R Under development (unstable) (2024-09-04 r87094 ucrt) -- "Unsuffered Consequences"
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> library(sp)
> 
> data(meuse)
> data(meuse.grid)
> 
> set.seed(13131) # reproduce results
> 
> # select 10 random rows;
> # create two missing values in the coordinates:
> m = meuse.grid[sample(nrow(meuse.grid), 10), ]
> m[c(2,8), "x"] = NA
> 
> library(gstat)
> ## this is not allowed anymore:
> try(krige(log(zinc)~1,~x+y,meuse,m, na.action = na.pass))
Error in na.fail.default(structure(list(x = c(179220, NA, 178740, 179300,  : 
  missing values in object
> try(krige(log(zinc)~1,~x+y,meuse,m, na.action = na.omit))
Error in na.fail.default(structure(list(x = c(179220, NA, 178740, 179300,  : 
  missing values in object
> try(krige(log(zinc)~1,~x+y,meuse,m, na.action = na.exclude))
Error in na.fail.default(structure(list(x = c(179220, NA, 178740, 179300,  : 
  missing values in object
> try(krige(log(zinc)~1,~x+y,meuse,m, na.action = na.fail))
Error in na.fail.default(structure(list(x = c(179220, NA, 178740, 179300,  : 
  missing values in object
> 
> # select 10 random rows;
> # create two missing values in the regressor variable:
> m = meuse.grid[sample(nrow(meuse.grid), 10), ]
> m[c(3,7), "dist"] = NA
> krige(log(zinc)~dist,~x+y,meuse,m, na.action = na.pass)
[ordinary or weighted least squares prediction]
        x      y var1.pred  var1.var
1  178860 330860  6.530134 0.2415196
2  180260 331860  5.389567 0.2406041
3  180100 331860        NA        NA
4  180460 331820  5.213370 0.2417197
5  179660 330580  5.550859 0.2398778
6  179740 330300  6.108648 0.2395392
7  180220 330660        NA        NA
8  178580 329820  6.533801 0.2415453
9  180100 331900  5.580264 0.2397758
10 180780 331900  5.095967 0.2426499
> krige(log(zinc)~dist,~x+y,meuse,m, na.action = na.omit)
[ordinary or weighted least squares prediction]
          x      y var1.pred  var1.var
1877 178860 330860  6.530134 0.2415196
1015 180260 331860  5.389567 0.2406041
1056 180460 331820  5.213370 0.2417197
2199 179660 330580  5.550859 0.2398778
2556 179740 330300  6.108648 0.2395392
2985 178580 329820  6.533801 0.2415453
975  180100 331900  5.580264 0.2397758
992  180780 331900  5.095967 0.2426499
> krige(log(zinc)~dist,~x+y,meuse,m, na.action = na.exclude)
[ordinary or weighted least squares prediction]
          x      y var1.pred  var1.var
1877 178860 330860  6.530134 0.2415196
1015 180260 331860  5.389567 0.2406041
1056 180460 331820  5.213370 0.2417197
2199 179660 330580  5.550859 0.2398778
2556 179740 330300  6.108648 0.2395392
2985 178580 329820  6.533801 0.2415453
975  180100 331900  5.580264 0.2397758
992  180780 331900  5.095967 0.2426499
> try(krige(log(zinc)~dist,~x+y,meuse,m, na.action = na.fail))
Error in na.fail.default(structure(list(dist = c(0.00135803, 0.423804,  : 
  missing values in object
> 
> proc.time()
   user  system elapsed 
   1.06    0.14    1.17