Warnings and Errors contribute to hash

lib/Compilation.js

@@ -1103,6 +1103,17 @@ class Compilation extends Tapable {
 		for(let indexChunk = 0; indexChunk < chunks.length; indexChunk++) {
 			chunks[indexChunk].sortItems();
 		}
+
+		const byMessage = (a, b) => {
+			const ma = `${a.message}`;
+			const mb = `${b.message}`;
+			if(ma < mb) return -1;
+			if(mb < ma) return 1;
+			return 0;
+		}
+
+		this.errors.sort(byMessage);
+		this.warnings.sort(byMessage);
 	}
 
 	summarizeDependencies() {
@@ -1171,6 +1182,12 @@ class Compilation extends Tapable {
 		this.children.forEach(function(child) {
 			hash.update(child.hash);
 		});
+		this.warnings.forEach(function(warning) {
+			hash.update(`${warning.message}`);
+		});
+		this.errors.forEach(function(warning) {
+			hash.update(`${warning.message}`);
+		});
 		// clone needed as sort below is inplace mutation
 		const chunks = this.chunks.slice();
 		/**

test/statsCases/module-trace-disabled-in-error/expected.txt

@@ -1,4 +1,4 @@
-Hash: 6e950f2e83663cb6e9a6
+Hash: 96df8294017a444709b1
 Time: Xms
   Asset     Size  Chunks             Chunk Names
 main.js  2.65 kB       0  [emitted]  main

test/statsCases/module-trace-enabled-in-error/expected.txt

@@ -1,4 +1,4 @@
-Hash: 6e950f2e83663cb6e9a6
+Hash: d59adee54681f1f3ab37
 Time: Xms
   Asset     Size  Chunks             Chunk Names
 main.js  2.65 kB       0  [emitted]  main

test/watchCases/warnings/warnings-contribute-to-hash/0/changing-file.js

@@ -0,0 +1 @@
+Warning1

test/watchCases/warnings/warnings-contribute-to-hash/0/index.js

@@ -0,0 +1,12 @@
+require("./warning-loader!./changing-file");
+
+it("should detect a change on warnings change", function() {
+	switch(WATCH_STEP) {
+		case "0":
+			STATE.hash = STATS_JSON.hash;
+			break;
+		case "1":
+			STATS_JSON.hash.should.be.not.eql(STATE.hash);
+			break;
+	}
+});

test/watchCases/warnings/warnings-contribute-to-hash/0/warning-loader.js

@@ -0,0 +1,4 @@
+module.exports = function(source) {
+	this.emitWarning(new Error(source.trim()));
+	return "";
+};

test/watchCases/warnings/warnings-contribute-to-hash/0/warnings.js

@@ -0,0 +1,3 @@
+module.exports = [
+	[/Warning1/]
+];

test/watchCases/warnings/warnings-contribute-to-hash/1/changing-file.js

@@ -0,0 +1 @@
+New Warning

test/watchCases/warnings/warnings-contribute-to-hash/1/warnings.js

@@ -0,0 +1,3 @@
+module.exports = [
+	[/New Warning/]
+];