test/bntest.c:1795: error: INTEGER_OVERFLOW_L2
  ([0, +oo] - 1):unsigned32 by call to `BN_mul`.
Showing all 10 steps of the trace


test/bntest.c:1795:10: Call
1793.       BN_set_negative(a, 1);
1794.       BN_zero(b);
1795.       if (!TEST_true(BN_mul(c, a, b, ctx)))
                 ^
1796.           goto err;
1797.       if (!TEST_BN_eq_zero(c)

crypto/bn/bn_mul.c:495:1: Parameter `ctx->stack.depth`
  493.   #endif                          /* BN_RECURSION */
  494.   
  495. > int BN_mul(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
  496.   {
  497.       int ret = 0;

crypto/bn/bn_mul.c:521:5: Call
  519.       top = al + bl;
  520.   
  521.       BN_CTX_start(ctx);
             ^
  522.       if ((r == a) || (r == b)) {
  523.           if ((rr = BN_CTX_get(ctx)) == NULL)

crypto/bn/bn_ctx.c:181:1: Parameter `ctx->stack.depth`
    179.   }
    180.   
    181. > void BN_CTX_start(BN_CTX *ctx)
    182.   {
    183.       CTXDBG_ENTRY("BN_CTX_start", ctx);

crypto/bn/bn_mul.c:646:5: Call
  644.    err:
  645.       bn_check_top(r);
  646.       BN_CTX_end(ctx);
             ^
  647.       return (ret);
  648.   }

crypto/bn/bn_ctx.c:195:1: Parameter `ctx->stack.depth`
    193.   }
    194.   
    195. > void BN_CTX_end(BN_CTX *ctx)
    196.   {
    197.       CTXDBG_ENTRY("BN_CTX_end", ctx);

crypto/bn/bn_ctx.c:201:27: Call
    199.           ctx->err_stack--;
    200.       else {
    201.           unsigned int fp = BN_STACK_pop(&ctx->stack);
                                     ^
    202.           /* Does this stack frame have anything to release? */
    203.           if (fp < ctx->used)

crypto/bn/bn_ctx.c:271:1: <LHS trace>
269.   }
270.   
271. > static unsigned int BN_STACK_pop(BN_STACK *st)
272.   {
273.       return st->indexes[--(st->depth)];

crypto/bn/bn_ctx.c:271:1: Parameter `st->depth`
      269.   }
      270.   
      271. > static unsigned int BN_STACK_pop(BN_STACK *st)
      272.   {
      273.       return st->indexes[--(st->depth)];

crypto/bn/bn_ctx.c:273:12: Binary operation: ([0, +oo] - 1):unsigned32 by call to `BN_mul` 
      271.   static unsigned int BN_STACK_pop(BN_STACK *st)
      272.   {
      273.       return st->indexes[--(st->depth)];
                        ^
      274.   }
      275.   
