Index: llvm/trunk/lib/DebugInfo/DWARF/DWARFDebugLine.cpp
===================================================================
--- llvm/trunk/lib/DebugInfo/DWARF/DWARFDebugLine.cpp
+++ llvm/trunk/lib/DebugInfo/DWARF/DWARFDebugLine.cpp
@@ -554,9 +554,10 @@
         if (DebugLineData.getAddressSize() == 0)
           DebugLineData.setAddressSize(Len - 1);
         else if (DebugLineData.getAddressSize() != Len - 1) {
-          fprintf(stderr, "Mismatching address size at offset 0x%8.8" PRIx32
-                  " expected 0x%2.2" PRIx8 " found 0x%2.2" PRIx64 "\n",
-                  ExtOffset, DebugLineData.getAddressSize(), Len - 1);
+          WithColor::warning()
+              << format("mismatching address size at offset 0x%8.8" PRIx32
+                        " expected 0x%2.2" PRIx8 " found 0x%2.2" PRIx64 "\n",
+                        ExtOffset, DebugLineData.getAddressSize(), Len - 1);
           // Skip the rest of the line-number program.
           *OffsetPtr = EndOffset;
           return false;
@@ -621,9 +622,10 @@
       // Make sure the stated and parsed lengths are the same.
       // Otherwise we have an unparseable line-number program.
       if (*OffsetPtr - ExtOffset != Len) {
-        fprintf(stderr, "Unexpected line op length at offset 0x%8.8" PRIx32
-                " expected 0x%2.2" PRIx64 " found 0x%2.2" PRIx32 "\n",
-                ExtOffset, Len, *OffsetPtr - ExtOffset);
+        WithColor::warning()
+            << format("unexpected line op length at offset 0x%8.8" PRIx32
+                      " expected 0x%2.2" PRIx64 " found 0x%2.2" PRIx32 "\n",
+                      ExtOffset, Len, *OffsetPtr - ExtOffset);
         // Skip the rest of the line-number program.
         *OffsetPtr = EndOffset;
         return false;
Index: llvm/trunk/test/DebugInfo/X86/dwarfdump-bogus-LNE.s
===================================================================
--- llvm/trunk/test/DebugInfo/X86/dwarfdump-bogus-LNE.s
+++ llvm/trunk/test/DebugInfo/X86/dwarfdump-bogus-LNE.s
@@ -148,7 +148,7 @@
         .byte   1               # DW_LNE_end_sequence
 LT2_end:
 
-# ERR:      Unexpected line op length at offset 0x0000005e
+# ERR:      warning: unexpected line op length at offset 0x0000005e
 # ERR-SAME: expected 0x02 found 0x01
 
 # The above parsing errors still let us move to the next unit.
Index: llvm/trunk/test/DebugInfo/X86/dwarfdump-line-mismatch.s
===================================================================
--- llvm/trunk/test/DebugInfo/X86/dwarfdump-line-mismatch.s
+++ llvm/trunk/test/DebugInfo/X86/dwarfdump-line-mismatch.s
@@ -4,7 +4,7 @@
 # RUN: llvm-mc -filetype=obj -triple i686-linux-gnu %s -o - | \
 # RUN: llvm-dwarfdump -debug-line - 2>&1 | FileCheck %s
 
-# CHECK: Mismatching address size at offset 0x{{[0-9a-f]+}}
+# CHECK:      warning: mismatching address size at offset 0x{{[0-9a-f]+}}
 # CHECK-SAME: expected 0x08 found 0x04
 	.text
 	.file	"reduced.c"