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Date: Mon, 4 May 2015 20:38:10 +0800
From: Kai Zhao <>
Subject: External problem


I found a bug using asan when "--external=LanMan". But magnum
and I are not sure whether it is really a bug. So could you help me
to solve this problem?

The problem is described here:

I think it is really a bug, since there is the case that it tries to visit
(sp-2)  when sp points to c_stack[0].

void c_execute_fast(void *addr)
        union c_insn *pc = addr;
        union c_insn *sp = c_stack;
        c_int imm = 0;
        (sp - 2)->imm = imm;
        imm = *((sp + 1)->mem = pc->mem);
        pc += 2;
        sp += 2;
        goto *(pc - 1)->op;



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