| // RUN: not %target-swiftc_driver -debug-prefix-map old %s 2>&1 | %FileCheck %s -check-prefix CHECK-INVALID |
| // RUN: %target-swiftc_driver -### -debug-prefix-map old=new %s 2>&1 | %FileCheck %s -check-prefix CHECK-SIMPLE |
| // RUN: %target-swiftc_driver -### -debug-prefix-map old=n=ew %s 2>&1 | %FileCheck %s -check-prefix CHECK-COMPLEX |
| // RUN: %target-swiftc_driver -### -debug-prefix-map old= %s 2>&1 | %FileCheck %s -check-prefix CHECK-EMPTY |
| |
| // CHECK-INVALID: error: invalid argument 'old' to -debug-prefix-map |
| // CHECK-SIMPLE: debug-prefix-map old=new |
| // CHECK-COMPLEX: debug-prefix-map old=n=ew |
| // CHECK-EMPTY: debug-prefix-map old= |
