src/core/ngx_sha1.c:275: error: Uninitialized Value
  The value read from words[_] was never initialized.

src/core/ngx_sha1.c:275:9: 
273.         STEP(F2, a, b, c, d, e, words[77], 0xca62c1d6);
274.         STEP(F2, a, b, c, d, e, words[78], 0xca62c1d6);
275.         STEP(F2, a, b, c, d, e, words[79], 0xca62c1d6);
             ^
276. 
277.         a += saved_a;
