[llvm-debuginfod-find] Fix test/behavior on Windows.

Author: mysterymath

llvm/lib/Debuginfod/Debuginfod.cpp

@@ -195,15 +195,15 @@ static SmallVector<std::string, 0> getHeaders() {
   uint64_t LineNumber = 0;
   for (StringRef Line : llvm::split((*HeadersFile)->getBuffer(), '\n')) {
     LineNumber++;
+    if (!Line.empty() && Line.back() == '\r')
+      Line = Line.drop_back();
     if (!isHeader(Line)) {
       if (!all_of(Line, llvm::isSpace))
         WithColor::warning()
             << "could not parse debuginfod header: " << Filename << ':'
             << LineNumber << '\n';
       continue;
     }
-    if (Line.back() == '\r')
-      Line = Line.drop_back();
     Headers.emplace_back(Line);
   }
   return Headers;

llvm/test/tools/llvm-debuginfod-find/headers.test

@@ -2,13 +2,13 @@ REQUIRES: curl
 
 RUN: %python %S/Inputs/capture_req.py llvm-debuginfod-find --debuginfo 0 \
 RUN:   | FileCheck --check-prefix NO-HEADERS %s
-RUN: DEBUGINFOD_HEADERS_FILE=bad %python %S/Inputs/capture_req.py \
+RUN: env DEBUGINFOD_HEADERS_FILE=bad %python %S/Inputs/capture_req.py \
 RUN:   llvm-debuginfod-find --debuginfo 0 \
 RUN:   | FileCheck --check-prefix NO-HEADERS %s
-RUN: DEBUGINFOD_HEADERS_FILE=%S/Inputs/headers %python %S/Inputs/capture_req.py \
+RUN: env DEBUGINFOD_HEADERS_FILE=%S/Inputs/headers %python %S/Inputs/capture_req.py \
 RUN:   llvm-debuginfod-find --debuginfo 0 \
 RUN:   | FileCheck --check-prefix HEADERS %s
-RUN: DEBUGINFOD_HEADERS_FILE=%S/Inputs/headers DEBUGINFOD_URLS=fake not llvm-debuginfod-find --debuginfo 0 2>&1 \
+RUN: env DEBUGINFOD_HEADERS_FILE=%S/Inputs/headers DEBUGINFOD_URLS=fake not llvm-debuginfod-find --debuginfo 0 2>&1 \
 RUN:   | FileCheck --check-prefix ERR -DHEADER_FILE=%S/Inputs/headers %s
 
 NO-HEADERS: Accept: */*