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Bug #7074

Updated by Rich Lowe over 4 years ago

The We check whether the brk(2) syscall (via libc's _brk_unlocked) fails.    However, the implementation of _brk_unlocked either fails, or clears the return value.    We need to be able to succeed while returning non-0, for #7030. code, using RETC rather than RET, so it never will. 

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