Xcode 8.3.2: File copy fails, but returns false positive

Originator:thedov
Number:rdar://32378084 Date Originated:24-May-2017 11:43 AM
Status:Closed Resolved:Duplicate of 30341932
Product:macOS + SDK Product Version:Xcode 8.3.2 (8E2002)
Classification:Serious Bug Reproducible:Always
 
Summary:
I have unit test code that simulates various error conditions, including unreachable directories. With the latest Xcode and macOS (I upgraded both simultaneously), a file copy operation that has always failed (correctly), still fails, but reports success via a YES return value and a nil NSError.

Steps to Reproduce:
Build and test the attached project

Expected Results:
The unit test passes, indicating a failure to copy a file into a readonly directory, correctly reported as a failure via the API

Actual Results:
The unit test fails, because YES is returned from -[NSFileManager copyItemAtPath:toPath:error:]. No NSError value is returned either

Version:
Xcode 8.3.2 (8E2002)

Notes:
This was working for many prior versions of macOS/Xcode

Comments


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