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[CLJS-784] PersistHashMap's -conj implementation recurses infinitely if element to be conjed is not a vector. Created: 15/Mar/14  Updated: 15/Mar/14

Status: Open
Project: ClojureScript
Component/s: None
Affects Version/s: None
Fix Version/s: None

Type: Defect Priority: Minor
Reporter: Alex Coventry Assignee: Unassigned
Resolution: Unresolved Votes: 0
Labels: errormsgs
Environment:

Happens on cljsfiddle, among other environments.



 Description   

In commit b8681e8 the implementation is

ICollection
(-conj [coll entry]
(if (vector? entry)
(-assoc coll (-nth entry 0) (-nth entry 1))
(reduce -conj coll entry)))

Thus, e.g., (-conj {} "foo") results in an infinite recursion, and a stack overflow. This causes things like (merge {} "foo") to fail for the same reason.

Not sure what the purpose of the not-vector branch could be. I can't think of a situation where it would give a useful result. Maybe it could throw a more helpful error message.






[CLJS-783] Confusing error messages when ns compilation fails due to a missing dependency Created: 11/Mar/14  Updated: 17/Apr/14  Resolved: 17/Apr/14

Status: Closed
Project: ClojureScript
Component/s: None
Affects Version/s: None
Fix Version/s: None

Type: Defect Priority: Minor
Reporter: Michael Klishin Assignee: Unassigned
Resolution: Declined Votes: 0
Labels: error-reporting, errormsgs, usability


 Description   

I have a namespace proj.a which requires proj.b. proj.b, in turn, relies on core.async. I did not have
core.async listed in project.clj by accident, and the resulting error message was

goog.require could not find: proj.b.

This is not incredibly helpful. I've wasted over an hour trying to understand why one ns in my project
cannot reference another one.

Expected outcome: compilation must fail instead of swallowing exceptions. If it matters, I use lein-cljsbuild 1.0.2.



 Comments   
Comment by David Nolen [ 12/Mar/14 8:36 AM ]

And which version of ClojureScript are you using?

Comment by Michael Klishin [ 12/Mar/14 8:52 AM ]

0.0-2138

Comment by Michael Klishin [ 12/Mar/14 8:53 AM ]

I strongly disagree with the severity change. Anything that can waste beginners hours of time is not a minor priority.

Comment by David Nolen [ 12/Mar/14 10:18 AM ]

That is a fairly old release of ClojureScript, can you replicate the issue with 0.0-2173? When you change your dependency please make sure to run "lein cljsbuild clean" first.

Comment by David Nolen [ 17/Apr/14 3:53 PM ]

Closing unless I hear step on how to reproduce this in more recent ClojureScript releases. Feel free to request a re-open if you can demonstrate that this isn't resolved.





[CLJS-685] Cannot call method 'fromArray' of undefined -- Clojurescript 0.0-2030 Created: 17/Nov/13  Updated: 26/Nov/13  Resolved: 22/Nov/13

Status: Closed
Project: ClojureScript
Component/s: None
Affects Version/s: None
Fix Version/s: None

Type: Defect Priority: Minor
Reporter: John Chijioke Assignee: Unassigned
Resolution: Completed Votes: 0
Labels: Compiler, bug, errormsgs
Environment:

Linux 3.2.0-52-generic x86_64 GNU/Linux, java 1.7, clojure 1.5.1



 Description   

Clojurescript 0.0-2030

This line from compile cljs.core is causing problems:

cljs.core.PersistentQueue.EMPTY = (new cljs.core.PersistentQueue(null, 0, null, cljs.core.with_meta(cljs.core.PersistentVector.EMPTY, cljs.core.PersistentArrayMap.fromArray([new cljs.core.Keyword(null, "end-line", "end-line", 2693041432), 3820, new cljs.core.Keyword(null, "end-column", "end-column", 3799845882), 69], true)), 0));

error message: Uncaught TypeError: Cannot call method 'fromArray' of undefined.

That's the first mention of fromArray in that file. I don't know if it's an ordering problem.



 Comments   
Comment by John Chijioke [ 17/Nov/13 11:10 PM ]

I solved it by replacing [] with cljs.core.PersistentVector.EMPTY. I think this must be a reader problem.

Comment by David Nolen [ 17/Nov/13 11:32 PM ]

This ticket needs more details, how can this error be reproduced?

Comment by Peter Taoussanis [ 22/Nov/13 3:03 AM ]

Hi, I'm seeing the same problem with tools.reader 0.8.0.

Any Clojurescript file (even an empty file) will produce the error.

Clojure: 1.6.0-alpha2
Clojurescript: 0.0-2030
Cljsbuild: 1.0.0
tools.reader: 0.8.0

Tried `lein cljsbuild clean`.

Problem is resolved by dropping back to tools.reader 0.7.10.

Update: have created an issue on the tools.reader GitHub page: https://github.com/clojure/tools.reader/issues/7

Update 2: this isn't something specific to Cljs 0.0-2030 btw, tools.reader 0.8.0 seems to produce the same error against at least Cljs 0.0-2060, 0.0-2027, 0.0-2024.

Comment by Nicola Mometto [ 22/Nov/13 6:49 AM ]

tools.reader 0.8.0 introduces end-column/end-line metadata, this needs to be elided as per line/column to avoid this bootstrapping issue.

Comment by David Nolen [ 22/Nov/13 8:02 AM ]

fixed, http://github.com/clojure/clojurescript/commit/36d401797f85c99794eef8a71239641930c36871

Comment by Peter Taoussanis [ 22/Nov/13 10:30 AM ]

Thanks a lot David, Nicola - much appreciated! Cheers

Comment by John Chijioke [ 26/Nov/13 6:32 AM ]

Thanks David. Cheers!





[CLJS-639] Produce errors when records are initialized incorrectly Created: 27/Oct/13  Updated: 19/Nov/13  Resolved: 19/Nov/13

Status: Closed
Project: ClojureScript
Component/s: None
Affects Version/s: None
Fix Version/s: None

Type: Enhancement Priority: Minor
Reporter: Scott Feeney Assignee: Unassigned
Resolution: Completed Votes: 0
Labels: defrecord, errormsgs


 Description   

There are a couple of wrong ways you can use a record initializer that don't produce errors in ClojureScript, just nils:

ClojureScript:cljs.user> (defrecord Thing [foo bar])
cljs.user/Thing
ClojureScript:cljs.user> (Thing. 1 2)  ; correct usage
#cljs.user.Thing{:foo 1, :bar 2}
ClojureScript:cljs.user> (Thing. 1)    ; wrong number of fields
#cljs.user.Thing{:foo 1, :bar nil}
ClojureScript:cljs.user> (Thing 1 2)   ; forgetting the dot
nil

Compare Clojure:

user=> (defrecord Thing [foo bar])
user.Thing
user=> (Thing. 1 2)
#user.Thing{:foo 1, :bar 2}
user=> (Thing. 1)

CompilerException java.lang.IllegalArgumentException: No matching ctor found for class user.Thing, compiling:(/tmp/form-init7089728177345913731.clj:1:1) 
user=> (Thing 1 2)

RuntimeException Expecting var, but Thing is mapped to class user.Thing  clojure.lang.Util.runtimeException (Util.java:219)

It would make debugging easier if ClojureScript followed Clojure's example here and gave a useful error immediately in case of the last 2 examples.



 Comments   
Comment by David Nolen [ 29/Oct/13 6:40 PM ]

Thanks for the report, these warnings would indeed be nice.

Comment by David Nolen [ 19/Nov/13 4:41 PM ]

fixed, http://github.com/clojure/clojurescript/commit/8c6dd2468a3913e316d021fc0b09745bd3ac7dcd

Comment by David Nolen [ 19/Nov/13 4:43 PM ]

Wrong arity constructor issue fixed. Separate ticket need for invoking ClojureScript ctors as functions.





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