src/core/ngx_sha1.c:272: error: Uninitialized Value
  The value read from words[_] was never initialized.

src/core/ngx_sha1.c:272:9: 
270.         STEP(F2, a, b, c, d, e, words[74], 0xca62c1d6);
271.         STEP(F2, a, b, c, d, e, words[75], 0xca62c1d6);
272.         STEP(F2, a, b, c, d, e, words[76], 0xca62c1d6);
             ^
273.         STEP(F2, a, b, c, d, e, words[77], 0xca62c1d6);
274.         STEP(F2, a, b, c, d, e, words[78], 0xca62c1d6);
