Fission: Debugger BP Exception

Exception { name: "NS_ERROR_FAILURE", message: "Failed to open input source 'file:///'", result: 2147500037, filename: "resource://devtools/shared/DevToolsUtils.js", lineNumber: 678, columnNumber: 0, data: XPCWrappedNative_NoHelper, stack: "mainThreadFetch/<@resource://devtools/shared/DevToolsUtils.js:678:15\nmainThreadFetch@resource://devtools/shared/DevToolsUtils.js:530:10\n_fetchURLContents@resource://devtools/server/actors/utils/TabSources.js:580:22\nurlContents@resource://devtools/server/actors/utils/TabSources.js:547:17\n_resurrectSource@resource://devtools/server/actors/thread.js:2033:69\naddAllSources@resource://devtools/server/actors/thread.js:1334:14\nonSources@resource://devtools/server/actors/thread.js:1340:10\nonPacket@resource://devtools/server/debugger-server-connection.js:378:58\nreceiveMessage@resource://devtools/shared/transport/child-transport.js:66:16\nMessageListener.receiveMessage*_addListener@resource://devtools/shared/transport/child-transport.js:40:14\nready@resource://devtools/shared/transport/child-transport.js:57:10\n_onConnection@resource://devtools/server/debugger-server.js:450:15\nconnectToParent@resource://devtools/server/debugger-server.js:331:17\ninit@resource://devtools/server/startup/content-process.jsm:69:31\nonInit@resource://devtools/server/startup/content-process.js:25:9\nMessageListener.receiveMessage*@resource://devtools/server/startup/content-process.js:34:19\n", location: XPCWrappedNative_NoHelper }
ThreadSafeDevToolsUtils.js:90:13
    reportException resource://devtools/shared/ThreadSafeDevToolsUtils.js:90
    _reportLoadSourceError resource://devtools/server/actors/utils/TabSources.js:597
    _fetchURLContents resource://devtools/server/actors/utils/TabSources.js:586
    urlContents resource://devtools/server/actors/utils/TabSources.js:547
    _resurrectSource resource://devtools/server/actors/thread.js:2033
    addAllSources resource://devtools/server/actors/thread.js:1334
    onSources resource://devtools/server/actors/thread.js:1340
    onPacket resource://devtools/server/debugger-server-connection.js:378
    receiveMessage resource://devtools/shared/transport/child-transport.js:66
    _addListener resource://devtools/shared/transport/child-transport.js:40
    ready resource://devtools/shared/transport/child-transport.js:57
    _onConnection resource://devtools/server/debugger-server.js:450
    connectToParent resource://devtools/server/debugger-server.js:331
    init resource://devtools/server/startup/content-process.jsm:69
    onInit resource://devtools/server/startup/content-process.js:25
    <anonymous> resource://devtools/server/startup/content-process.js:34


Exception
​
columnNumber: 0
​
data: XPCWrappedNative_NoHelper { asyncOpen: asyncOpen(), originalURI: Getter & Setter, QueryInterface: QueryInterface(), … }
​
filename: "resource://devtools/shared/DevToolsUtils.js"
​
lineNumber: 678
​
location: XPCWrappedNative_NoHelper { QueryInterface: QueryInterface(), filename: Getter, name: Getter, … }
​
message: "Failed to open input source 'file:///'"
​
name: "NS_ERROR_FAILURE"
​
result: 2147500037
​
stack: "mainThreadFetch/<@resource://devtools/shared/DevToolsUtils.js:678:15\nmainThreadFetch@resource://devtools/shared/DevToolsUtils.js:530:10\n_fetchURLContents@resource://devtools/server/actors/utils/TabSources.js:580:22\nurlContents@resource://devtools/server/actors/utils/TabSources.js:547:17\n_resurrectSource@resource://devtools/server/actors/thread.js:2033:69\naddAllSources@resource://devtools/server/actors/thread.js:1334:14\nonSources@resource://devtools/server/actors/thread.js:1340:10\nonPacket@resource://devtools/server/debugger-server-connection.js:378:58\nreceiveMessage@resource://devtools/shared/transport/child-transport.js:66:16\nMessageListener.receiveMessage*_addListener@resource://devtools/shared/transport/child-transport.js:40:14\nready@resource://devtools/shared/transport/child-transport.js:57:10\n_onConnection@resource://devtools/server/debugger-server.js:450:15\nconnectToParent@resource://devtools/server/debugger-server.js:331:17\ninit@resource://devtools/server/startup/content-process.jsm:69:31\nonInit@resource://devtools/server/startup/content-process.js:25:9\nMessageListener.receiveMessage*@resource://devtools/server/startup/content-process.js:34:19\n"
​
<prototype>: ExceptionPrototype { toString: toString(), name: Getter, message: Getter, … }
ThreadSafeDevToolsUtils.js:90:13
    reportException resource://devtools/shared/ThreadSafeDevToolsUtils.js:90
    _reportLoadSourceError resource://devtools/server/actors/utils/TabSources.js:597
    _fetchURLContents resource://devtools/server/actors/utils/TabSources.js:586
    urlContents resource://devtools/server/actors/utils/TabSources.js:547
    _resurrectSource resource://devtools/server/actors/thread.js:2033
    addAllSources resource://devtools/server/actors/thread.js:1334
    onSources resource://devtools/server/actors/thread.js:1340
    onPacket resource://devtools/server/debugger-server-connection.js:378
    receiveMessage resource://devtools/shared/transport/child-transport.js:66
    _addListener resource://devtools/shared/transport/child-transport.js:40
    ready resource://devtools/shared/transport/child-transport.js:57
    _onConnection resource://devtools/server/debugger-server.js:450
    connectToParent resource://devtools/server/debugger-server.js:331
    init resource://devtools/server/startup/content-process.jsm:69
    onInit resource://devtools/server/startup/content-process.js:25
    <anonymous> resource://devtools/server/startup/content-process.js:34