standalone: Improve error output format

Cargo.lock

@@ -705,6 +705,7 @@ version = "0.1.0"
 dependencies = [
  "clap",
  "inkwell",
+ "itertools 0.11.0",
  "nac3core",
  "nac3parser",
  "parking_lot",

nac3standalone/Cargo.toml

@@ -5,6 +5,7 @@ authors = ["M-Labs"]
 edition = "2021"
 
 [dependencies]
+itertools = "0.11"
 parking_lot = "0.12"
 nac3parser = { path = "../nac3parser" }
 nac3core = { path = "../nac3core" }

nac3standalone/src/main.rs

@@ -6,6 +6,7 @@ use inkwell::{
     targets::*,
     OptimizationLevel,
 };
+use itertools::Itertools;
 use parking_lot::{Mutex, RwLock};
 use std::{borrow::Borrow, collections::HashMap, fs, path::Path, sync::Arc};
 
@@ -296,7 +297,12 @@ fn main() {
     let signature = store.from_signature(&mut composer.unifier, &primitive, &signature, &mut cache);
     let signature = store.add_cty(signature);
 
-    composer.start_analysis(true).unwrap();
+    if let Err(errs) = composer.start_analysis(true) {
+        panic!(
+            "compilation failed\n----------\n{}",
+            errs.into_iter().sorted().join("\n----------\n")
+        );
+    }
 
     let top_level = Arc::new(composer.make_top_level_context());