[Bf-blender-cvs] [1d9092f6322] master: Fix Crash: Access Unallocated Memory.

[Jeroen Bakker]

Commit: 1d9092f632288525780615111883c0a9c8a36900
Author: Jeroen Bakker
Date:   Mon Mar 1 15:09:01 2021 +0100
Branches: master
https://developer.blender.org/rB1d9092f632288525780615111883c0a9c8a36900

Fix Crash: Access Unallocated Memory.

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M	source/blender/blenkernel/intern/cryptomatte.cc

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diff --git a/source/blender/blenkernel/intern/cryptomatte.cc b/source/blender/blenkernel/intern/cryptomatte.cc
index 4bdcf845cb3..1f194daf132 100644
--- a/source/blender/blenkernel/intern/cryptomatte.cc
+++ b/source/blender/blenkernel/intern/cryptomatte.cc
@@ -253,6 +253,9 @@ constexpr StringRef WHITESPACES = " \t\n\v\f\r";
 static constexpr blender::StringRef skip_whitespaces_(blender::StringRef ref)
 {
   size_t skip = ref.find_first_not_of(WHITESPACES);
+  if (skip == blender::StringRef::not_found) {
+    return ref;
+  }
   return ref.drop_prefix(skip);
 }