crypto/ec/ec2_oct.c:280: error: INTEGER_OVERFLOW_L2
  ([0, +oo] - 1):unsigned32 by call to `BN_CTX_end`.
Showing all 7 steps of the trace


crypto/ec/ec2_oct.c:173:1: Parameter `ctx->pool.used`
171.    * an error will be returned.
172.    */
173. > size_t ec_GF2m_simple_point2oct(const EC_GROUP *group, const EC_POINT *point,
174.                                   point_conversion_form_t form,
175.                                   unsigned char *buf, size_t len, BN_CTX *ctx)

crypto/ec/ec2_oct.c:280:9: Call
278.   
279.       if (used_ctx)
280.           BN_CTX_end(ctx);
               ^
281.       if (new_ctx != NULL)
282.           BN_CTX_free(new_ctx);

crypto/bn/bn_ctx.c:267:1: Parameter `ctx->pool.used`
  265.   }
  266.   
  267. > void BN_CTX_end(BN_CTX *ctx)
  268.   {
  269.       CTXDBG_ENTRY("BN_CTX_end", ctx);

crypto/bn/bn_ctx.c:276:13: Call
  274.           /* Does this stack frame have anything to release? */
  275.           if (fp < ctx->used)
  276.               BN_POOL_release(&ctx->pool, ctx->used - fp);
                     ^
  277.           ctx->used = fp;
  278.           /* Unjam "too_many" in case "get" had failed */

crypto/bn/bn_ctx.c:435:1: <LHS trace>
433.   }
434.   
435. > static void BN_POOL_release(BN_POOL *p, unsigned int num)
436.   {
437.       unsigned int offset = (p->used - 1) % BN_CTX_POOL_SIZE;

crypto/bn/bn_ctx.c:435:1: Parameter `p->used`
    433.   }
    434.   
    435. > static void BN_POOL_release(BN_POOL *p, unsigned int num)
    436.   {
    437.       unsigned int offset = (p->used - 1) % BN_CTX_POOL_SIZE;

crypto/bn/bn_ctx.c:437:5: Binary operation: ([0, +oo] - 1):unsigned32 by call to `BN_CTX_end` 
    435.   static void BN_POOL_release(BN_POOL *p, unsigned int num)
    436.   {
    437.       unsigned int offset = (p->used - 1) % BN_CTX_POOL_SIZE;
               ^
    438.       p->used -= num;
    439.       while (num--) {
