|  | ## Test regular archives do not convert to thin archives | 
|  | ## in the special case of replacing a single file in an | 
|  | ## archive with itself from the current directory. | 
|  |  | 
|  | # RUN: rm -rf %t && mkdir -p %t && cd %t | 
|  | # RUN: echo "a" > a.txt | 
|  | # RUN: llvm-ar --format=gnu cr foo.a a.txt 2>&1 | 
|  |  | 
|  | ## Check that an error is issued. | 
|  | # RUN: not llvm-ar --format=gnu cr --thin foo.a a.txt 2>&1 | FileCheck %s | 
|  | # CHECK: error: cannot convert a regular archive to a thin one | 
|  |  | 
|  | ## Check that the archive is still the correct flavor. | 
|  | # RUN: FileCheck --input-file=foo.a %s --check-prefix=REGULAR | 
|  | # REGULAR: !<arch> |