capture and report parser panics

internal/bundler/bundler.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"math/rand"
 	"net/http"
+	"runtime/debug"
 	"sort"
 	"strings"
 	"sync"
@@ -171,6 +172,21 @@ func parseFile(args parseArgs) {
 		},
 	}
 
+	defer func() {
+		r := recover()
+		if r != nil {
+			stack := strings.TrimSpace(string(debug.Stack()))
+			tracker := logger.MakeLineColumnTracker(&source)
+			data := logger.RangeData(&tracker, logger.Range{}, fmt.Sprintf("panic: %v", r))
+			data.Location.LineText = fmt.Sprintf("%s\n%s", data.Location.LineText, stack)
+			args.log.AddMsg(logger.Msg{
+				Kind: logger.Error,
+				Data: data,
+			})
+			args.results <- result
+		}
+	}()
+
 	switch loader {
 	case config.LoaderJS:
 		ast, ok := args.caches.JSCache.Parse(args.log, source, js_parser.OptionsFromConfig(&args.options))

scripts/test262.js

@@ -45,6 +45,7 @@ async function main() {
   let reparseCount = 0;
   let reprintCount = 0;
   let minifyCount = 0;
+  let panicCount = 0;
 
   async function esbuildFile(input, options) {
     try {
@@ -155,7 +156,7 @@ async function main() {
       return
     }
 
-    const result = await esbuildFile(content, { minify: false });
+    const result = await esbuildFile(content, { minify: false, sourcefile: file });
 
     if (result.success !== shouldParse) {
       if (!result.success) shouldHavePassed++;
@@ -188,6 +189,13 @@ async function main() {
         }
       }
     }
+
+    else if (result.error.toString().includes('panic')) {
+      console.log(`\n!!! PANIC: ${file} !!!`);
+      console.log(`${result.error}\n${result.error.errors[0].location.lineText}`);
+      panicCount++;
+    }
+
     runCount++;
   }
 
@@ -220,6 +228,7 @@ async function main() {
   console.log(`reparse failures: ${reparseCount}`);
   console.log(`reprint failures: ${reprintCount}`);
   console.log(`minify failures: ${minifyCount}`);
+  console.log(`panics: ${panicCount}`);
 }
 
 main().catch(e => setTimeout(() => {