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bhauman / lein-figwheel

Figwheel builds your ClojureScript code and hot loads it into the browser as you are coding!
Eclipse Public License 1.0
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Send JS exception stack traces through piggieback #563

Open cjhowedev opened 7 years ago

cjhowedev commented 7 years ago

With the latest piggieback (0.2.2) and cider-nrepl, causing an exception in a piggieback REPL will send the exception back to cider to show it in the stack trace window. You can cause these errors in figwheel by typing some invalid syntax, like #fail, which will pop up the stack trace window. However, normal Javascript errors, like (throw "fail"), don't cause a stack trace to be sent back. I'm assuming this is because it's a Javascript error and not a Clojure exception. Could we make figwheel support translating Javascript errors into Clojure exceptions with a stack trace so they can be sent through piggieback to show up in the cider stacktrace window?

EDIT:

As an example,

cljs.user> (defn whatever-man [] (let [arr [1 4]] (arr 3)))
#'cljs.user/whatever-man
cljs.user> (whatever-man)
#object[Error Error: No item 3 in vector of length 2]
Error: No item 3 in vector of length 2
    at Object.cljs$core$vector_index_out_of_bounds [as vector_index_out_of_bounds] (http://localhost:3449/js/compiled/out/cljs/core.js:18933:8)
    at Object.cljs$core$array_for [as array_for] (http://localhost:3449/js/compiled/out/cljs/core.js:18975:18)
    at cljs.core.PersistentVector.cljs$core$IIndexed$_nth$arity$2 (http://localhost:3449/js/compiled/out/cljs/core.js:19264:19)
    at cljs.core.PersistentVector.G__10745__2 (http://localhost:3449/js/compiled/out/cljs/core.js:19581:13)
    at cljs.core.PersistentVector.G__10745 [as call] (http://localhost:3449/js/compiled/out/cljs/core.js:19592:20)
    at cljs$user$whatever_man (eval at figwheel$client$utils$eval_helper (http://localhost:3449/js/compiled/out/figwheel/client/utils.js:174:8), <anonymous>:4:12)
    at eval (eval at figwheel$client$utils$eval_helper (http://localhost:3449/js/compiled/out/figwheel/client/utils.js:174:8), <anonymous>:1:249)
    at eval (eval at figwheel$client$utils$eval_helper (http://localhost:3449/js/compiled/out/figwheel/client/utils.js:174:8), <anonymous>:9:3)
    at eval (eval at figwheel$client$utils$eval_helper (http://localhost:3449/js/compiled/out/figwheel/client/utils.js:174:8), <anonymous>:14:4)
    at figwheel$client$utils$eval_helper (http://localhost:3449/js/compiled/out/figwheel/client/utils.js:174:8)
nil
cljs.user> #fail
clojure.lang.ExceptionInfo: No reader function for tag fail {:type :reader-exception, :line 1, :column 6, :file "NO_SOURCE_FILE"}
    at clojure.core$ex_info.invokeStatic(core.clj:4617)
    at clojure.core$ex_info.invoke(core.clj:4617)
    at clojure.tools.reader.reader_types$reader_error.invokeStatic(reader_types.clj:389)
    at clojure.tools.reader.reader_types$reader_error.doInvoke(reader_types.clj:385)
    at clojure.lang.RestFn.invoke(RestFn.java:439)
    at clojure.tools.reader$read_tagged.invokeStatic(reader.clj:851)
    at clojure.tools.reader$read_tagged.invoke(reader.clj:838)
    at clojure.tools.reader$read_dispatch.invokeStatic(reader.clj:71)
    at clojure.tools.reader$read_dispatch.invoke(reader.clj:66)
    at clojure.tools.reader$read_STAR_$fn__8660.invoke(reader.clj:916)
    at clojure.tools.reader.reader_types$log_source_STAR_$fn__8344.invoke(reader_types.clj:294)
    at clojure.lang.AFn.applyToHelper(AFn.java:152)
    at clojure.lang.AFn.applyTo(AFn.java:144)
    at clojure.core$apply.invokeStatic(core.clj:646)
    at clojure.core$with_bindings_STAR_.invokeStatic(core.clj:1881)
    at clojure.core$with_bindings_STAR_.doInvoke(core.clj:1881)
    at clojure.lang.RestFn.invoke(RestFn.java:425)
    at clojure.tools.reader.reader_types$log_source_STAR_.invokeStatic(reader_types.clj:293)
    at clojure.tools.reader.reader_types$log_source_STAR_.invoke(reader_types.clj:288)
    at clojure.tools.reader$read_STAR_.invokeStatic(reader.clj:905)
    at clojure.tools.reader$read_STAR_.invoke(reader.clj:897)
    at clojure.tools.reader$read.invokeStatic(reader.clj:965)
    at clojure.tools.reader$read.invoke(reader.clj:942)
    at cljs.repl$repl_read.invokeStatic(repl.cljc:107)
    at cljs.repl$repl_read.invoke(repl.cljc:86)
    at cljs.repl$repl_read.invokeStatic(repl.cljc:98)
    at cljs.repl$repl_read.invoke(repl.cljc:86)
    at cljs.repl$repl_STAR_$read_eval_print__22113$fn__22114.invoke(repl.cljc:851)
    at cljs.repl$repl_STAR_$read_eval_print__22113.invoke(repl.cljc:844)
    at cljs.repl$repl_STAR_$fn__22119$fn__22128.invoke(repl.cljc:900)
    at cljs.repl$repl_STAR_$fn__22119.invoke(repl.cljc:899)
    at cljs.compiler$with_core_cljs.invokeStatic(compiler.cljc:1180)
    at cljs.compiler$with_core_cljs.invoke(compiler.cljc:1169)
    at cljs.repl$repl_STAR_.invokeStatic(repl.cljc:861)
    at cljs.repl$repl_STAR_.invoke(repl.cljc:737)
    at cemerick.piggieback$run_cljs_repl.invokeStatic(piggieback.clj:169)
    at cemerick.piggieback$run_cljs_repl.invoke(piggieback.clj:155)
    at clojure.lang.AFn.applyToHelper(AFn.java:171)
    at clojure.lang.AFn.applyTo(AFn.java:144)
    at clojure.core$apply.invokeStatic(core.clj:650)
    at clojure.core$apply.invoke(core.clj:641)
    at cemerick.piggieback$evaluate.invokeStatic(piggieback.clj:259)
    at cemerick.piggieback$evaluate.invoke(piggieback.clj:255)
    at clojure.lang.Var.invoke(Var.java:379)
    at cemerick.piggieback$wrap_cljs_repl$fn__35364$fn__35366$fn__35367.invoke(piggieback.clj:291)
    at cemerick.piggieback$enqueue$fn__35350.invoke(piggieback.clj:247)
    at clojure.tools.nrepl.middleware.interruptible_eval$run_next$fn__30699.invoke(interruptible_eval.clj:190)
    at clojure.lang.AFn.run(AFn.java:22)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:748)

The first exception does not get sent through piggieback and forwarded to cider's stack trace display, while the second does.

bhauman commented 7 years ago

I remember trying to make this work, I forget what the show stopper was.