DEBUG: Trigger bug in icu4c-windows-cygwin-gcc.

icu4c/source/tools/ctestfw/tstdtmod.cpp

diff --git a/icu4c/source/tools/ctestfw/tstdtmod.cpp b/icu4c/source/tools/ctestfw/tstdtmod.cpp
index 66ab79a..5a8e1ef 100644
--- a/icu4c/source/tools/ctestfw/tstdtmod.cpp
+++ b/icu4c/source/tools/ctestfw/tstdtmod.cpp
@@ -18,11 +18,6 @@
 
 TestLog::~TestLog() {}
 
-IcuTestErrorCode::IcuTestErrorCode(TestLog &callingTestClass, const char *callingTestName)
-    : errorCode(U_ZERO_ERROR),
-      testClass(callingTestClass), testName(callingTestName), scopeMessage() {
-}
-
 IcuTestErrorCode::~IcuTestErrorCode() {
     // Safe because our errlog() does not throw exceptions.
     if(isFailure()) {

icu4c/source/tools/ctestfw/unicode/testlog.h

diff --git a/icu4c/source/tools/ctestfw/unicode/testlog.h b/icu4c/source/tools/ctestfw/unicode/testlog.h
index 1b5494b..a5e62e8 100644
--- a/icu4c/source/tools/ctestfw/unicode/testlog.h
+++ b/icu4c/source/tools/ctestfw/unicode/testlog.h
@@ -40,7 +40,9 @@ class T_CTEST_EXPORT_API IcuTestErrorCode {
     IcuTestErrorCode(const IcuTestErrorCode&) = delete;
     IcuTestErrorCode& operator=(const IcuTestErrorCode&) = delete;
 
-    IcuTestErrorCode(TestLog &callingTestClass, const char *callingTestName);
+    IcuTestErrorCode(TestLog &callingTestClass, const char *callingTestName)
+            : errorCode(U_ZERO_ERROR),
+              testClass(callingTestClass), testName(callingTestName), scopeMessage() {}
     virtual ~IcuTestErrorCode();
 
     // ErrorCode API