Clojurians Log v2

> I wonder if this means every symlink results in an extra copy of the file, hmm Most likely - the error comes from a copy function.

Is the same as https://clojure.atlassian.net/browse/TBUILD-36

Execution error (NullPointerException) at clojure.tools.build.tasks.uber/copy-stream! (uber.clj:51). Cannot invoke “http://java.io.InputStream.read(byte[])” because “is” is null Full report at: /var/folders/fz/whkql1md3fj91wf5ww6g3j9r0000gn/T/clojure-16052673399864001532.edn

Full report: {:clojure.main/message "Execution error (NullPointerException) at clojure.tools.build.tasks.uber/copy-stream! (uber.clj:51).\nCannot invoke \".InputStream.read(byte[])\" because \"is\" is null\n", :clojure.main/triage {:clojure.error/class java.lang.NullPointerException, :clojure.error/line 51, :clojure.error/cause "Cannot invoke \".InputStream.read(byte[])\" because \"is\" is null", :clojure.error/symbol clojure.tools.build.tasks.uber/copy-stream!, :clojure.error/source "uber.clj", :clojure.error/phase :execution}, :clojure.main/trace {:via [{:type java.lang.NullPointerException, :message "Cannot invoke \".InputStream.read(byte[])\" because \"is\" is null", :at [clojure.tools.build.tasks.uber$copy_stream_BANG_ invokeStatic "uber.clj" 51]}], :trace [[clojure.tools.build.tasks.uber$copy_stream_BANG_ invokeStatic "uber.clj" 51] [clojure.tools.build.tasks.uber$copy_stream_BANG_ invoke "uber.clj" 46] [clojure.tools.build.tasks.uber$explode1 invokeStatic "uber.clj" 160] [clojure.tools.build.tasks.uber$explode1 invoke "uber.clj" 142] [clojure.tools.build.tasks.uber$explode$fn__3701 invoke "uber.clj" 203] [clojure.tools.build.tasks.uber$explode invokeStatic "uber.clj" 199] [clojure.tools.build.tasks.uber$explode invoke "uber.clj" 168] [clojure.tools.build.tasks.uber$uber$fn__3734$fn__3738 invoke "uber.clj" 285] [clojure.lang.PersistentVector reduce "PersistentVector.java" 418] [clojure.core$reduce invokeStatic "core.clj" 6964] [clojure.core$reduce invoke "core.clj" 6947] [clojure.tools.build.tasks.uber$uber$fn__3734 invoke "uber.clj" 284] [clojure.core.protocols$iterator_reduce_BANG_ invokeStatic "protocols.clj" 42] [clojure.core.protocols$iter_reduce invokeStatic "protocols.clj" 52] [clojure.core.protocols$fn__8260 invokeStatic "protocols.clj" 74] [clojure.core.protocols$fn__8260 invoke "protocols.clj" 74] [clojure.core.protocols$fn__8207$G__8202__8220 invoke "protocols.clj" 13] [clojure.core$reduce invokeStatic "core.clj" 6965] [clojure.core$reduce invoke "core.clj" 6947] [clojure.tools.build.tasks.uber$uber invokeStatic "uber.clj" 282] [clojure.tools.build.tasks.uber$uber invoke "uber.clj" 269] [clojure.lang.Var invoke "Var.java" 386] [clojure.tools.build.api$uber invokeStatic "api.clj" 512] [clojure.tools.build.api$uber invoke "api.clj" 440] [build$uber invokeStatic "build.clj" 37] [build$uber invoke "build.clj" 29] [clojure.lang.Var invoke "Var.java" 386] [clojure.run.exec$exec invokeStatic "exec.clj" 88] [clojure.run.exec$exec invoke "exec.clj" 78] [clojure.run.exec$_main$fn__218 invoke "exec.clj" 227] [clojure.run.exec$_main invokeStatic "exec.clj" 223] [clojure.run.exec$_main doInvoke "exec.clj" 191] [clojure.lang.RestFn applyTo "RestFn.java" 140] [clojure.lang.Var applyTo "Var.java" 707] [clojure.core$apply invokeStatic "core.clj" 667] [clojure.main$main_opt invokeStatic "main.clj" 515] [clojure.main$main_opt invoke "main.clj" 511] [clojure.main$main invokeStatic "main.clj" 665] [clojure.main$main doInvoke "main.clj" 617] [clojure.lang.RestFn applyTo "RestFn.java" 140] [clojure.lang.Var applyTo "Var.java" 707] [clojure.main main "main.java" 40]], :cause "Cannot invoke \".InputStream.read(byte[])\" because \"is\" is null"}}

openjdk 25.0.2 2026-01-20 LTS OpenJDK Runtime Environment Temurin-25.0.2+10 (build 25.0.2+10-LTS) OpenJDK 64-Bit Server VM Temurin-25.0.2+10 (build 25.0.2+10-LTS, mixed mode, sharing)

macos 26.3.1

Clojure CLI version 1.12.4.1602

I had a vague memory of having hit this before. I guess my Google skiils weren’t as good tonight. This is caused by broken symlinks (target does not exist) in the project dir, in this case resources. A non issue for my project but maybe symlinks are not a thing in jars with their zip filesystems so they all have to be resolved (?) or maybe they just are resolved by tools,.build. (I wonder if this means every symlink results in an extra copy of the file, hmm.) I tried poking around to see what’s going on in tools.build but lost patience.

For others like me, confused by sudden failed builds and no new added libs/files: this can also be triggered by 'temp/transient' files your editor might conjure up for its autosave/backup system 😅, try a :wa or C-x s first