Mosaic fails since 1.7.39 (at least)

[Jean-Romain]

The following MRE is working with 1.7.29 but returns incorrect output with 1.7.39

library(terra)

x1 <- rast(xmin=-110, xmax=-60, ymin=40, ymax=70, res=1, vals=1)
x2 <- rast(xmin=-110, xmax=-60, ymin=40, ymax=70, res=1, vals=2)
x  <- c(x1, x2)

y1 <- rast(xmin=-95, xmax=-45, ymax=60, ymin=30, res=1, vals=3)
y2 <- rast(xmin=-95, xmax=-45, ymax=60, ymin=30, res=1, vals=4)
y  <- c(y1, y2)

m1 <- mosaic(x, y)
m1

1.7.29

class       : SpatRaster 
dimensions  : 40, 65, 2  (nrow, ncol, nlyr)
resolution  : 1, 1  (x, y)
extent      : -110, -45, 30, 70  (xmin, xmax, ymin, ymax)
coord. ref. : lon/lat WGS 84 
source(s)   : memory
names       : lyr.1, lyr.1 
min values  :     1,     2 
max values  :     3,     4 

1.7.39

class       : SpatRaster 
dimensions  : 40, 65, 2  (nrow, ncol, nlyr)
resolution  : 1, 1  (x, y)
extent      : -110, -45, 30, 70  (xmin, xmax, ymin, ymax)
coord. ref. : lon/lat WGS 84 
source(s)   : memory
names       : lyr.1, lyr.1 
min values  :   1.5,   1.5 
max values  :   3.5,   3.5 

[rhijmans]

Thanks very much for reporting this ugly bug. Fixed now, but I am not closing this issue yet as I want to look at this a bit more.