I don't understand what is going on here. I'm trying to throw an exception
with a cause and sometimes the cause is included in the stacktrace and
sometimes it isn't.
~$ clj -Sdeps '{:deps {org.clojure/clojure {:mvn/version "1.10.0-beta4"}}}'
Clojure 1.10.0-beta4
user=> (try (/ 1 0) (catch Exception e "caught"))
"caught"
user=> (try (/ 1 0) (catch Exception e (throw (Exception. "caught and
rethrown" e))))
Evaluation error (ArithmeticException) at clojure.lang.Numbers.divide (
Numbers.java:188).
Divide by zero
user=> (clojure.repl/pst)
ArithmeticException Divide by zero
clojure.lang.Numbers.divide (Numbers.java:188)
clojure.lang.Numbers.divide (Numbers.java:3901)
user$eval3.invokeStatic (:2)
user$eval3.invoke (:2)
clojure.lang.Compiler.eval (Compiler.java:7172)
clojure.lang.Compiler.eval (Compiler.java:7135)
clojure.core/eval (core.clj:3206)
clojure.core/eval (core.clj:3202)
clojure.main/repl/read-eval-print--8898/fn--8901 (main.clj:309)
clojure.main/repl/read-eval-print--8898 (main.clj:307)
clojure.main/repl/fn--8907 (main.clj:332)
clojure.main/repl (main.clj:332)
nil
Same behavior with Clojure 1.8 and 1.9.
If I start a REPL via lein, the cause appears:
$ lein repl
nREPL server started on port 46767 on host 127.0.0.1 - nrepl:
//127.0.0.1:46767
REPL-y 0.3.7, nREPL 0.2.12
Clojure 1.8.0
Java HotSpot(TM) 64-Bit Server VM 1.8.0_102-b14
Docs: (doc function-name-here)
(find-doc "part-of-name-here")
Source: (source function-name-here)
Javadoc: (javadoc java-object-or-class-here)
Exit: Control+D or (exit) or (quit)
Results: Stored in vars *1, *2, *3, an exception in *e
user=> (try (/ 1 0) (catch Exception e (throw (Exception. "caught and
rethrown" e))))
ArithmeticException Divide by zero clojure.lang.Numbers.divide
(Numbers.java:158)
user=> (clojure.repl/pst)
java.lang.Exception: caught and rethrown
(Unknown Source) user/eval1736
(Unknown Source) user/eval1736
Compiler.java:6927 clojure.lang.Compiler.
eval
Compiler.java:6890 clojure.lang.Compiler.
eval
core.clj:3105 clojure.core/eval
core.clj:3101 clojure.core/eval
main.clj:240 clojure.main/repl[fn]
main.clj:240 clojure.main/repl[fn]
main.clj:258 clojure.main/repl[fn]
main.clj:258 clojure.main/repl
main.clj:174 clojure.main/repl
RestFn.java:1523 clojure.lang.RestFn.
invoke
interruptible_eval.clj:87 clojure.tools.nrepl.
middleware.interruptible-eval/evaluate[fn]
AFn.java:152 clojure.lang.AFn.
applyToHelper
AFn.java:144 clojure.lang.AFn.applyTo
core.clj:646 clojure.core/apply
core.clj:1881 clojure.core/with-
bindings*
core.clj:1881 clojure.core/with-
bindings*
RestFn.java:425 clojure.lang.RestFn.
invoke
interruptible_eval.clj:85 clojure.tools.nrepl.
middleware.interruptible-eval/evaluate
interruptible_eval.clj:55 clojure.tools.nrepl.
middleware.interruptible-eval/evaluate
interruptible_eval.clj:224 clojure.tools.nrepl.
middleware.interruptible-eval/interruptible-eval[fn]
interruptible_eval.clj:192 clojure.tools.nrepl.
middleware.interruptible-eval/run-next[fn]
AFn.java:22 clojure.lang.AFn.run
ThreadPoolExecutor.java:1142 java.util.concurrent.
ThreadPoolExecutor.runWorker
ThreadPoolExecutor.java:617 java.util.concurrent.
ThreadPoolExecutor$Worker.run
Thread.java:745 java.lang.Thread.run
Caused by: java.lang.ArithmeticException: Divide by zero
Numbers.java:158 clojure.lang.Numbers.
divide
Numbers.java:3808 clojure.lang.Numbers.
divide
nil
But if I run lein repl from inside a project directory, the cause is not
included:
$ lein new test-project
Generating a project called test-project based on the 'default' template.
The default template is intended for library projects, not applications.
To see other templates (app, plugin, etc), try `lein help new`.
~$ cd test-project/
~/test-project$ lein repl
nREPL server started on port 36739 on host 127.0.0.1 - nrepl://127.0.0.1:
36739
REPL-y 0.3.7, nREPL 0.2.12
Clojure 1.8.0
Java HotSpot(TM) 64-Bit Server VM 1.8.0_102-b14
Docs: (doc function-name-here)
(find-doc "part-of-name-here")
Source: (source function-name-here)
Javadoc: (javadoc java-object-or-class-here)
Exit: Control+D or (exit) or (quit)
Results: Stored in vars *1, *2, *3, an exception in *e
user=> (try (/ 1 0) (catch Exception e (throw (Exception. "caught and
rethrown" e))))
ArithmeticException Divide by zero clojure.lang.Numbers.divide
(Numbers.java:158)
user=> (clojure.repl/pst)
ArithmeticException Divide by zero
clojure.lang.Numbers.divide (Numbers.java:158)
clojure.lang.Numbers.divide (Numbers.java:3808)
user/eval1244 (form-init6841584094920823421.clj:1)
user/eval1244 (form-init6841584094920823421.clj:1)
clojure.lang.Compiler.eval (Compiler.java:6927)
clojure.lang.Compiler.eval (Compiler.java:6890)
clojure.core/eval (core.clj:3105)
clojure.core/eval (core.clj:3101)
clojure.main/repl/read-eval-print--7408/fn--7411 (main.clj:240)
clojure.main/repl/read-eval-print--7408 (main.clj:240)
clojure.main/repl/fn--7417 (main.clj:258)
clojure.main/repl (main.clj:258)
nil
Any ideas would be appreciated.
-austin
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