renderExpression),
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call of method `map`. Method cannot be called on possibly undefined value
192:       expressions.map(this.renderExpression),
           ^^^^^^^^^^^ undefined

src/components/SecondaryPanes/Frames.js:101
101:         onMouseDown: (e) => this.onMouseDown(e, frame, selectedFrame),
                                                            ^^^^^^^^^^^^^ undefined. This type is incompatible with the expected param type of
111:   onMouseDown(e: SyntheticKeyboardEvent, frame: Frame, selectedFrame: Frame) {
                                                                           ^^^^^ object type

src/components/SecondaryPanes/Frames.js:102
102:         onKeyUp: (e) => this.onKeyUp(e, frame, selectedFrame),
                                                    ^^^^^^^^^^^^^ undefined. This type is incompatible with the expected param type of
118:   onKeyUp(event: SyntheticKeyboardEvent, frame: Frame, selectedFrame: Frame) {
                                                                           ^^^^^ object type

src/components/SecondaryPanes/Scopes.js:63
 63:         getObjectProperties: id => loadedObjects.get(id),
                                        ^^^^^^^^^^^^^^^^^^^^^ call of method `get`. Method cannot be called on possibly undefined value
 63:         getObjectProperties: id => loadedObjects.get(id),
                                        ^^^^^^^^^^^^^ undefined

src/components/SecondaryPanes/index.js:73
 73:       breakpoints.some(x => x.disabled);
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call of method `some`. Method cannot be called on possibly undefined value
 73:       breakpoints.some(x => x.disabled);
           ^^^^^^^^^^^ undefined

src/components/SecondaryPanes/index.js:75
 75:     if (breakpoints.size == 0) {
                         ^^^^ property `size`. Property not found in possibly undefined value
 75:     if (breakpoints.size == 0) {
             ^^^^^^^^^^^ undefined

src/components/SourcesTree.js:87
 87:     if (nextProps.sources.size === 0) {
                               ^^^^ property `size`. Property not found in possibly undefined value
 87:     if (nextProps.sources.size === 0) {
             ^^^^^^^^^^^^^^^^^ undefined

src/components/SourcesTree.js:92
 92:     const next = Set(nextProps.sources.valueSeq());
                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call of method `valueSeq`. Method cannot be called on possibly undefined value
 92:     const next = Set(nextProps.sources.valueSeq());
                          ^^^^^^^^^^^^^^^^^ undefined

src/components/SourcesTree.js:93
 93:     const prev = Set(this.props.sources.valueSeq());
                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call of method `valueSeq`. Method cannot be called on possibly undefined value
 93:     const prev = Set(this.props.sources.valueSeq());
                          ^^^^^^^^^^^^^^^^^^ undefined

src/components/shared/Autocomplete.js:36
 36:     const searchInput = findDOMNode(this).querySelector("input");
                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call of method `querySelector`. Method cannot be called on possibly null value
 36:     const searchInput = findDOMNode(this).querySelector("input");
                             ^^^^^^^^^^^^^^^^^ null

src/components/shared/Autocomplete.js:36
 36:     const searchInput = findDOMNode(this).querySelector("input");
                                               ^^^^^^^^^^^^^ property `querySelector`. Property not found in
 36:     const searchInput = findDOMNode(this).querySelector("input");
                             ^^^^^^^^^^^^^^^^^ Text

src/components/shared/Autocomplete.js:37
 37:     searchInput.focus();
         ^^^^^^^^^^^^^^^^^^^ call of method `focus`. Method cannot be called on possibly null value
 37:     searchInput.focus();
         ^^^^^^^^^^^ null

src/components/shared/Autocomplete.js:38
 38:     searchInput.setSelectionRange(endOfInput, endOfInput);
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call of method `setSelectionRange`. Method cannot be called on possibly null value
 38:     searchInput.setSelectionRange(endOfInput, endOfInput);
         ^^^^^^^^^^^ null

src/components/shared/Autocomplete.js:38
 38:     searchInput.setSelectionRange(endOfInput, endOfInput);
                     ^^^^^^^^^^^^^^^^^ property `setSelectionRange`. Property not found in
 38:     searchInput.setSelectionRange(endOfInput, endOfInput);
         ^^^^^^^^^^^ HTMLElement


Found 47 errors
error Command failed with exit code 2.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

yarn run flow returned exit code 1