Exception with levenshtein-distance for small strings

[gudesh]

That kind of call (strings of 1 to 3 chars long) fail:

(levenshtein-distance "a" "abc")

with such a stack.

Wrong number of args (0) passed to: core$max
[Thrown class clojure.lang.ArityException]

Restarts:
0: [QUIT] Quit to the SLIME top level

Backtrace:
0: clojure.lang.AFn.throwArity(AFn.java:437)
1: clojure.lang.RestFn.invoke(RestFn.java:399)
2: clojure.lang.AFn.applyToHelper(AFn.java:159)
3: clojure.lang.RestFn.applyTo(RestFn.java:132)
4: clojure.core$apply.invoke(core.clj:600)
5: clj_diff.core$levenshtein_distance.invoke(core.clj:98)
6: clj_diff.core$levenshtein_distance.invoke(core.clj:91)
7: levenshtein1.core$eval1946.invoke(NO_SOURCE_FILE:1)
8: clojure.lang.Compiler.eval(Compiler.java:6465)
9: clojure.lang.Compiler.eval(Compiler.java:6431)
10: clojure.core$eval.invoke(core.clj:2795)
11: swank.commands.basic$eval_region.invoke(basic.clj:47)
12: swank.commands.basic$eval_region.invoke(basic.clj:37)
13: swank.commands.basic$eval768$interactive_eval__769.invoke(basic.clj:66)
14: clojure.lang.Var.invoke(Var.java:401)
15: levenshtein1.core$eval1944.invoke(NO_SOURCE_FILE)
16: clojure.lang.Compiler.eval(Compiler.java:6465)
17: clojure.lang.Compiler.eval(Compiler.java:6431)
18: clojure.core$eval.invoke(core.clj:2795)
19: swank.core$eval_in_emacs_package.invoke(core.clj:92)
20: swank.core$eval_for_emacs.invoke(core.clj:239)
21: clojure.lang.Var.invoke(Var.java:409)
22: clojure.lang.AFn.applyToHelper(AFn.java:167)
23: clojure.lang.Var.applyTo(Var.java:518)
24: clojure.core$apply.invoke(core.clj:600)
25: swank.core$eval_from_control.invoke(core.clj:99)
26: swank.core$spawn_worker_thread$fn__501$fn__502.invoke(core.clj:298)
27: clojure.lang.AFn.applyToHelper(AFn.java:159)
28: clojure.lang.AFn.applyTo(AFn.java:151)
29: clojure.core$apply.invoke(core.clj:600)
30: swank.core$spawn_worker_thread$fn__501.doInvoke(core.clj:294)
31: clojure.lang.RestFn.invoke(RestFn.java:397)
32: clojure.lang.AFn.run(AFn.java:24)
33: java.lang.Thread.run(Thread.java:636)

I'm sorry but I could not dig further into the code to find an explanation.

(diff ...) works well, (edit-distance ...) too, it's just (levenshtein-distance...).

Notice: the error was reproducible on a Windows and Linux installation, thus not depending on a single weird installation...

[gudesh]

Hi again,

I managed to clone your project and compile it (after shunting some project.clj lines...).

It works all right, compile and tests, with clojure 1.2.0.

Yet, with clojure 1.3.0, I get a compile error:

---

cd /home/manou/BIN/CLOJURE/EXAMPLES/clj-diff/src/clj/clj_diff/
2 compiler notes:

Unknown location:
error: java.lang.RuntimeException: java.lang.ClassNotFoundException: clj_diff.FastStringOps

Unknown location:
error: java.lang.ClassNotFoundException: clj_diff.FastStringOps

Compilation failed.

---

I suggest you test the jar from clojars in a separate project. It might help reproducing the error...

[gudesh]

After compiling on clojure 1.2.0 and using my jar (instead of clojar's one), it works, even within a clojure 1.3.0 project...

For information, this is the project.clj I used to get it compiled:

---

(defproject clj-diff "1.0.0-SNAPSHOT"
:description "Sequential diff in Clojure."
:url "http://github.com/brentonashworth/clj-diff"
:source-path "src/clj"
:java-source-path "src/jvm"
:java-fork "true"
:java-debug "true"
;; :hooks [leiningen.hooks.javac
;; leiningen.hooks.difftest]
:dev-dependencies [[org.clojure/clojure "1.2.0"]
;; [lein-javac "1.2.1-SNAPSHOT"]
[marginalia "0.5.0"]
[lein-difftest "1.3.2-SNAPSHOT"]])

---

I hope this helps...