Index: clang/lib/Format/ContinuationIndenter.cpp
===================================================================
--- clang/lib/Format/ContinuationIndenter.cpp
+++ clang/lib/Format/ContinuationIndenter.cpp
@@ -1437,6 +1437,7 @@
     if (Style.PackConstructorInitializers > FormatStyle::PCIS_BinPack) {
       CurrentState.AvoidBinPacking = true;
       CurrentState.BreakBeforeParameter =
+          Style.ColumnLimit > 0 &&
           Style.PackConstructorInitializers != FormatStyle::PCIS_NextLine &&
           Style.PackConstructorInitializers != FormatStyle::PCIS_NextLineOnly;
     } else {
Index: clang/unittests/Format/FormatTest.cpp
===================================================================
--- clang/unittests/Format/FormatTest.cpp
+++ clang/unittests/Format/FormatTest.cpp
@@ -7758,6 +7758,13 @@
                "    aaaaaaaaaaaaaaaaaaaa(a),\n"
                "    bbbbbbbbbbbbbbbbbbbbb(b) {}",
                Style);
+
+  Style = getLLVMStyleWithColumns(0);
+  Style.PackConstructorInitializers = FormatStyle::PCIS_CurrentLine;
+  verifyFormat("Foo(Bar bar, Baz baz) : bar(bar), baz(baz) {}", Style);
+  verifyNoChange("Foo(Bar bar, Baz baz)\n"
+                 "    : bar(bar), baz(baz) {}",
+                 Style);
 }
 
 TEST_F(FormatTest, AllowAllArgumentsOnNextLine) {