From 449d1786c2e253f7f725bd85dc4f4246f81f397d Mon Sep 17 00:00:00 2001
From: Ivan Kopeykin <ivan.kopeykin@gmail.com>
Date: Wed, 23 Mar 2022 18:41:16 +0300
Subject: [PATCH 1/2] catch error in runAsChild callback

---
 lib/Compiler.js | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/lib/Compiler.js b/lib/Compiler.js
index bd7474d8f..44712d492 100644
--- a/lib/Compiler.js
+++ b/lib/Compiler.js
@@ -545,8 +545,21 @@ class Compiler {
 	 */
 	runAsChild(callback) {
 		const startTime = Date.now();
+
+		const finalCallback = (err, entries, compilation) => {
+			try {
+				if (err) return callback(err);
+				callback(null, entries, compilation);
+			} catch (e) {
+				const err = new WebpackError(
+					`compiler.runAsChild callback error: ${e}`
+				);
+				this.parentCompilation.errors.push(err);
+			}
+		};
+
 		this.compile((err, compilation) => {
-			if (err) return callback(err);
+			if (err) return finalCallback(err);
 
 			this.parentCompilation.children.push(compilation);
 			for (const { name, source, info } of compilation.getAssets()) {
@@ -561,7 +574,7 @@ class Compiler {
 			compilation.startTime = startTime;
 			compilation.endTime = Date.now();
 
-			return callback(null, entries, compilation);
+			return finalCallback(null, entries, compilation);
 		});
 	}
 

From 3929e688a4eb169f0698dece4120adc0f7bc77f3 Mon Sep 17 00:00:00 2001
From: Ivan Kopeykin <ivan.kopeykin@gmail.com>
Date: Mon, 28 Mar 2022 15:37:52 +0300
Subject: [PATCH 2/2] fix discussions

---
 lib/Compiler.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/Compiler.js b/lib/Compiler.js
index 44712d492..2bdd15b99 100644
--- a/lib/Compiler.js
+++ b/lib/Compiler.js
@@ -548,12 +548,12 @@ class Compiler {
 
 		const finalCallback = (err, entries, compilation) => {
 			try {
-				if (err) return callback(err);
-				callback(null, entries, compilation);
+				callback(err, entries, compilation);
 			} catch (e) {
 				const err = new WebpackError(
 					`compiler.runAsChild callback error: ${e}`
 				);
+				err.details = e.stack;
 				this.parentCompilation.errors.push(err);
 			}
 		};