That error message is coming from some use of (case), usually in your code but conceivably from somewhere in Clojure. It tries to do some clever bit-fiddling to generate a constant-time-dispatch on the hashcodes of its clauses, and if that fails it throws a compiler error (arguably it could degrade into to a cond, but it doesn't).
Given that you don't use case at all, and the backtrace suggests the case call is in dispatching for the protocol, it sounds to me like a bug in the protocol dispatcher. The "interesting" exception usually comes after the last "caused by" message, and the first few frames are the ones that actually caused the issue. So here's yours: Caused by: java.lang.IllegalArgumentException: No distinct mapping found at clojure.core$min_hash.invoke (core.clj:5270) clojure.core$expand_method_impl_cache.invoke (core_deftype.clj: 403) clojure.core$_cache_protocol_fn.invoke (core_deftype.clj:472) funql.core$eval293$fn__294$G__284__309.invoke (core.clj:408) funql.core$eval324$fn__325$fn__328.invoke (core.clj:432) clojure.lang.LazySeq.sval (LazySeq.java:42) clojure.lang.LazySeq.seq (LazySeq.java:63) clojure.lang.RT.seq (RT.java:450) clojure.core$seq.invoke (core.clj:122) So line 432 calls iseq, and the macroexpansion of your code at line 408 calls into some kind of internal protocol-dispatch-cache, which tries to do a minhash in order to figure out how to switch through a case block, which barfs. On Mar 25, 5:15 pm, Tassilo Horn <tass...@member.fsf.org> wrote: > Hi all, > > in my graph querying library, I had several defmultis that simply > dispatched on the class of the first argument. The guys on #clojure > suggested using protocols instead to get a better performance. So I > did, and basically it works fine and seems to be a bit faster than > before. > > However, when running my tests (lein test) I get errors. Most of the > time my coupling-by-objects test errors, but sometimes it's another > test. And some other times, all tests pass without error. (The same > applies for running the tests at the REPL, or simply executing the forms > contained in my tests.) > > A complete backtrace is below. I have no clue what it should tell me. > I checked all the shown line numbers in my own code (funql), but I > cannot see how these places might produce an error. > > I switched off AOT, deleted all compiled class files, but that doesn't > change anything. I run clojure 1.2.0. I've tried the current 1.3.0 > master snapshot, but that fails exactly the same. > > If someone wants to try it out for himself, you can clone my mercurial > repository: > > $ hg clonehttps://anonymous:sec...@hg.uni-koblenz.de/horn/funql > $ lein deps > $ lein test > > Any pointers are highly welcome. I owe a beer to whoever finds the bug > or gives me a pointer that helps finding it! > > Bye, > Tassilo, who stared the last 3 hours at the code without any luck... > > ERROR in (test-reachable-vertices) (LazySeq.java:47) > expected: (= 6117 (count (p-apply (vertex (jg) 12) [p-* <->]))) > actual: java.lang.RuntimeException: java.lang.RuntimeException: > java.lang.RuntimeException: java.lang.IllegalArgumentException: No distinct > mapping found > at clojure.lang.LazySeq.sval (LazySeq.java:47) > clojure.lang.LazySeq.seq (LazySeq.java:56) > clojure.lang.ChunkedCons.chunkedNext (ChunkedCons.java:59) > clojure.core$chunk_next.invoke (core.clj:582) > clojure.core$r.invoke (core.clj:798) > clojure.core$into.invoke (core.clj:2615) > funql.core$into_oset.doInvoke (core.clj:81) > clojure.lang.RestFn.applyTo (RestFn.java:140) > clojure.core$apply.invoke (core.clj:540) > funql.core$___.invoke (core.clj:476) > funql.core$_LT___GT_.invoke (core.clj:527) > funql.core$_LT___GT_.invoke (core.clj:523) > funql.core$p_apply.invoke (core.clj:453) > funql.core$p__PLUS_.invoke (core.clj:601) > funql.core$p__STAR_.invoke (core.clj:616) > clojure.lang.AFn.applyToHelper (AFn.java:165) > clojure.lang.AFn.applyTo (AFn.java:151) > clojure.core$apply.invoke (core.clj:542) > funql.core$p_apply.invoke (core.clj:455) > funql.test.core$fn__792$fn__805.invoke (core.clj:263) > funql.test.core/fn (core.clj:263) > clojure.test$test_var$fn__6131.invoke (test.clj:688) > clojure.test$test_var.invoke (test.clj:688) > clojure.test$test_all_vars$fn__6135$fn__6142.invoke (test.clj:704) > clojure.test$default_fixture.invoke (test.clj:658) > clojure.test$test_all_vars$fn__6135.invoke (test.clj:704) > clojure.test$default_fixture.invoke (test.clj:658) > clojure.test$test_all_vars.invoke (test.clj:700) > clojure.test$test_ns.invoke (test.clj:723) > clojure.core$map$fn__3695.invoke (core.clj:2096) > clojure.lang.LazySeq.sval (LazySeq.java:42) > clojure.lang.LazySeq.seq (LazySeq.java:56) > clojure.lang.Cons.next (Cons.java:39) > clojure.lang.RT.boundedLength (RT.java:1186) > clojure.lang.RestFn.applyTo (RestFn.java:131) > clojure.core$apply.invoke (core.clj:542) > clojure.test$run_tests.doInvoke (test.clj:738) > clojure.lang.RestFn.applyTo (RestFn.java:138) > clojure.core$apply.invoke (core.clj:540) > user$eval1350$fn__1351.invoke (NO_SOURCE_FILE:1) > user$eval1350.invoke (NO_SOURCE_FILE:1) > clojure.lang.Compiler.eval (Compiler.java:5424) > clojure.lang.Compiler.eval (Compiler.java:5415) > clojure.lang.Compiler.eval (Compiler.java:5415) > clojure.lang.Compiler.eval (Compiler.java:5391) > clojure.core$eval.invoke (core.clj:2382) > clojure.main$eval_opt.invoke (main.clj:235) > clojure.main$initialize.invoke (main.clj:254) > clojure.main$null_opt.invoke (main.clj:279) > clojure.main$main.doInvoke (main.clj:354) > clojure.lang.RestFn.invoke (RestFn.java:422) > clojure.lang.Var.invoke (Var.java:369) > clojure.lang.AFn.applyToHelper (AFn.java:165) > clojure.lang.Var.applyTo (Var.java:482) > clojure.main.main (main.java:37) > Caused by: java.lang.RuntimeException: java.lang.RuntimeException: > java.lang.IllegalArgumentException: No distinct mapping found > at clojure.lang.LazySeq.sval (LazySeq.java:47) > clojure.lang.LazySeq.seq (LazySeq.java:56) > clojure.lang.RT.seq (RT.java:450) > clojure.core$seq.invoke (core.clj:122) > clojure.core$map$fn__3695.invoke (core.clj:2088) > clojure.lang.LazySeq.sval (LazySeq.java:42) > clojure.lang.LazySeq.seq (LazySeq.java:56) > clojure.lang.ChunkedCons.chunkedNext (ChunkedCons.java:59) > clojure.core$chunk_next.invoke (core.clj:582) > clojure.core$r.invoke (core.clj:798) > clojure.core$into.invoke (core.clj:2615) > funql.core$into_oset.doInvoke (core.clj:81) > clojure.lang.RestFn.applyTo (RestFn.java:140) > clojure.core$apply.invoke (core.clj:540) > funql.core$___.invoke (core.clj:476) > funql.core$_LT___GT_.invoke (core.clj:527) > funql.core$_LT___GT_.invoke (core.clj:523) > funql.core$p_apply.invoke (core.clj:453) > funql.core$p__PLUS_.invoke (core.clj:601) > funql.core$p__STAR_.invoke (core.clj:616) > clojure.lang.AFn.applyToHelper (AFn.java:165) > clojure.lang.AFn.applyTo (AFn.java:151) > clojure.core$apply.invoke (core.clj:542) > funql.core$p_apply.invoke (core.clj:455) > funql.test.core$fn__792$fn__805.invoke (core.clj:263) > funql.test.core/fn (core.clj:263) > clojure.test$test_var$fn__6131.invoke (test.clj:688) > clojure.test$test_var.invoke (test.clj:688) > clojure.test$test_all_vars$fn__6135$fn__6142.invoke (test.clj:704) > clojure.test$default_fixture.invoke (test.clj:658) > clojure.test$test_all_vars$fn__6135.invoke (test.clj:704) > clojure.test$default_fixture.invoke (test.clj:658) > clojure.test$test_all_vars.invoke (test.clj:700) > clojure.test$test_ns.invoke (test.clj:723) > clojure.core$map$fn__3695.invoke (core.clj:2096) > clojure.lang.LazySeq.sval (LazySeq.java:42) > clojure.lang.LazySeq.seq (LazySeq.java:56) > clojure.lang.Cons.next (Cons.java:39) > clojure.lang.RT.boundedLength (RT.java:1186) > clojure.lang.RestFn.applyTo (RestFn.java:131) > clojure.core$apply.invoke (core.clj:542) > clojure.test$run_tests.doInvoke (test.clj:738) > clojure.lang.RestFn.applyTo (RestFn.java:138) > clojure.core$apply.invoke (core.clj:540) > user$eval1350$fn__1351.invoke (NO_SOURCE_FILE:1) > user$eval1350.invoke (NO_SOURCE_FILE:1) > clojure.lang.Compiler.eval (Compiler.java:5424) > clojure.lang.Compiler.eval (Compiler.java:5415) > clojure.lang.Compiler.eval (Compiler.java:5415) > clojure.lang.Compiler.eval (Compiler.java:5391) > clojure.core$eval.invoke (core.clj:2382) > clojure.main$eval_opt.invoke (main.clj:235) > clojure.main$initialize.invoke (main.clj:254) > clojure.main$null_opt.invoke (main.clj:279) > clojure.main$main.doInvoke (main.clj:354) > clojure.lang.RestFn.invoke (RestFn.java:422) > clojure.lang.Var.invoke (Var.java:369) > clojure.lang.AFn.applyToHelper (AFn.java:165) > clojure.lang.Var.applyTo (Var.java:482) > clojure.main.main (main.java:37) > Caused by: java.lang.RuntimeException: java.lang.IllegalArgumentException: No > distinct mapping found > at clojure.lang.LazySeq.sval (LazySeq.java:47) > clojure.lang.LazySeq.seq (LazySeq.java:63) > clojure.lang.RT.seq (RT.java:450) > clojure.core$seq.invoke (core.clj:122) > clojure.core$filter$fn__3714.invoke (core.clj:2130) > clojure.lang.LazySeq.sval (LazySeq.java:42) > clojure.lang.LazySeq.seq (LazySeq.java:56) > clojure.lang.RT.seq (RT.java:450) > clojure.core$seq.invoke (core.clj:122) > clojure.core$map$fn__3695.invoke (core.clj:2088) > clojure.lang.LazySeq.sval (LazySeq.java:42) > clojure.lang.LazySeq.seq (LazySeq.java:56) > clojure.lang.ChunkedCons.chunkedNext (ChunkedCons.java:59) > clojure.core$chunk_next.invoke (core.clj:582) > clojure.core$r.invoke (core.clj:798) > clojure.core$into.invoke (core.clj:2615) > funql.core$into_oset.doInvoke (core.clj:81) > clojure.lang.RestFn.applyTo (RestFn.java:140) > clojure.core$apply.invoke (core.clj:540) > funql.core$___.invoke (core.clj:476) > funql.core$_LT___GT_.invoke (core.clj:527) > funql.core$_LT___GT_.invoke (core.clj:523) > funql.core$p_apply.invoke (core.clj:453) > funql.core$p__PLUS_.invoke (core.clj:601) > funql.core$p__STAR_.invoke (core.clj:616) > clojure.lang.AFn.applyToHelper (AFn.java:165) > clojure.lang.AFn.applyTo (AFn.java:151) > clojure.core$apply.invoke (core.clj:542) > funql.core$p_apply.invoke (core.clj:455) > funql.test.core$fn__792$fn__805.invoke (core.clj:263) > funql.test.core/fn (core.clj:263) > clojure.test$test_var$fn__6131.invoke (test.clj:688) > clojure.test$test_var.invoke (test.clj:688) > clojure.test$test_all_vars$fn__6135$fn__6142.invoke (test.clj:704) > clojure.test$default_fixture.invoke (test.clj:658) > clojure.test$test_all_vars$fn__6135.invoke (test.clj:704) > clojure.test$default_fixture.invoke (test.clj:658) > clojure.test$test_all_vars.invoke (test.clj:700) > clojure.test$test_ns.invoke (test.clj:723) > clojure.core$map$fn__3695.invoke (core.clj:2096) > clojure.lang.LazySeq.sval (LazySeq.java:42) > clojure.lang.LazySeq.seq (LazySeq.java:56) > clojure.lang.Cons.next (Cons.java:39) > clojure.lang.RT.boundedLength (RT.java:1186) > clojure.lang.RestFn.applyTo (RestFn.java:131) > clojure.core$apply.invoke (core.clj:542) > clojure.test$run_tests.doInvoke (test.clj:738) > clojure.lang.RestFn.applyTo (RestFn.java:138) > clojure.core$apply.invoke (core.clj:540) > user$eval1350$fn__1351.invoke (NO_SOURCE_FILE:1) > user$eval1350.invoke (NO_SOURCE_FILE:1) > clojure.lang.Compiler.eval (Compiler.java:5424) > clojure.lang.Compiler.eval (Compiler.java:5415) > clojure.lang.Compiler.eval (Compiler.java:5415) > clojure.lang.Compiler.eval (Compiler.java:5391) > clojure.core$eval.invoke (core.clj:2382) > clojure.main$eval_opt.invoke (main.clj:235) > clojure.main$initialize.invoke (main.clj:254) > clojure.main$null_opt.invoke (main.clj:279) > clojure.main$main.doInvoke (main.clj:354) > clojure.lang.RestFn.invoke (RestFn.java:422) > clojure.lang.Var.invoke (Var.java:369) > clojure.lang.AFn.applyToHelper (AFn.java:165) > clojure.lang.Var.applyTo (Var.java:482) > clojure.main.main (main.java:37) > Caused by: java.lang.IllegalArgumentException: No distinct mapping found > at clojure.core$min_hash.invoke (core.clj:5270) > clojure.core$expand_method_impl_cache.invoke (core_deftype.clj:403) > clojure.core$_cache_protocol_fn.invoke (core_deftype.clj:472) > funql.core$eval293$fn__294$G__284__309.invoke (core.clj:408) > funql.core$eval324$fn__325$fn__328.invoke (core.clj:432) > clojure.lang.LazySeq.sval (LazySeq.java:42) > clojure.lang.LazySeq.seq (LazySeq.java:63) > clojure.lang.RT.seq (RT.java:450) > clojure.core$seq.invoke (core.clj:122) > clojure.core$filter$fn__3714.invoke (core.clj:2130) > clojure.lang.LazySeq.sval (LazySeq.java:42) > clojure.lang.LazySeq.seq (LazySeq.java:56) > clojure.lang.RT.seq (RT.java:450) > clojure.core$seq.invoke (core.clj:122) > clojure.core$map$fn__3695.invoke (core.clj:2088) > clojure.lang.LazySeq.sval (LazySeq.java:42) > clojure.lang.LazySeq.seq (LazySeq.java:56) > clojure.lang.ChunkedCons.chunkedNext (ChunkedCons.java:59) > clojure.core$chunk_next.invoke (core.clj:582) > clojure.core$r.invoke (core.clj:798) > clojure.core$into.invoke (core.clj:2615) > funql.core$into_oset.doInvoke (core.clj:81) > clojure.lang.RestFn.applyTo (RestFn.java:140) > clojure.core$apply.invoke (core.clj:540) > funql.core$___.invoke (core.clj:476) > funql.core$_LT___GT_.invoke (core.clj:527) > funql.core$_LT___GT_.invoke (core.clj:523) > funql.core$p_apply.invoke (core.clj:453) > funql.core$p__PLUS_.invoke (core.clj:601) > funql.core$p__STAR_.invoke (core.clj:616) > clojure.lang.AFn.applyToHelper (AFn.java:165) > clojure.lang.AFn.applyTo (AFn.java:151) > clojure.core$apply.invoke (core.clj:542) > funql.core$p_apply.invoke (core.clj:455) > funql.test.core$fn__792$fn__805.invoke (core.clj:263) > funql.test.core/fn (core.clj:263) > clojure.test$test_var$fn__6131.invoke (test.clj:688) > clojure.test$test_var.invoke (test.clj:688) > clojure.test$test_all_vars$fn__6135$fn__6142.invoke (test.clj:704) > clojure.test$default_fixture.invoke (test.clj:658) > clojure.test$test_all_vars$fn__6135.invoke (test.clj:704) > clojure.test$default_fixture.invoke (test.clj:658) > clojure.test$test_all_vars.invoke (test.clj:700) > clojure.test$test_ns.invoke (test.clj:723) > clojure.core$map$fn__3695.invoke (core.clj:2096) > clojure.lang.LazySeq.sval (LazySeq.java:42) > clojure.lang.LazySeq.seq (LazySeq.java:56) > clojure.lang.Cons.next (Cons.java:39) > clojure.lang.RT.boundedLength (RT.java:1186) > clojure.lang.RestFn.applyTo (RestFn.java:131) > clojure.core$apply.invoke (core.clj:542) > clojure.test$run_tests.doInvoke (test.clj:738) > clojure.lang.RestFn.applyTo (RestFn.java:138) > clojure.core$apply.invoke (core.clj:540) > user$eval1350$fn__1351.invoke (NO_SOURCE_FILE:1) > user$eval1350.invoke (NO_SOURCE_FILE:1) > clojure.lang.Compiler.eval (Compiler.java:5424) > clojure.lang.Compiler.eval (Compiler.java:5415) > clojure.lang.Compiler.eval (Compiler.java:5415) > clojure.lang.Compiler.eval (Compiler.java:5391) > clojure.core$eval.invoke (core.clj:2382) > clojure.main$eval_opt.invoke (main.clj:235) > clojure.main$initialize.invoke (main.clj:254) > clojure.main$null_opt.invoke (main.clj:279) > clojure.main$main.doInvoke (main.clj:354) > clojure.lang.RestFn.invoke (RestFn.java:422) > clojure.lang.Var.invoke (Var.java:369) > clojure.lang.AFn.applyToHelper (AFn.java:165) > clojure.lang.Var.applyTo (Var.java:482) > clojure.main.main (main.java:37) -- You received this message because you are subscribed to the Google Groups "Clojure" group. 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