Various things may go wrong when a user-provided Compiler is producing an Item. Typically these end up as a CompilerError which gets logged and we stop execution.
However, due to laziness, it's possible to have a compiler succeed, but return an Item that will throw an exception when it's written. This will break the waiting mechanism in the scheduler, causing a thread blocked indefinitely in an MVar operation error like in #1014. I added a test case reproducing this.
Various things may go wrong when a user-provided
Compileris producing anItem. Typically these end up as aCompilerErrorwhich gets logged and we stop execution.However, due to laziness, it's possible to have a compiler succeed, but return an
Itemthat will throw an exception when it's written. This will break the waiting mechanism in the scheduler, causing athread blocked indefinitely in an MVar operationerror like in #1014. I added a test case reproducing this.