这是一个典型的堆栈跟踪：
#error {
:cause "No implementation of method: :put! of protocol: #'clojure.core.async.impl.protocols/WritePort found for class: clojure.lang.PersistentArrayMap"
:via
[{:type java.lang.IllegalArgumentException
:message "No implementation of method: :put! of protocol: #'clojure.core.async.impl.protocols/WritePort found for class: clojure.lang.PersistentArrayMap"
:at [clojure.core$_cache_protocol_fn invokeStatic "core_deftype.clj" 568]}]
:trace
[[clojure.core$_cache_protocol_fn invokeStatic "core_deftype.clj" 568]
[clojure.core$_cache_protocol_fn invoke "core_deftype.clj" 560]
[clojure.core.async.impl.protocols$eval1004$fn__1005$G__995__1014 invoke "protocols.clj" 18]
[clojure.core.async$_GT__BANG__BANG_ invokeStatic "async.clj" 137]
[clojure.core.async$_GT__BANG__BANG_ invoke "async.clj" 132]
[fargish.cart$do_clockstep invokeStatic "cart.clj" 132]
[fargish.cart$do_clockstep invoke "cart.clj" 131]
[fargish.cart$run_cartnos$body__29824__auto____40594$fn__40641 invoke "cart.clj" 155]
[clojure.lang.ArrayChunk reduce "ArrayChunk.java" 58]
[clojure.core.protocols$fn__6750 invokeStatic "protocols.clj" 136]
[clojure.core.protocols$fn__6750 invoke "protocols.clj" 124]
[clojure.core.protocols$fn__6710$G__6705__6719 invoke "protocols.clj" 19]
[clojure.core.protocols$seq_reduce invokeStatic "protocols.clj" 31]
[clojure.core.protocols$fn__6738 invokeStatic "protocols.clj" 75]
[clojure.core.protocols$fn__6738 invoke "protocols.clj" 75]
[clojure.core.protocols$fn__6684$G__6679__6697 invoke "protocols.clj" 13]
[clojure.core$reduce invokeStatic "core.clj" 6545]
[clojure.core$reduce invoke "core.clj" 6527]
[fargish.cart$run_cartnos$body__29824__auto____40594 invoke "cart.clj" 155]
[fargish.cart$run_cartnos invokeStatic "cart.clj" 154]
[fargish.cart$run_cartnos invoke "cart.clj" 150]
[user$eval40833 invokeStatic "form-init6256859177727771967.clj" 1]
[user$eval40833 invoke "form-init6256859177727771967.clj" 1]
[clojure.lang.Compiler eval "Compiler.java" 6927]
[clojure.lang.Compiler eval "Compiler.java" 6890]
[clojure.core$eval invokeStatic "core.clj" 3105]
[clojure.core$eval invoke "core.clj" 3101]
[clojure.main$repl$read_eval_print__7408$fn__7411 invoke "main.clj" 240]
[clojure.main$repl$read_eval_print__7408 invoke "main.clj" 240]
[clojure.main$repl$fn__7417 invoke "main.clj" 258]
[clojure.main$repl invokeStatic "main.clj" 258]
[clojure.main$repl doInvoke "main.clj" 174]
[clojure.lang.RestFn invoke "RestFn.java" 1523]
[clojure.tools.nrepl.middleware.interruptible_eval$evaluate$fn__18913 invoke "interruptible_eval.clj" 87]
[clojure.lang.AFn applyToHelper "AFn.java" 152]
[clojure.lang.AFn applyTo "AFn.java" 144]
[clojure.core$apply invokeStatic "core.clj" 646]
[clojure.core$with_bindings_STAR_ invokeStatic "core.clj" 1881]
[clojure.core$with_bindings_STAR_ doInvoke "core.clj" 1881]
[clojure.lang.RestFn invoke "RestFn.java" 425]
[clojure.tools.nrepl.middleware.interruptible_eval$evaluate invokeStatic "interruptible_eval.clj" 85]
[clojure.tools.nrepl.middleware.interruptible_eval$evaluate invoke "interruptible_eval.clj" 55]
[clojure.tools.nrepl.middleware.interruptible_eval$interruptible_eval$fn__18958$fn__18961 invoke "interruptible_eval.clj" 222]
[clojure.tools.nrepl.middleware.interruptible_eval$run_next$fn__18953 invoke "interruptible_eval.clj" 190]
[clojure.lang.AFn run "AFn.java" 22]
[java.util.concurrent.ThreadPoolExecutor runWorker "ThreadPoolExecutor.java" 1142]
[java.util.concurrent.ThreadPoolExecutor$Worker run "ThreadPoolExecutor.java" 617]
[java.lang.Thread run "Thread.java" 745]]}
如何查看传递给这些函数的参数值？这将有助于追踪出现问题的原因。