From 2e24197da348ff89325d81857be5adb87dc2fcf6 Mon Sep 17 00:00:00 2001
From: Georgiy Kassabli <gkassabli@fb.com>
Date: Tue, 23 May 2017 11:11:37 -0700
Subject: [PATCH] Fixing potential measure call with negative size value

Reviewed By: emilsjolander

Differential Revision: D5111534

fbshipit-source-id: 99f09b85f0c6a0e5dec89a26baba8f9d560100da
---
 ReactCommon/yoga/yoga/Yoga.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/ReactCommon/yoga/yoga/Yoga.c b/ReactCommon/yoga/yoga/Yoga.c
index 9aaa6333e..e77a9ca6d 100644
--- a/ReactCommon/yoga/yoga/Yoga.c
+++ b/ReactCommon/yoga/yoga/Yoga.c
@@ -1736,8 +1736,13 @@ static void YGNodeWithMeasureFuncSetMeasuredDimensions(const YGNodeRef node,
   const float marginAxisRow = YGNodeMarginForAxis(node, YGFlexDirectionRow, availableWidth);
   const float marginAxisColumn = YGNodeMarginForAxis(node, YGFlexDirectionColumn, availableWidth);
 
-  const float innerWidth = availableWidth - marginAxisRow - paddingAndBorderAxisRow;
-  const float innerHeight = availableHeight - marginAxisColumn - paddingAndBorderAxisColumn;
+  // We want to make sure we don't call measure with negative size
+  const float innerWidth = YGFloatIsUndefined(availableWidth)
+                            ? availableWidth
+                            : fmaxf(0, availableWidth - marginAxisRow - paddingAndBorderAxisRow);
+  const float innerHeight = YGFloatIsUndefined(availableHeight)
+                            ? availableHeight
+                            : fmaxf(0, availableHeight - marginAxisColumn - paddingAndBorderAxisColumn);
 
   if (widthMeasureMode == YGMeasureModeExactly && heightMeasureMode == YGMeasureModeExactly) {
     // Don't bother sizing the text if both dimensions are already defined.