webpack
diff --git a/‎lib/FileSystemInfo.js
Lines changed: 6 additions & 2 deletions b/‎lib/FileSystemInfo.js
Lines changed: 6 additions & 2 deletions
diff --git a/‎test/Watch.test.js
Lines changed: 61 additions & 0 deletions b/‎test/Watch.test.js
Lines changed: 61 additions & 0 deletions
diff --git a/‎test/fixtures/watch/node_modules/inline-loader/index.js
Lines changed: 3 additions & 0 deletions b/‎test/fixtures/watch/node_modules/inline-loader/index.js
Lines changed: 3 additions & 0 deletions
diff --git a/‎test/fixtures/watch/node_modules/inline-loader/package.json
Lines changed: 4 additions & 0 deletions b/‎test/fixtures/watch/node_modules/inline-loader/package.json
Lines changed: 4 additions & 0 deletions
diff --git a/‎test/fixtures/watch/node_modules/nested-package1/index.js b/‎test/fixtures/watch/node_modules/nested-package1/index.js
diff --git a/‎test/fixtures/watch/node_modules/nested-package1/package.json
Lines changed: 4 additions & 0 deletions b/‎test/fixtures/watch/node_modules/nested-package1/package.json
Lines changed: 4 additions & 0 deletions
diff --git a/‎test/fixtures/watch/node_modules/package/index.js
Lines changed: 4 additions & 0 deletions b/‎test/fixtures/watch/node_modules/package/index.js
Lines changed: 4 additions & 0 deletions
diff --git a/‎test/fixtures/watch/node_modules/package/node_modules/nested-package2/index.js b/‎test/fixtures/watch/node_modules/package/node_modules/nested-package2/index.js
diff --git a/‎test/fixtures/watch/node_modules/package/node_modules/nested-package2/package.json
Lines changed: 4 additions & 0 deletions b/‎test/fixtures/watch/node_modules/package/node_modules/nested-package2/package.json
Lines changed: 4 additions & 0 deletions
diff --git a/‎test/fixtures/watch/node_modules/package/package.json
Lines changed: 4 additions & 0 deletions b/‎test/fixtures/watch/node_modules/package/package.json
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@@ -2256,7 +2256,9 @@ class FileSystemInfo {
 		for (const path of managedItems) {
 			const cache = this._managedItems.get(path);
 			if (cache !== undefined) {
-				managedFiles.add(join(this.fs, path, "package.json"));
+				if (cache !== "missing") {
+					managedFiles.add(join(this.fs, path, "package.json"));
+				}
 				managedItemInfo.set(path, cache);
 			} else {
 				jobs++;
@@ -2269,7 +2271,9 @@ class FileSystemInfo {
 						}
 						jobError();
 					} else if (entry) {
-						managedFiles.add(join(this.fs, path, "package.json"));
+						if (entry !== "missing") {
+							managedFiles.add(join(this.fs, path, "package.json"));
+						}
 						managedItemInfo.set(path, entry);
 						jobDone();
 					} else {
 
@@ -0,0 +1,61 @@
+"use strict";
+
+require("./helpers/warmup-webpack");
+
+const path = require("path");
+const webpack = require("..");
+const { createFsFromVolume, Volume } = require("memfs");
+
+describe("Watch", () => {
+	jest.setTimeout(10000);
+
+	it("should only compile a single time", done => {
+		let counterBeforeCompile = 0;
+		let counterDone = 0;
+		let counterHandler = 0;
+		const compiler = webpack(
+			{
+				context: path.resolve(__dirname, "fixtures/watch"),
+				watch: true,
+				mode: "development",
+				snapshot: {
+					managedPaths: [/^(.+?[\\/]node_modules[\\/])/]
+				},
+				experiments: {
+					futureDefaults: true
+				},
+				module: {
+					// unsafeCache: false,
+					rules: [
+						{
+							test: /\.js$/,
+							use: "some-loader"
+						}
+					]
+				},
+				plugins: [
+					c => {
+						c.hooks.beforeCompile.tap("test", () => {
+							counterBeforeCompile++;
+						});
+						c.hooks.done.tap("test", () => {
+							counterDone++;
+						});
+					}
+				]
+			},
+			(err, stats) => {
+				if (err) return done(err);
+				if (stats.hasErrors()) return done(new Error(stats.toString()));
+				counterHandler++;
+			}
+		);
+		compiler.outputFileSystem = createFsFromVolume(new Volume());
+		setTimeout(() => {
+			expect(counterBeforeCompile).toBe(1);
+			expect(counterDone).toBe(1);
+			expect(counterHandler).toBe(1);
+			compiler.close(done);
+		}, 5000);
+	});
+});