diff --git a/src/crystalFormatting.ts b/src/crystalFormatting.ts
index cd8e1cc..2ca5ba8 100755
--- a/src/crystalFormatting.ts
+++ b/src/crystalFormatting.ts
@@ -10,20 +10,25 @@ export class CrystalFormattingProvider implements vscode.DocumentFormattingEditP
 
 	/**
 	 * Execute crystal tool format and get response.
+	 * Returns tuple of [stdout, stderr] texts.
 	 */
 	execFormat(document: vscode.TextDocument) {
-		return new Promise(function (resolve, reject) {
-			let response = ""
+		return new Promise<[string, string]>(function (resolve, reject) {
+			let responseOut = ""
+			let responseErr = ""
 			const config = vscode.workspace.getConfiguration("crystal-lang")
 			let child = spawn(`${config["compiler"]}`, ["tool", "format", "--no-color", "-"])
 			child.stdin.write(document.getText())
 			child.stdin.end()
 			childOnError(child)
-			childOnStd(child, "data", (data) => {
-				response += data
-			})
+			child.stdout.on("data", (data) => {
+				responseOut += data
+			});
+			child.stderr.on("data", (data) => {
+				responseErr += data
+			});
 			childOnStd(child, "end", () => {
-				return resolve(response)
+				return resolve([responseOut, responseErr])
 			})
 		})
 	}
@@ -33,6 +38,8 @@ export class CrystalFormattingProvider implements vscode.DocumentFormattingEditP
 	 */
 	async provideDocumentFormattingEdits(document: vscode.TextDocument) {
 		let response = await this.execFormat(document)
+		let responseOut = response[0]
+		let responseErr = response[1]
 		let textEditData: vscode.TextEdit[] = []
 
 		// OnFly error check is disabled because -f json was removed from crystal, see:
@@ -42,11 +49,11 @@ export class CrystalFormattingProvider implements vscode.DocumentFormattingEditP
 		// }
 
 		// QuickFix to replace current code with formated one only if no syntax error is found
-		if ((searchProblemsFromRaw(response.toString(), document.uri).length == 0) &&
-			response.toString().length > 0) {
+		if ((searchProblemsFromRaw(responseErr, document.uri).length == 0) &&
+			responseOut.length > 0) {
 			let lastLineId = document.lineCount - 1
 			let range = new vscode.Range(0, 0, lastLineId, document.lineAt(lastLineId).text.length)
-			textEditData = [vscode.TextEdit.replace(range, response.toString())]
+			textEditData = [vscode.TextEdit.replace(range, responseOut)]
 		}
 
 		return textEditData
diff --git a/src/crystalUtils.ts b/src/crystalUtils.ts
index be9c905..48a81ca 100755
--- a/src/crystalUtils.ts
+++ b/src/crystalUtils.ts
@@ -199,7 +199,7 @@ export function searchProblemsFromRaw(response: string, uri: vscode.Uri) {
 
 	const config = vscode.workspace.getConfiguration("crystal-lang")
 
-	let responseData = response.match(/.* in .*(\d+): (.*)/)
+	let responseData = response.match(/.* in .*?(\d+):\S* (.*)/)
 
 	let parsedLine:number