Don't dereference the first element of an empty container.

amccarth-google · amccarth-google · commit e286b8d652e4 · 2016-02-10T00:06:50.000Z
llvm-svn: 260331
diff --git a/lldb/source/Symbol/Symtab.cpp b/lldb/source/Symbol/Symtab.cpp
@@ -56,7 +56,7 @@ Symtab::Resize(size_t count)
     // Clients should grab the mutex from this symbol table and lock it manually
     // when calling this function to avoid performance issues.
     m_symbols.resize (count);
-    return &m_symbols[0];
+    return m_symbols.empty() ? nullptr : &m_symbols[0];
 }
 
 uint32_t

Original file line number	Diff line number	Diff line change
`@@ -56,7 +56,7 @@ Symtab::Resize(size_t count)`
`56`	`56`	`// Clients should grab the mutex from this symbol table and lock it manually`
`57`	`57`	`// when calling this function to avoid performance issues.`
`58`	`58`	`m_symbols.resize (count);`
`59`		`- return &m_symbols[0];`
	`59`	`+ return m_symbols.empty() ? nullptr : &m_symbols[0];`
`60`	`60`	`}`
`61`	`61`
`62`	`62`	`uint32_t`