[llvm] r310298 - [llvm-pdbutil] Don't crash when a section contrib's isect is invalid.

[Zachary Turner via llvm-commits]

Author: zturner
Date: Mon Aug  7 13:24:01 2017
New Revision: 310298

URL: http://llvm.org/viewvc/llvm-project?rev=310298&view=rev
Log:
[llvm-pdbutil] Don't crash when a section contrib's isect is invalid.

Modified:
    llvm/trunk/tools/llvm-pdbutil/DumpOutputStyle.cpp

Modified: llvm/trunk/tools/llvm-pdbutil/DumpOutputStyle.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/llvm-pdbutil/DumpOutputStyle.cpp?rev=310298&r1=310297&r2=310298&view=diff
==============================================================================
--- llvm/trunk/tools/llvm-pdbutil/DumpOutputStyle.cpp (original)
+++ llvm/trunk/tools/llvm-pdbutil/DumpOutputStyle.cpp Mon Aug  7 13:24:01 2017
@@ -1180,8 +1180,12 @@ Error DumpOutputStyle::dumpSectionContri
     }
     void visit(const SectionContrib &SC) override {
       assert(SC.ISect > 0);
-      StringRef SectionName = Names[SC.ISect - 1];
-      std::string NameInsert = formatv("[{0}]", SectionName).str();
+      std::string NameInsert;
+      if (SC.ISect < Names.size()) {
+        StringRef SectionName = Names[SC.ISect - 1];
+        NameInsert = formatv("[{0}]", SectionName).str();
+      } else
+        NameInsert = "[???]";
       P.formatLine("SC{5}  | mod = {2}, {0}, size = {1}, data crc = {3}, reloc "
                    "crc = {4}",
                    formatSegmentOffset(SC.ISect, SC.Off), fmtle(SC.Size),