It is impossible to use both "debuginfo" and "dynamiclibrary" on a Rule input.

Example :

    Rule {
        inputs: ['dynamiclibrary','debuginfo']
        Artifact {
            filePath: product.installDir+"/"+input.fileName
        }
        prepare: {
            var cmd = new JavaScriptCommand();
            cmd.sourceFile = input.filePath
            cmd.targetFile = output.filePath
            cmd.description = "Copying '" + cmd.sourceFile + "' to '" + cmd.targetFile + "'.";
            cmd.highlight = "codegen";
            cmd.sourceCode = function() {
                File.copy(sourceFile, targetFile);
            }
            return(cmd)
        }
    }

Generates the following error :

:-1: erreur : Conflicting rules for producing D:/path/build-toolsplugin-Release/qtc_Qt_5_7_0_b48a8df6-release/project.qtc-Qt-5-7-0-b48a8df6.88d1d133/project.pdb [debuginfo]
while trying to apply: C:/QtEnterprise/Tools/QtCreator/share/qtcreator/qbs/share/qbs/modules/cpp/windows-msvc.qbs:198:18 [obj] -> [debuginfo]
was already defined in: C:/QtEnterprise/Tools/QtCreator/share/qtcreator/qbs/share/qbs/modules/cpp/windows-msvc.qbs:234:18 [obj] -> [debuginfo]