if non-regular file skip trying to grow since we know that will fail …

…the ftruncate syscall

Co-Authored-By: Jameson Nash <vtjnash+github@gmail.com>

stdlib/Mmap/src/Mmap.jl

@@ -86,6 +86,8 @@ grow!(::Anonymous,o::Integer,l::Integer) = return
 function grow!(io::IO, offset::Integer, len::Integer)
     pos = position(io)
     filelen = filesize(io)
+    # If non-regular file skip trying to grow since we know that will fail the ftruncate syscall
+    filelen == 0 && isfile(stat(io)) && return
     if filelen < offset + len
         failure = ccall(:jl_ftruncate, Cint, (Cint, Int64), fd(io), offset+len)
         Base.systemerror(:ftruncate, failure != 0)