Could not load the cache metadata at Hello_World.meta in HelloWorldCacheTest

[hubertp]

The PR makes simple build.sbt cleanups yet we get an assertion failure in runtime-integration-tests:

 INFO ide_ci::program::command: sbt ℹ️ [error] Test org.enso.interpreter.caches.HelloWorldCacheTest.loadingHelloWorldTwiceUsesCaching failed: java.lang.AssertionError: Contains hello world:
 INFO ide_ci::program::command: sbt ℹ️ [error] [enso::Compiler] FINE: Parsing module [Hello_World].
 INFO ide_ci::program::command: sbt ℹ️ [error] [enso::Cache] FINE: Could not load the cache metadata at [***\Hello_World.meta].
 INFO ide_ci::program::command: sbt ℹ️ [error] [enso::Cache] FINE: Could not load the cache metadata at [***\Hello_World.meta].
 INFO ide_ci::program::command: sbt ℹ️ [error] [enso::SerializationPool] FINE: Unable to load a cache for module [Hello_World].
 INFO ide_ci::program::command: sbt ℹ️ [error] [enso::SerializationPool] FINE: Deserializing module Hello_World from IR file: false
 INFO ide_ci::program::command: sbt ℹ️ [error] [enso::Compiler] FINE: Loading module [Hello_World] from source.
 INFO ide_ci::program::command: sbt ℹ️ [error] [enso::Compiler] FINE: Generating code for module [Hello_World].
 INFO ide_ci::program::command: sbt ℹ️ [error] [enso::SerializationPool] FINE: Requesting serialization for module [Hello_World].
 INFO ide_ci::program::command: sbt ℹ️ [error] Hello World
 INFO ide_ci::program::command: sbt ℹ️ [error] [enso::SerializationPool] FINE: Running serialization for module [Hello_World]., took 2.205 sec
 INFO ide_ci::program::command: sbt ℹ️ [error]     at org.enso.interpreter.caches.HelloWorldCacheTest.loadingHelloWorldTwiceUsesCaching(HelloWorldCacheTest.java:26)
 INFO ide_ci::program::command: sbt ℹ️ [error]     at jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
 INFO ide_ci::program::command: sbt ℹ️ [error]     at java.lang.reflect.Method.invoke(Method.java:580)
 INFO ide_ci::program::command: sbt ℹ️ [error]     ...
 INFO ide_ci::program::command: sbt ℹ️ [info] Test run org.enso.interpreter.caches.HelloWorldCacheTest finished: 1 failed, 0 ignored, 1 total, 2.205s

https://github.com/enso-org/enso/actions/runs/11057308790/job/30720802542?pr=11170#step:7:6304

[JaroslavTulach]

Luckily the test collects logs, inspects them and searches for predefined words. When it fails, it prints the log and we can inspect them. Printing the logs in a correct run can be achieved with:

enso.master$ git diff
diff --git engine/runtime-integration-tests/src/test/java/org/enso/interpreter/caches/HelloWorldCacheTest.java engine/runtime-integration-tests/src/test/java/org/enso/interpreter/caches/HelloWorldCacheTest.java
index 77ce983116..efc4be3292 100644
--- engine/runtime-integration-tests/src/test/java/org/enso/interpreter/caches/HelloWorldCacheTest.java
+++ engine/runtime-integration-tests/src/test/java/org/enso/interpreter/caches/HelloWorldCacheTest.java
@@ -39,7 +39,7 @@ public class HelloWorldCacheTest {
             containsString("Deserializing module"),
             containsString("Hello_World"),
             containsString("from IR file: true")));
-  }
+  assertTrue("OK:\n" + secondMsgs, false);}
 
   private static String executeOnce(File src) throws Exception {
     var backLog = new ByteArrayOutputStream();

let's compare the logs:

The only common log is:

FINE: Parsing module [Hello_World].

then there is a difference. For same reason the CI failure Could not load the cache metadata at [***\Hello_World.meta] - e.g. this is a bug in the caching infrastructure, not in the test.

[JaroslavTulach]

Additional logs to explain why

Could not load the cache metadata at [***\Hello_World.meta]

is the file missing? Is it corrupted? Does it have wrong time stamp? Might explain why the test fails.