From 6b11259c46f3133ee48a21561fe0dab58cee6847 Mon Sep 17 00:00:00 2001
From: Valentin Shergin <shergin@fb.com>
Date: Tue, 19 Sep 2017 14:15:11 -0700
Subject: [PATCH] Fixed issue with measuring text with NaN width

Summary:
Looks like `-[NSLayoutManager ensureLayoutForTextContainer:textContainer]` has a bug that cause infinite loop inside this method
during measuring some special characters AND when specified `width` equals NaN (which is useless anyways).

So, we cover this case in this diff.

Reviewed By: javache

Differential Revision: D5859767

fbshipit-source-id: 58a5910f21f282bf5b82494916b5b02ad72d357f
---
 Libraries/Text/RCTShadowText.m | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Libraries/Text/RCTShadowText.m b/Libraries/Text/RCTShadowText.m
index f7fb71110..b25c8c744 100644
--- a/Libraries/Text/RCTShadowText.m
+++ b/Libraries/Text/RCTShadowText.m
@@ -220,7 +220,10 @@ static YGSize RCTMeasure(YGNodeRef node, float width, YGMeasureMode widthMode, f
   }
 
   textContainer.maximumNumberOfLines = _numberOfLines;
-  textContainer.size = (CGSize){widthMode == YGMeasureModeUndefined ? CGFLOAT_MAX : width, CGFLOAT_MAX};
+  textContainer.size = (CGSize){
+    widthMode == YGMeasureModeUndefined || isnan(width) ? CGFLOAT_MAX : width,
+    CGFLOAT_MAX
+  };
 
   [layoutManager addTextContainer:textContainer];
   [layoutManager ensureLayoutForTextContainer:textContainer];