<<input.ll>> -> $opt
$opt -> .vsl-tempd0d7acc3.o
/opt/vsl/lib/cli/helpers/CompilerCLI.js:367
let name = reason.constructor.name;
^
TypeError: Cannot read property 'constructor' of null
at process._CLIMode.default.process.on.reason (/opt/vsl/lib/cli/helpers/CompilerCLI.js:367:21)
at emitTwo (events.js:131:20)
at process.emit (events.js:214:7)
at emitPendingUnhandledRejections (internal/process/promises.js:108:22)
at process._tickCallback (internal/process/next_tick.js:190:7)