| # RUN: yaml2obj < %s > %t.obj | 
 | # RUN: not lld-link /out:%t.exe /entry:main %t.obj >& %t.log | 
 | # RUN: FileCheck -check-prefix=ERROR %s < %t.log | 
 | # RUN: lld-link /out:%t.exe /entry:main %t.obj /force >& %t.log | 
 | # RUN: FileCheck -check-prefix=WARN %s < %t.log | 
 |  | 
 | # ERROR: error: undefined symbol: foo | 
 | # ERROR-NEXT: >>> referenced by {{.*}}.obj | 
 | # WARN: warning: undefined symbol: foo | 
 | # WARN-NEXT: >>> referenced by {{.*}}.obj | 
 |  | 
 | --- !COFF | 
 | header: | 
 |   Machine:         IMAGE_FILE_MACHINE_AMD64 | 
 |   Characteristics: [] | 
 | sections: | 
 |   - Name:            .text | 
 |     Characteristics: [ IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ ] | 
 |     Alignment:       4 | 
 |     SectionData:     000000000000 | 
 | symbols: | 
 |   - Name:            .text | 
 |     Value:           0 | 
 |     SectionNumber:   1 | 
 |     SimpleType:      IMAGE_SYM_TYPE_NULL | 
 |     ComplexType:     IMAGE_SYM_DTYPE_NULL | 
 |     StorageClass:    IMAGE_SYM_CLASS_STATIC | 
 |     SectionDefinition: | 
 |       Length:          6 | 
 |       NumberOfRelocations: 0 | 
 |       NumberOfLinenumbers: 0 | 
 |       CheckSum:        0 | 
 |       Number:          0 | 
 |   - Name:            main | 
 |     Value:           0 | 
 |     SectionNumber:   1 | 
 |     SimpleType:      IMAGE_SYM_TYPE_NULL | 
 |     ComplexType:     IMAGE_SYM_DTYPE_NULL | 
 |     StorageClass:    IMAGE_SYM_CLASS_EXTERNAL | 
 |   - Name:            foo | 
 |     Value:           0 | 
 |     SectionNumber:   0 | 
 |     SimpleType:      IMAGE_SYM_TYPE_NULL | 
 |     ComplexType:     IMAGE_SYM_DTYPE_NULL | 
 |     StorageClass:    IMAGE_SYM_CLASS_EXTERNAL | 
 | ... |