return reference (gcc), C++ (gcc)

return reference (gcc)

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Compilation time: 0.45 sec, absolute running time: 0.22 sec, cpu time: 0.13 sec, memory peak: 3 Mb, absolute service time: 0,67 sec

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Warning(s):

source_file.cpp: In function ‘const int& func()’:
source_file.cpp:5:25: warning: reference to local variable ‘a’ returned [-Wreturn-local-addr]
 const int& func() { int a=10; return a; }
                         ^

Error(s):

Invalid memory reference (SIGSEGV)

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