Don't lint during SuggestedFixes#compilesWithFix

Under certain circumstances this avoids triggering a compiler bug. It is
also expected to speed up the trial compilation somewhat. The implicit
assumption here is that it is okay to suggest a fix which introduces
another warning. (This may not be so in general, but the introduced
warning may be less severe or may be resolved manually.)

See google#849.

check_api/src/main/java/com/google/errorprone/fixes/SuggestedFixes.java

@@ -1286,6 +1286,17 @@ public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOExcept
         // but does add them in response to passing --release. Here we invert that operation.
         continue;
       }
+      if (key.equals("-Xlint")
+          || key.equals("-Xlint:")
+          || key.equals("-Xdoclint")
+          || key.equals("-Xdoclint:")
+          || key.equals("-Xdoclint/package:")
+          || key.equals("--doclint-format")) {
+        // For unknown reasons retaining -Xdoclint:reference here can cause an NPE; see #849. Since
+        // suggested fixes are unlikely to introduce lint errors that cannot be fixed manually, here
+        // we disable all lint checks. This _may_ also speed up compilation.
+        continue;
+      }
       options.put(key, value);
     }
     JavacTask newTask =