Recover from serialization failures (#5591)

An exception encountered during serialization prevents engine from continuing because it enters an infinite loop(!).

# Important Notes
The aim of this PR is to make it possible for engine to recover from the serialization failures. Any failure would mean that we enter an infinite loop in deserialization which is in turn waiting for the serialization to finish (which will never happen).
In this particular case FQNs are [referencing concrete modules](#5037). A separate PR will address that.

CHANGELOG.md

@@ -558,6 +558,7 @@
 - [Convert large longs to doubles, safely, for host calls][4099]
 - [Profile engine startup][4110]
 - [Report type of polyglot values][4111]
+- [Engine can now recover from serialization failures][5591]
 
 [3227]: https://github.com/enso-org/enso/pull/3227
 [3248]: https://github.com/enso-org/enso/pull/3248
@@ -650,6 +651,7 @@
 [4099]: https://github.com/enso-org/enso/pull/4099
 [4110]: https://github.com/enso-org/enso/pull/4110
 [4111]: https://github.com/enso-org/enso/pull/4111
+[5591]: https://github.com/enso-org/enso/pull/5591
 
 # Enso 2.0.0-alpha.18 (2021-10-12)
 

engine/runtime/src/main/scala/org/enso/compiler/SerializationManager.scala

@@ -289,11 +289,20 @@ class SerializationManager(compiler: Compiler) {
       case e: NotSerializableException =>
         logger.log(
           Level.SEVERE,
-          s"Could not serialize module [$name]."
+          s"Could not serialize module [$name].",
+          e
         )
         throw e
+      case e: Throwable =>
+        logger.log(
+          Level.SEVERE,
+          s"Serialization of module `$name` failed: ${e.getMessage}`",
+          e
+        )
+        throw e
+    } finally {
+      finishSerializing(name)
     }
-    finishSerializing(name)
   }
 
   /** Sets the module described by `name` as serializing.