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xread may return -1.
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@ -414,7 +414,7 @@ static bool ProcessList_readStatFile(Process *process, const char* dirname, cons
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int size = xread(fd, buf, MAX_READ);
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close(fd);
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if (!size) return false;
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if (size <= 0) return false;
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buf[size] = '\0';
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assert(process->pid == atoi(buf));
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