isWritable gets error rather than returning false when file is in inaccessible directory

[ericwinger]

If I send

'/root/RowanClientServices.gs' asFileReference isWritable

to a path I don't have access to, I should get false rather than an error.

a FsEACCES occurred (error 2771)

2025-02-05_89488978_rowanServerStackDump.txt