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Zach 2024-10-02T11:52:40.575639Z
I’m getting a cannot invoke “Object.hashCode()” because key is null. It’s coming from a macro that expands to a do block that ultimately returns a custom type. Should I implement a protocol on the custom type or is this a cider issue?
mkvlr 2024-10-02T13:34:11.179719Z
can you paste a stacktrace?
Zach 2024-10-02T13:38:02.861159Z
1. Unhandled java.lang.NullPointerException
Cannot invoke "Object.hashCode()" because "key" is null
ConcurrentHashMap.java: 936 java.util.concurrent.ConcurrentHashMap/get
Namespace.java: 188 clojure.lang.Namespace/find
core.clj: 4131 clojure.core/find-ns
core.clj: 4161 clojure.core/the-ns
core.clj: 4370 clojure.core/ns-resolve
core.clj: 4360 clojure.core/ns-resolve
core.clj: 4373 clojure.core/resolve
core.clj: 4373 clojure.core/resolve
viewer.cljc: 880 nextjournal.clerk.viewer$fn__22699/invokeStatic
viewer.cljc: 875 nextjournal.clerk.viewer$fn__22699/invoke
core.clj: 6231 clojure.core/update
core.clj: 6223 clojure.core/update
AFn.java: 160 clojure.lang.AFn/applyToHelper
RestFn.java: 132 clojure.lang.RestFn/applyTo
core.clj: 673 clojure.core/apply
core.clj: 662 clojure.core/apply
viewer.cljc: 391 nextjournal.clerk.viewer$update_val$fn__22520/invoke
viewer.cljc: 1367 nextjournal.clerk.viewer$apply_viewers_STAR_/invokeStatic
viewer.cljc: 1361 nextjournal.clerk.viewer$apply_viewers_STAR_/invoke
viewer.cljc: 1562 nextjournal.clerk.viewer$present_STAR_/invokeStatic
viewer.cljc: 1555 nextjournal.clerk.viewer$present_STAR_/invoke
viewer.cljc: 1514 nextjournal.clerk.viewer$present_PLUS_paginate_children$fn__22893/invoke
core.clj: 7366 clojure.core/map-indexed/fn/fn
core.clj: 2894 clojure.core/take/fn/fn
core.clj: 2942 clojure.core/drop/fn/fn
protocols.clj: 49 clojure.core.protocols/iter-reduce
protocols.clj: 75 clojure.core.protocols/fn
protocols.clj: 75 clojure.core.protocols/fn
protocols.clj: 13 clojure.core.protocols/fn/G
core.clj: 6947 clojure.core/transduce
core.clj: 6962 clojure.core/into
core.clj: 6950 clojure.core/into
viewer.cljc: 1512 nextjournal.clerk.viewer$present_PLUS_paginate_children/invokeStatic
viewer.cljc: 1503 nextjournal.clerk.viewer$present_PLUS_paginate_children/invoke
viewer.cljc: 1577 nextjournal.clerk.viewer$present_STAR_/invokeStatic
viewer.cljc: 1555 nextjournal.clerk.viewer$present_STAR_/invoke
viewer.cljc: 1514 nextjournal.clerk.viewer$present_PLUS_paginate_children$fn__22893/invoke
core.clj: 7366 clojure.core/map-indexed/fn/fn
core.clj: 2894 clojure.core/take/fn/fn
core.clj: 2942 clojure.core/drop/fn/fn
ArraySeq.java: 114 clojure.lang.ArraySeq/reduce
core.clj: 6946 clojure.core/transduce
core.clj: 6962 clojure.core/into
core.clj: 6950 clojure.core/into
viewer.cljc: 1512 nextjournal.clerk.viewer$present_PLUS_paginate_children/invokeStatic
viewer.cljc: 1503 nextjournal.clerk.viewer$present_PLUS_paginate_children/invoke
viewer.cljc: 1577 nextjournal.clerk.viewer$present_STAR_/invokeStatic
viewer.cljc: 1555 nextjournal.clerk.viewer$present_STAR_/invoke
viewer.cljc: 1514 nextjournal.clerk.viewer$present_PLUS_paginate_children$fn__22893/invoke
core.clj: 7366 clojure.core/map-indexed/fn/fn
core.clj: 2894 clojure.core/take/fn/fn
core.clj: 2942 clojure.core/drop/fn/fn
protocols.clj: 49 clojure.core.protocols/iter-reduce
protocols.clj: 75 clojure.core.protocols/fn
protocols.clj: 75 clojure.core.protocols/fn
protocols.clj: 13 clojure.core.protocols/fn/G
core.clj: 6947 clojure.core/transduce
core.clj: 6962 clojure.core/into
core.clj: 6950 clojure.core/into
viewer.cljc: 1512 nextjournal.clerk.viewer$present_PLUS_paginate_children/invokeStatic
viewer.cljc: 1503 nextjournal.clerk.viewer$present_PLUS_paginate_children/invoke
viewer.cljc: 1577 nextjournal.clerk.viewer$present_STAR_/invokeStatic
viewer.cljc: 1555 nextjournal.clerk.viewer$present_STAR_/invoke
viewer.cljc: 1514 nextjournal.clerk.viewer$present_PLUS_paginate_children$fn__22893/invoke
core.clj: 7366 clojure.core/map-indexed/fn/fn
core.clj: 2894 clojure.core/take/fn/fn
core.clj: 2942 clojure.core/drop/fn/fn
ArraySeq.java: 114 clojure.lang.ArraySeq/reduce
core.clj: 6946 clojure.core/transduce
core.clj: 6962 clojure.core/into
core.clj: 6950 clojure.core/into
viewer.cljc: 1512 nextjournal.clerk.viewer$present_PLUS_paginate_children/invokeStatic
viewer.cljc: 1503 nextjournal.clerk.viewer$present_PLUS_paginate_children/invoke
viewer.cljc: 1577 nextjournal.clerk.viewer$present_STAR_/invokeStatic
viewer.cljc: 1555 nextjournal.clerk.viewer$present_STAR_/invoke
viewer.cljc: 1514 nextjournal.clerk.viewer$present_PLUS_paginate_children$fn__22893/invoke
core.clj: 7366 clojure.core/map-indexed/fn/fn
core.clj: 2894 clojure.core/take/fn/fn
core.clj: 2942 clojure.core/drop/fn/fn
protocols.clj: 49 clojure.core.protocols/iter-reduce
protocols.clj: 75 clojure.core.protocols/fn
protocols.clj: 75 clojure.core.protocols/fn
protocols.clj: 13 clojure.core.protocols/fn/G
core.clj: 6947 clojure.core/transduce
core.clj: 6962 clojure.core/into
core.clj: 6950 clojure.core/into
viewer.cljc: 1512 nextjournal.clerk.viewer$present_PLUS_paginate_children/invokeStatic
viewer.cljc: 1503 nextjournal.clerk.viewer$present_PLUS_paginate_children/invoke
viewer.cljc: 1577 nextjournal.clerk.viewer$present_STAR_/invokeStatic
viewer.cljc: 1555 nextjournal.clerk.viewer$present_STAR_/invoke
viewer.cljc: 1514 nextjournal.clerk.viewer$present_PLUS_paginate_children$fn__22893/invoke
core.clj: 7366 clojure.core/map-indexed/fn/fn
core.clj: 2894 clojure.core/take/fn/fn
core.clj: 2942 clojure.core/drop/fn/fn
ArraySeq.java: 119 clojure.lang.ArraySeq/reduce
core.clj: 6946 clojure.core/transduce
core.clj: 6962 clojure.core/into
core.clj: 6950 clojure.core/into
viewer.cljc: 1512 nextjournal.clerk.viewer$present_PLUS_paginate_children/invokeStatic
viewer.cljc: 1503 nextjournal.clerk.viewer$present_PLUS_paginate_children/invoke
viewer.cljc: 1577 nextjournal.clerk.viewer$present_STAR_/invokeStatic
viewer.cljc: 1555 nextjournal.clerk.viewer$present_STAR_/invoke
viewer.cljc: 1659 nextjournal.clerk.viewer$present/invokeStatic
viewer.cljc: 1651 nextjournal.clerk.viewer$present/invoke
core.clj: 2586 clojure.core/comp/fn
core.clj: 2759 clojure.core/map/fn/fn
core.clj: 7682 clojure.core/preserving-reduced/fn
PersistentVector.java: 343 clojure.lang.PersistentVector/reduce
core.clj: 6885 clojure.core/reduce
core.clj: 7693 clojure.core/cat/fn
core.clj: 2759 clojure.core/map/fn/fn
PersistentVector.java: 343 clojure.lang.PersistentVector/reduce
core.clj: 6946 clojure.core/transduce
core.clj: 6962 clojure.core/into
core.clj: 6950 clojure.core/into
core.clj: 2648 clojure.core/partial/fn
core.clj: 6231 clojure.core/update
core.clj: 6223 clojure.core/update
viewer.cljc: 1190 nextjournal.clerk.viewer$process_blocks/invokeStatic
viewer.cljc: 1186 nextjournal.clerk.viewer$process_blocks/invoke
core.clj: 2641 clojure.core/partial/fn
core.clj: 6231 clojure.core/update
core.clj: 6223 clojure.core/update
viewer.cljc: 1219 nextjournal.clerk.viewer$fn__22802/invokeStatic
viewer.cljc: 1217 nextjournal.clerk.viewer$fn__22802/invoke
viewer.cljc: 1367 nextjournal.clerk.viewer$apply_viewers_STAR_/invokeStatic
viewer.cljc: 1361 nextjournal.clerk.viewer$apply_viewers_STAR_/invoke
viewer.cljc: 1562 nextjournal.clerk.viewer$present_STAR_/invokeStatic
viewer.cljc: 1555 nextjournal.clerk.viewer$present_STAR_/invoke
viewer.cljc: 1659 nextjournal.clerk.viewer$present/invokeStatic
viewer.cljc: 1651 nextjournal.clerk.viewer$present/invoke
view.clj: 12 nextjournal.clerk.view/doc->viewer
view.clj: 8 nextjournal.clerk.view/doc->viewer
view.clj: 9 nextjournal.clerk.view/doc->viewer
view.clj: 8 nextjournal.clerk.view/doc->viewer
webserver.clj: 122 nextjournal.clerk.webserver/present+reset!
webserver.clj: 121 nextjournal.clerk.webserver/present+reset!
webserver.clj: 137 nextjournal.clerk.webserver/update-doc!
webserver.clj: 133 nextjournal.clerk.webserver/update-doc!
clerk.clj: 70 nextjournal.clerk/show!
clerk.clj: 21 nextjournal.clerk/show!
clerk.clj: 32 nextjournal.clerk/show!
clerk.clj: 21 nextjournal.clerk/show!
REPL: 1 notebooks.scratch/eval46374Zach 2024-10-02T15:16:27.358419Z
I'm playing around with it. One issue is that my custom type doesn't implement clojure.lang.Counted
mkvlr 2024-10-02T15:18:06.896769Z
but is it seqable??
Zach 2024-10-02T15:19:32.452789Z
Yeah
Zach 2024-10-02T15:20:22.120319Z
Looks like it could be a macro issue
Zach 2024-10-02T15:20:32.170589Z
Does clerk do anything special with def forms?
mkvlr 2024-10-02T15:21:44.962089Z
does it throw on (take 1 custom-type)?
Zach 2024-10-02T15:23:05.743349Z
Let me test...
I got it to work by macroexpanding a macro that does a lot of def s and then deleting a line...
mkvlr 2024-10-02T15:23:58.292259Z
hmm, hard to follow from here…
mkvlr 2024-10-02T15:24:41.521849Z
does the custom type implement IDeref?
Zach 2024-10-02T15:25:01.479099Z
take works. It does implement deref
Zach 2024-10-02T15:25:35.764369Z
It may not be the custom type. I'm trying the same type but with simpler data and it's working.
mkvlr 2024-10-02T15:26:27.746369Z
I think your stacktrace points at it throwing in (#'clojure.core/deref-as-map your-custom-type)
mkvlr 2024-10-02T15:26:31.848429Z
(this is private)
Zach 2024-10-02T15:28:50.647659Z
Where do you see that in the stacktrace?
Zach 2024-10-02T15:31:01.282679Z
I think I've found the issue but I'm not sure why. I have a macro that expands to:
(do
(def ...)
(def ...)
(do
(def ...)
(cleanup ...))
...)do and def don't play well together?
2024-10-02T13:37:36.994119Z
I'm rendering a vega lite chart based on this https://vega.github.io/vega-lite/examples/layer_text_heatmap.html , it renders fine and I can download the PNG, but when I want to download the SVG, it crashes with Unhandled clojure.lang.ExceptionInfo 'nextjournal.clerk/show!' cannot show 'nil'. {:file-or-ns nil}
Any idea what could be causing that?
Zach 2024-10-02T17:56:33.835889Z
Is it possible to disable caching on all forms in a notebook?
mkvlr 2024-10-03T07:13:57.942519Z
add it to the ns metadata:
(ns foo
{:nextjournal.clerk/no-cache true})mkvlr 2024-10-02T18:06:48.504959Z
yes, add no cache to the namespace metadata
Zach 2024-10-03T05:27:05.251949Z
Hmm I've tried the following but no luck
^{:nextjournal.clerk/no-cache true
:nextjournal.clerk/visibility {:result :hide}}
(ns ...) Zach 2024-10-03T05:32:36.140389Z
But, it does work when I add that map entry to each individual forms metadata