Re: Useless Java error messages
On Tuesday, September 2, 2014 5:13:49 PM UTC-7, Beau Fabry wrote: apologies, not a leiningen plugin. https://github.com/AvisoNovate/pretty Thank you. This looks most interesting. I was able to find clj-pretty-error on Clojars; github is https://github.com/liquidz/clj-pretty-error, but it appears not to have any updates in the past couple of years. On Wednesday, September 3, 2014 2:17:21 AM UTC+10, John Gabriele wrote: On Monday, September 1, 2014 7:24:54 PM UTC-4, Beau Fabry wrote: The pretty-errors leiningen plugin might be worth a look Hm... I don't see that particular plug-in in the [main lein plug-in list]( https://github.com/technomancy/leiningen/wiki/Plugins). Do you mean [clj-stacktrace](https://github.com/mmcgrana/clj-stacktrace)? (not a lein plug-in) -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Useless Java error messages
On Monday, September 1, 2014 7:24:54 PM UTC-4, Beau Fabry wrote: The pretty-errors leiningen plugin might be worth a look Hm... I don't see that particular plug-in in the [main lein plug-in list](https://github.com/technomancy/leiningen/wiki/Plugins). Do you mean [clj-stacktrace](https://github.com/mmcgrana/clj-stacktrace)? (not a lein plug-in) -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Useless Java error messages
apologies, not a leiningen plugin. https://github.com/AvisoNovate/pretty On Wednesday, September 3, 2014 2:17:21 AM UTC+10, John Gabriele wrote: On Monday, September 1, 2014 7:24:54 PM UTC-4, Beau Fabry wrote: The pretty-errors leiningen plugin might be worth a look Hm... I don't see that particular plug-in in the [main lein plug-in list]( https://github.com/technomancy/leiningen/wiki/Plugins). Do you mean [clj-stacktrace](https://github.com/mmcgrana/clj-stacktrace)? (not a lein plug-in) -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Useless Java error messages
Where do you see a Java error here ? I see the Clojure implementation reporting that you are trying to apply a numeric operator to a null/nil value :) I agree the JVM stack traces are not nice and polluted by all the frames which may/may not be relevant. The messages are not always as clear as this one either. You do not have any source file line number anywhere in the stack trace pointing to your code ? Luc P. Compiling a file in Emacs, this error: NullPointerException clojure.lang.Numbers.ops (Numbers.java:961) . leaves me clueless as to where the error occurred. Is there hope for native Clojure debugging anytime soon as this is the kind of thing which can easily drive a non-Java user like me to distraction? I noticed the Elixir community had the same problem with Erlang's cryptic error messages and produced their own error logging to make the language attractive to non-Erlangers. This seems to me to be perhaps the biggest barrier to entry with hosted languages. We can't expect everyone coming to Clojure to master Java's less-than-helpful error messages. Many will just give up. gvim -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- Luc Prefontainelprefonta...@softaddicts.ca sent by ibisMail! -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Useless Java error messages
On 01/09/2014 17:50, Luc Prefontaine wrote: Where do you see a Java error here ? I see the Clojure implementation reporting that you are trying to apply a numeric operator to a null/nil value :) I agree the JVM stack traces are not nice and polluted by all the frames which may/may not be relevant. The messages are not always as clear as this one either. You do not have any source file line number anywhere in the stack trace pointing to your code ? Luc P. Sorry, I was a bit trigger-happy with this one. Turns out it was Emacs cider truncating the stack trace to a single line. Someone on IRC pointed me to `(pst)` within Emacs cider which displays the full stack trace. gvim -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Useless Java error messages
Ah ! Emacs, an old friend that I should eventually revisit after 30 years... Long time no see :) Luc P. On 01/09/2014 17:50, Luc Prefontaine wrote: Where do you see a Java error here ? I see the Clojure implementation reporting that you are trying to apply a numeric operator to a null/nil value :) I agree the JVM stack traces are not nice and polluted by all the frames which may/may not be relevant. The messages are not always as clear as this one either. You do not have any source file line number anywhere in the stack trace pointing to your code ? Luc P. Sorry, I was a bit trigger-happy with this one. Turns out it was Emacs cider truncating the stack trace to a single line. Someone on IRC pointed me to `(pst)` within Emacs cider which displays the full stack trace. gvim -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- Softaddictslprefonta...@softaddicts.ca sent by ibisMail from my ipad! -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Useless Java error messages
The pretty-errors leiningen plugin might be worth a look On Tuesday, September 2, 2014 7:58:31 AM UTC+10, g vim wrote: On 01/09/2014 17:50, Luc Prefontaine wrote: Where do you see a Java error here ? I see the Clojure implementation reporting that you are trying to apply a numeric operator to a null/nil value :) I agree the JVM stack traces are not nice and polluted by all the frames which may/may not be relevant. The messages are not always as clear as this one either. You do not have any source file line number anywhere in the stack trace pointing to your code ? Luc P. Sorry, I was a bit trigger-happy with this one. Turns out it was Emacs cider truncating the stack trace to a single line. Someone on IRC pointed me to `(pst)` within Emacs cider which displays the full stack trace. gvim -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Useless Java error messages
Looks like you figured this out, but sharing in case it helps others. It turns out the JVM actually has a special caching mechanism for making NullPointerExceptions fast (and near-impossible to debug): http://stackoverflow.com/a/3010106 This link also has a JVM opt to stop this optimization, and mentions that you always get the full stack trace *once* before it's optimized away. On Monday, September 1, 2014 7:11:00 AM UTC-7, g vim wrote: Compiling a file in Emacs, this error: NullPointerException clojure.lang.Numbers.ops (Numbers.java:961) . leaves me clueless as to where the error occurred. Is there hope for native Clojure debugging anytime soon as this is the kind of thing which can easily drive a non-Java user like me to distraction? I noticed the Elixir community had the same problem with Erlang's cryptic error messages and produced their own error logging to make the language attractive to non-Erlangers. This seems to me to be perhaps the biggest barrier to entry with hosted languages. We can't expect everyone coming to Clojure to master Java's less-than-helpful error messages. Many will just give up. gvim -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
