From ae4bc48481c7d097a15ce9c81d00655efdcd5a2c Mon Sep 17 00:00:00 2001
From: up-to-you <artursabirovdev@gmail.com>
Date: Wed, 7 Nov 2018 09:38:34 +0100
Subject: [PATCH] Fix stack-trace line breaks in whitelabel error views

Since gh-12838, the WebFlux whitelabel error view also shows the
stacktrace information if it is available in the model.

This commit adds a CSS directive that preserves white spaces and breaks
lines at newline characters.
---
 .../web/reactive/error/AbstractErrorWebExceptionHandler.java    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/reactive/error/AbstractErrorWebExceptionHandler.java b/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/reactive/error/AbstractErrorWebExceptionHandler.java
index b79c3219bc0..52e0fa002c7 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/reactive/error/AbstractErrorWebExceptionHandler.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/reactive/error/AbstractErrorWebExceptionHandler.java
@@ -202,7 +202,7 @@ public abstract class AbstractErrorWebExceptionHandler
 			builder.append("<div>").append(htmlEscape(message)).append("</div>");
 		}
 		if (trace != null) {
-			builder.append("<div>").append(htmlEscape(trace)).append("</div>");
+			builder.append("<div style='white-space:pre-wrap;'>").append(htmlEscape(trace)).append("</div>");
 		}
 		builder.append("</body></html>");
 		return responseBody.syncBody(builder.toString());