Error messages from commands are not printed on the command line

[Gohla]

Summary

When a command fails with error messages, they are not printed to the command line. The issue is here: https://github.com/metaborg/spoofax-pie/blob/develop/core/spoofax.cli/src/main/java/mb/spoofax/cli/CommandRunner.java#L70. The toString method of KeyedMessages does not print all messages because that can be expensive. Instead, ExceptionPrinter#printMessages should be used to print the messages.

What you did

Run a command with an error on the command line.

What you expected to happen

The error messages to be printed.

What actually happened

The error messages are not printed, instead printing something like KeyedMessages(1 messages).

Context

• Spoofax version: 0.19.6