From 08bbfb94bba9f166bea169b02364fcb794c8af31 Mon Sep 17 00:00:00 2001
From: cap-Bernardito <cap-Bernardito@yandex.ru>
Date: Thu, 10 Dec 2020 20:05:21 +0300
Subject: [PATCH 1/2] fix: serializing big strings in sourceMap

---
 package-lock.json                             |  6 ++++
 package.json                                  |  1 +
 src/index.js                                  |  2 +-
 src/loader.js                                 |  5 ++-
 test/TestCases.test.js                        |  4 +++
 .../serializingBigStrings/webpack.config.js   | 35 +++++++++++++++++++
 6 files changed, 51 insertions(+), 2 deletions(-)
 create mode 100644 test/cases/serializingBigStrings/webpack.config.js

diff --git a/package-lock.json b/package-lock.json
index f91a1106..5fe1df23 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -3345,6 +3345,12 @@
         "multicast-dns-service-types": "^1.1.0"
       }
     },
+    "bootstrap": {
+      "version": "4.5.3",
+      "resolved": "https://registry.npmjs.org/bootstrap/-/bootstrap-4.5.3.tgz",
+      "integrity": "sha512-o9ppKQioXGqhw8Z7mah6KdTYpNQY//tipnkxppWhPbiSWdD+1raYsnhwEZjkTHYbGee4cVQ0Rx65EhOY/HNLcQ==",
+      "dev": true
+    },
     "brace-expansion": {
       "version": "1.1.11",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
diff --git a/package.json b/package.json
index 91d39533..2346329c 100644
--- a/package.json
+++ b/package.json
@@ -57,6 +57,7 @@
     "@webpack-contrib/eslint-config-webpack": "^3.0.0",
     "babel-eslint": "^10.1.0",
     "babel-jest": "^26.6.3",
+    "bootstrap": "^4.5.3",
     "cross-env": "^7.0.2",
     "css-loader": "^5.0.1",
     "del": "^6.0.0",
diff --git a/src/index.js b/src/index.js
index 95c5798e..6e791e57 100644
--- a/src/index.js
+++ b/src/index.js
@@ -685,7 +685,7 @@ class MiniCssExtractPlugin {
             new SourceMapSource(
               content,
               m.readableIdentifier(requestShortener),
-              m.sourceMap
+              m.sourceMap.toString()
             )
           );
         } else {
diff --git a/src/loader.js b/src/loader.js
index bff3e867..c7370666 100644
--- a/src/loader.js
+++ b/src/loader.js
@@ -239,7 +239,10 @@ export function pitch(request) {
             context: module.context,
             content: Buffer.from(content),
             media,
-            sourceMap,
+            sourceMap: sourceMap
+              ? Buffer.from(JSON.stringify(sourceMap))
+              : // eslint-disable-next-line no-undefined
+                undefined,
           };
         });
       }
diff --git a/test/TestCases.test.js b/test/TestCases.test.js
index 16308165..61bb19e2 100644
--- a/test/TestCases.test.js
+++ b/test/TestCases.test.js
@@ -98,6 +98,10 @@ describe('TestCases', () => {
     if (!/^(\.|_)/.test(directory)) {
       // eslint-disable-next-line no-loop-func
       it(`${directory} should compile to the expected result`, (done) => {
+        if (directory === 'serializingBigStrings') {
+          clearDirectory(path.resolve(__dirname, '../node_modules/.cache'));
+        }
+
         const directoryForCase = path.resolve(casesDirectory, directory);
         const outputDirectoryForCase = path.resolve(outputDirectory, directory);
         // eslint-disable-next-line import/no-dynamic-require, global-require
diff --git a/test/cases/serializingBigStrings/webpack.config.js b/test/cases/serializingBigStrings/webpack.config.js
new file mode 100644
index 00000000..4117185e
--- /dev/null
+++ b/test/cases/serializingBigStrings/webpack.config.js
@@ -0,0 +1,35 @@
+import Self from '../../../src/index';
+
+module.exports = {
+  cache: { type: 'filesystem' },
+  entry: 'bootstrap/dist/css/bootstrap.css',
+  module: {
+    rules: [
+      {
+        test: /\.css$/,
+        use: [
+          Self.loader,
+          {
+            loader: 'css-loader',
+            options: {
+              sourceMap: true,
+            },
+          },
+        ],
+      },
+    ],
+  },
+
+  plugins: [
+    new Self(),
+    {
+      apply(compiler) {
+        compiler.hooks.infrastructureLog.tap('test', (origin, type, args) => {
+          if (type === 'warn' || type === 'error') {
+            throw new Error(`<${type}> [${origin}] ${args.toString()}`);
+          }
+        });
+      },
+    },
+  ],
+};

From e2df02b09162be14771b1f4bc9843a9226053bd7 Mon Sep 17 00:00:00 2001
From: cap-Bernardito <cap-Bernardito@yandex.ru>
Date: Thu, 10 Dec 2020 20:08:15 +0300
Subject: [PATCH 2/2] fix: serializing big strings in sourceMap

---
 package-lock.json | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index 5fe1df23..64c70367 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -7919,9 +7919,9 @@
       "dev": true
     },
     "ini": {
-      "version": "1.3.5",
-      "resolved": "https://registry.npmjs.org/ini/-/ini-1.3.5.tgz",
-      "integrity": "sha512-RZY5huIKCMRWDUqZlEi72f/lmXKMvuszcMBduliQ3nnWbx9X/ZBQO7DijMEYS9EhHBb2qacRUMtC7svLwe0lcw==",
+      "version": "1.3.7",
+      "resolved": "https://registry.npmjs.org/ini/-/ini-1.3.7.tgz",
+      "integrity": "sha512-iKpRpXP+CrP2jyrxvg1kMUpXDyRUFDWurxbnVT1vQPx+Wz9uCYsMIqYuSBLV+PAaZG/d7kRLKRFc9oDMsH+mFQ==",
       "dev": true
     },
     "inquirer": {