react: Minified React error #[object Object]

Here are a couple blocks above and the rest of the block that contains the function call in frame 2.

    function Dn(e, t, n, r, o) {
        function a(e, t, n) {
            var i = t.expirationTime;
            t.child = null === e ? Ao(t, null, n, i) : $o(t, e.child, n, i)
        }
        function s(e, t) {
            var n = t.ref;
            null === n || e && e.ref === n || (t.effectTag |= 128)
        }
        function l(e, t, n, i) {
            if (s(e, t),
            !n)
                return i && on(t, !1),
                d(e, t);
            n = t.stateNode,
            zr.current = t;
            var r = n.render();
            return t.effectTag |= 1,
            a(e, t, r),
            t.memoizedState = n.state,
            t.memoizedProps = n.props,
            i && on(t, !0),
            t.child
        }
        function c(e) {
            var t = e.stateNode;
            t.pendingContext ? tn(e, t.pendingContext, t.pendingContext !== t.context) : t.context && tn(e, t.context, !1),
            g(e, t.containerInfo)
        }
        function d(e, t) {
            if (null !== e && t.child !== e.child ? i("153") : void 0,
            null !== t.child) {
                e = t.child;
                var n = sn(e, e.pendingProps, e.expirationTime);
                for (t.child = n,
                n.return = t; null !== e.sibling; )
                    e = e.sibling,
                    n = n.sibling = sn(e, e.pendingProps, e.expirationTime),
                    n.return = t;
                n.sibling = null
            }
            return t.child
        }
        function u(e, t) {
            switch (t.tag) {
            case 3:
                c(t);
                break;
            case 2:
                rn(t);
                break;
            case 4:
                g(t, t.stateNode.containerInfo)
            }
            return null
        }
        var h = e.shouldSetTextContent
          , p = e.useSyncScheduling
          , f = e.shouldDeprioritizeSubtree
          , m = t.pushHostContext
          , g = t.pushHostContainer
          , v = n.enterHydrationState
          , y = n.resetHydrationState
          , b = n.tryToClaimNextHydratableInstance;
        e = Cn(r, o, function(e, t) {
            e.memoizedProps = t
        }, function(e, t) {
            e.memoizedState = t
        });
        var _ = e.adoptClassInstance
          , w = e.constructClassInstance
          , x = e.mountClassInstance
          , k = e.updateClassInstance;
        return {
            beginWork: function(e, t, n) {
                if (0 === t.expirationTime || t.expirationTime > n)
                    return u(e, t);
                switch (t.tag) {
                case 0:
                    null !== e ? i("155") : void 0;
                    var r = t.type
                      , o = t.pendingProps
                      , C = Kt(t);
                    return C = Zt(t, C),
                    r = r(o, C),
                    t.effectTag |= 1,
                    "object" == typeof r && null !== r && "function" == typeof r.render ? (t.tag = 2,
                    o = rn(t),
                    _(t, r),
                    x(t, n),
                    t = l(e, t, !0, o)) : (t.tag = 1,
                    a(e, t, r),
                    t.memoizedProps = o,
                    t = t.child),
                    t;
                case 1:
                    e: {
                        if (o = t.type,
                        n = t.pendingProps,
                        r = t.memoizedProps,
                        mo.current)
                            null === n && (n = r);
                        else if (null === n || r === n) {
                            t = d(e, t);
                            break e
                        }
                        r = Kt(t),
                        r = Zt(t, r),
                        o = o(n, r),
                        t.effectTag |= 1,
                        a(e, t, o),
                        t.memoizedProps = n,
                        t = t.child
                    }
                    return t;
                case 2:
                    return o = rn(t),
                    r = void 0,
                    null === e ? t.stateNode ? i("153") : (w(t, t.pendingProps),
                    x(t, n),
                    r = !0) : r = k(e, t, n),
                    l(e, t, r, o);
                case 3:
                    return c(t),
                    o = t.updateQueue,
                    null !== o ? (r = t.memoizedState,
                    o = xn(e, t, o, null, null, n),
                    r === o ? (y(),
                    t = d(e, t)) : (r = o.element,
                    C = t.stateNode,
                    (null === e || null === e.child) && C.hydrate && v(t) ? (t.effectTag |= 2,
                    t.child = Ao(t, null, r, n)) : (y(),
                    a(e, t, r)),
                    t.memoizedState = o,
                    t = t.child)) : (y(),
                    t = d(e, t)),
                    t;
                case 5:
                    m(t),
                    null === e && b(t),
                    o = t.type;
                    var S = t.memoizedProps;
                    return r = t.pendingProps,
                    null === r && (r = S,
                    null === r ? i("154") : void 0),
                    C = null !== e ? e.memoizedProps : null,
                    mo.current || null !== r && S !== r ? (S = r.children,
                    h(o, r) ? S = null : C && h(o, C) && (t.effectTag |= 16),
                    s(e, t),
                    2147483647 !== n && !p && f(o, r) ? (t.expirationTime = 2147483647,
                    t = null) : (a(e, t, S),
                    t.memoizedProps = r,
                    t = t.child)) : t = d(e, t),
                    t;
                case 6:
                    return null === e && b(t),
                    e = t.pendingProps,
                    null === e && (e = t.memoizedProps),
                    t.memoizedProps = e,
                    null;
                case 8:
                    t.tag = 7;
                case 7:
                    return o = t.pendingProps,
                    mo.current ? null === o && (o = e && e.memoizedProps,
                    null === o ? i("154") : void 0) : null !== o && t.memoizedProps !== o || (o = t.memoizedProps),
                    r = o.children,
                    t.stateNode = null === e ? Ao(t, t.stateNode, r, n) : $o(t, t.stateNode, r, n),
                    t.memoizedProps = o,
                    t.stateNode;
                case 9:
                    return null;
                case 4:
                    e: {
                        if (g(t, t.stateNode.containerInfo),
                        o = t.pendingProps,
                        mo.current)
                            null === o && (o = e && e.memoizedProps,
                            null == o ? i("154") : void 0);
                        else if (null === o || t.memoizedProps === o) {
                            t = d(e, t);
                            break e
                        }
                        null === e ? t.child = $o(t, null, o, n) : a(e, t, o),
                        t.memoizedProps = o,
                        t = t.child
                    }
                    return t;
                case 10:
                    e: {
                        if (n = t.pendingProps,
                        mo.current)
                            null === n && (n = t.memoizedProps);
                        else if (null === n || t.memoizedProps === n) {
                            t = d(e, t);
                            break e
                        }
                        a(e, t, n),
                        t.memoizedProps = n,
                        t = t.child
                    }
                    return t;
                default:
                    i("156")
                }
            },
            beginFailedWork: function(e, t, n) {
                switch (t.tag) {
                case 2:
                    rn(t);
                    break;
                case 3:
                    c(t);
                    break;
                default:
                    i("157")
                }
                return t.effectTag |= 64,
                null === e ? t.child = null : t.child !== e.child && (t.child = e.child),
                0 === t.expirationTime || t.expirationTime > n ? u(e, t) : (t.firstEffect = null,
                t.lastEffect = null,
                t.child = null === e ? Ao(t, null, null, n) : $o(t, e.child, null, n),
                2 === t.tag && (e = t.stateNode,
                t.memoizedProps = e.props,
                t.memoizedState = e.state),
                t.child)
            }
        }
    }
    function En(e, t, n) {
        function r(e) {
            e.effectTag |= 4
        }
        var o = e.createInstance
          , a = e.createTextInstance
          , s = e.appendInitialChild
          , l = e.finalizeInitialChildren
          , c = e.prepareUpdate
          , d = e.persistence
          , u = t.getRootHostContainer
          , h = t.popHostContext
          , p = t.getHostContext
          , f = t.popHostContainer
          , m = n.prepareToHydrateHostInstance
          , g = n.prepareToHydrateHostTextInstance
          , v = n.popHydrationState
          , y = void 0
          , b = void 0
          , _ = void 0;
        return e.mutation ? (y = function() {}
        ,
        b = function(e, t, n) {
            (t.updateQueue = n) && r(t)
        }
        ,
        _ = function(e, t, n, i) {
            n !== i && r(t)
        }
        ) : i(d ? "235" : "236"),
        {
            completeWork: function(e, t, n) {
                var d = t.pendingProps;
                switch (null === d ? d = t.memoizedProps : 2147483647 === t.expirationTime && 2147483647 !== n || (t.pendingProps = null),
                t.tag) {
                case 1:
                    return null;
                case 2:
                    return en(t),
                    null;
                case 3:
                    return f(t),
                    Gt(mo, t),
                    Gt(fo, t),
                    d = t.stateNode,
                    d.pendingContext && (d.context = d.pendingContext,
                    d.pendingContext = null),
                    null !== e && null !== e.child || (v(t),
                    t.effectTag &= -3),
                    y(t),
                    null;
                case 5:
                    h(t),
                    n = u();
                    var w = t.type;
                    if (null !== e && null != t.stateNode) {
                        var x = e.memoizedProps
                          , k = t.stateNode
                          , C = p();
                        k = c(k, w, x, d, n, C),
                        b(e, t, k, w, x, d, n),
                        e.ref !== t.ref && (t.effectTag |= 128)
                    } else {
                        if (!d)
                            return null === t.stateNode ? i("166") : void 0,
                            null;
                        if (e = p(),
                        v(t))
                            m(t, n, e) && r(t);
                        else {
                            e = o(w, d, n, e, t);
                            e: for (x = t.child; null !== x; ) {
                                if (5 === x.tag || 6 === x.tag)
                                    s(e, x.stateNode);
                                else if (4 !== x.tag && null !== x.child) {
                                    x.child.return = x,
                                    x = x.child;
                                    continue
                                }
                                if (x === t)
                                    break;
                                for (; null === x.sibling; ) {
                                    if (null === x.return || x.return === t)
                                        break e;
                                    x = x.return
                                }
                                x.sibling.return = x.return,
                                x = x.sibling
                            }
                            l(e, w, d, n) && r(t),
                            t.stateNode = e
                        }
                        null !== t.ref && (t.effectTag |= 128)
                    }
                    return null;
                case 6:
                    if (e && null != t.stateNode)
                        _(e, t, e.memoizedProps, d);
                    else {
                        if ("string" != typeof d)
                            return null === t.stateNode ? i("166") : void 0,
                            null;
                        e = u(),
                        n = p(),
                        v(t) ? g(t) && r(t) : t.stateNode = a(d, e, n, t)
                    }
                    return null;
                case 7:
                    (d = t.memoizedProps) ? void 0 : i("165"),
                    t.tag = 8,
                    w = [];
                    e: for ((x = t.stateNode) && (x.return = t); null !== x; ) {
                        if (5 === x.tag || 6 === x.tag || 4 === x.tag)
                            i("247");
                        else if (9 === x.tag)
                            w.push(x.type);
                        else if (null !== x.child) {
                            x.child.return = x,
                            x = x.child;
                            continue
                        }
                        for (; null === x.sibling; ) {
                            if (null === x.return || x.return === t)
                                break e;
                            x = x.return
                        }
                        x.sibling.return = x.return,
                        x = x.sibling
                    }
                    return x = d.handler,
                    d = x(d.props, w),
                    t.child = $o(t, null !== e ? e.child : null, d, n),
                    t.child;
                case 8:
                    return t.tag = 7,
                    null;
                case 9:
                    return null;
                case 10:
                    return null;
                case 4:
                    return f(t),
                    y(t),
                    null;
                case 0:
                    i("167");
                default:
                    i("156")
                }
            }
        }
    }
    function Mn(e, t) {
        function n(e) {
            switch ("function" == typeof vn && vn(e),
            e.tag) {
            case 2:
                i(e);
                var n = e.stateNode;
                if ("function" == typeof n.componentWillUnmount)
                    try {
                        n.props = e.memoizedProps,
                        n.state = e.memoizedState,
                        n.componentWillUnmount()
                    } catch (i) {
                        t(e, i)
                    }
                break;
            case 5:
                i(e);
                break;
            case 7:
                r(e.stateNode);
                break;
            case 4:
                l && a(e)
            }
        }
        function r(e) {
            for (var t = e; ; )
                if (n(t),
                null === t.child || l && 4 === t.tag) {
                    if (t === e)
                        break;
                    for (; null === t.sibling; ) {
                        if (null === t.return || t.return === e)
                            return;
                        t = t.return
                    }
                    t.sibling.return = t.return,
                    t = t.sibling
                } else
                    t.child.return = t,
                    t = t.child
        }
        function o(e) {
            return 5 === e.tag || 3 === e.tag || 4 === e.tag
        }
        function a(e) {
            for (var t = e, o = !1, a = void 0, s = void 0; ; ) {
                if (!o) {
                    o = t.return;
                    e: for (; ; ) {
                        switch (null === o ? i("160") : void 0,
                        o.tag) {
                        case 5:
                            a = o.stateNode,
                            s = !1;
                            break e;
                        case 3:
                            a = o.stateNode.containerInfo,
                            s = !0;
                            break e;
                        case 4:
                            a = o.stateNode.containerInfo,
                            s = !0;
                            break e
                        }
                        o = o.return
                    }
                    o = !0
                }
                if (5 === t.tag || 6 === t.tag)
                    r(t),
                    s ? y(a, t.stateNode) : v(a, t.stateNode);
                else if (4 === t.tag ? a = t.stateNode.containerInfo : n(t),
                null !== t.child) {
                    t.child.return = t,
                    t = t.child;
                    continue
                }
                if (t === e)
                    break;
                for (; null === t.sibling; ) {
                    if (null === t.return || t.return === e)
                        return;
                    t = t.return,
                    4 === t.tag && (o = !1)
                }
                t.sibling.return = t.return,
                t = t.sibling
            }
        }
        
        var s = e.getPublicInstance
          , l = e.mutation;
        e = e.persistence,
        l || i(e ? "235" : "236");
        var c = l.commitMount
          , d = l.commitUpdate
          , u = l.resetTextContent
          , h = l.commitTextUpdate
          , p = l.appendChild
          , f = l.appendChildToContainer
          , m = l.insertBefore
          , g = l.insertInContainerBefore
          , v = l.removeChild
          , y = l.removeChildFromContainer;
        return {
            commitResetTextContent: function(e) {
                u(e.stateNode)
            },
            commitPlacement: function(e) {
                e: {
                    for (var t = e.return; null !== t; ) {
                        if (o(t)) {
                            var n = t;
                            break e
                        }
                        t = t.return
                    }
                    i("160"),
                    n = void 0
                }
                var r = t = void 0;
                switch (n.tag) {
                case 5:
                    t = n.stateNode,
                    r = !1;
                    break;
                case 3:
                    t = n.stateNode.containerInfo,
                    r = !0;
                    break;
                case 4:
                    t = n.stateNode.containerInfo,
                    r = !0;
                    break;
                default:
                    i("161")
                }
                16 & n.effectTag && (u(t),
                n.effectTag &= -17);
                e: t: for (n = e; ; ) {
                    for (; null === n.sibling; ) {
                        if (null === n.return || o(n.return)) {
                            n = null;
                            break e
                        }
                        n = n.return
                    }
                    for (n.sibling.return = n.return,
                    n = n.sibling; 5 !== n.tag && 6 !== n.tag; ) {
                        if (2 & n.effectTag)
                            continue t;
                        if (null === n.child || 4 === n.tag)
                            continue t;
                        n.child.return = n,
                        n = n.child
                    }
                    if (!(2 & n.effectTag)) {
                        n = n.stateNode;
                        break e
                    }
                }
                for (var a = e; ; ) {
                    if (5 === a.tag || 6 === a.tag)
                        n ? r ? g(t, a.stateNode, n) : m(t, a.stateNode, n) : r ? f(t, a.stateNode) : p(t, a.stateNode);
                    else if (4 !== a.tag && null !== a.child) {
                        a.child.return = a,
                        a = a.child;
                        continue
                    }
                    if (a === e)
                        break;
                    for (; null === a.sibling; ) {
                        if (null === a.return || a.return === e)
                            return;
                        a = a.return
                    }
                    a.sibling.return = a.return,
                    a = a.sibling
                }
            },
            commitDeletion: function(e) {
                a(e),
                e.return = null,
                e.child = null,
                e.alternate && (e.alternate.child = null,
                e.alternate.return = null)
            },
            commitWork: function(e, t) {
                switch (t.tag) {
                case 2:
                    break;
                case 5:
                    var n = t.stateNode;
                    if (null != n) {
                        var r = t.memoizedProps;
                        e = null !== e ? e.memoizedProps : r;
                        var o = t.type
                          , a = t.updateQueue;
                        t.updateQueue = null,
                        null !== a && d(n, a, o, e, r, t)
                    }
                    break;
                case 6:
                    null === t.stateNode ? i("162") : void 0,
                    n = t.memoizedProps,
                    h(t.stateNode, null !== e ? e.memoizedProps : n, n);
                    break;
                case 3:
                    break;
                default:
                    i("163")
                }
            },
            commitLifeCycles: function(e, t) {
                switch (t.tag) {
                case 2:
                    var n = t.stateNode;
                    if (4 & t.effectTag)
                        if (null === e)
                            n.props = t.memoizedProps,
                            n.state = t.memoizedState,
                            n.componentDidMount();
                        else {
                            var r = e.memoizedProps;
                            e = e.memoizedState,
                            n.props = t.memoizedProps,
                            n.state = t.memoizedState,
                            n.componentDidUpdate(r, e)
                        }
                    t = t.updateQueue,
                    null !== t && kn(t, n);
                    break;
                case 3:
                    n = t.updateQueue,
                    null !== n && kn(n, null !== t.child ? t.child.stateNode : null);
                    break;
                case 5:
                    n = t.stateNode,
                    null === e && 4 & t.effectTag && c(n, t.type, t.memoizedProps, t);
                    break;
                case 6:
                    break;
                case 4:
                    break;
                default:
                    i("163")
                }
            },
            commitAttachRef: function(e) {
                var t = e.ref;
                if (null !== t) {
                    var n = e.stateNode;
                    switch (e.tag) {
                    case 5:
                        t(s(n));
                        break;
                    default:
                        t(n)
                    }
                }
            },
            commitDetachRef: function(e) {
                e = e.ref,
                null !== e && e(null)
            }
        }
    }

React version: 16.2.0 I’m not using Webpack, I’m using rails asset pipeline and uglifier. Uglifier is version (2.5.3).