ADDITIONAL SYSTEM INFORMATION :
OS: Mac OS X 10.14.2 
java version "11.0.1" 2018-10-16 LTS
Java(TM) SE Runtime Environment 18.9 (build 11.0.1+13-LTS)
Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.1+13-LTS, mixed mode)


A DESCRIPTION OF THE PROBLEM :
JavaFX 11.0.1: All True Type Collection Fonts (*.ttc) don't display bold or italic when the style is set to "-fx-font-weight: bold;" or "-fx-font-style: italic;".
Other font implementations, i.e. *.ttf, work as expected.
This is a regression from java version 1.8.0_191.
The same problem happens on Fedora29 but not on Windows 10.



REGRESSION : Last worked in version 8u192

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Create  a new javafx.scene.text.Text element.
Set the style to a font implemented as a True Type Collection font. i.e. *.ttc, such as Helvetica  on Mac OS X with "-fx-font-family: Helvetica;".
Also set the font weight to bold with "-fx-font-weight: bold;" or to italic with "-fx-font-style: italic;" and the text will be displayed as normal. i.e. not bold or italic.


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Text should be displayed as bold or italic.
ACTUAL -
Text is displayed as normal.

---------- BEGIN SOURCE ----------
package org.fontbugfx8;

import java.util.List;
import javafx.application.Application;
import javafx.scene.layout.VBox;
import javafx.scene.text.Font;
import javafx.scene.text.Text;
import javafx.scene.text.TextFlow;
import javafx.scene.Scene;
import javafx.stage.Stage;


public class MainApp extends Application {

    private TextFlow info() {
        String osInfo = System.getProperty("os.name") + " version: " + System.getProperty("os.version");
        String javaVersion = "Java version: " + System.getProperty("java.version");
        Text textInfo = new Text(osInfo + " " + javaVersion);
        textInfo.setStyle("-fx-font-size: 24px;-fx-fill: #0072c6;");
        TextFlow textFlow = new TextFlow(textInfo);
        textFlow.setPrefHeight(48);
        textFlow.setStyle("-fx-margin: 10px 0 0 0;");
        return textFlow;
    }

    private TextFlow title(String title) {
        Text ttfFonts = new Text(title);
        ttfFonts.setStyle("-fx-font-size: 24px;-fx-underline: true;");
        TextFlow textFlow = new TextFlow(ttfFonts);
        textFlow.setPrefHeight(48);
        return textFlow;
    }

    private TextFlow addFontFamily(String fontFamily) {
        List<String> fonts = Font.getFontNames(fontFamily);
        if (fonts.isEmpty()) { // Font is missing
            Text fontMissing = new Text("Font: \"" + fontFamily + "\" is missing");
            fontMissing.setStyle("-fx-font-size: 20px;-fx-fill: red;");
            TextFlow textFlow = new TextFlow(fontMissing);
            textFlow.setPrefHeight(40);
            return textFlow;
        }
        else {
            String fontStyle = "-fx-font-family: " + fontFamily + ";-fx-font-size: 20px;";
            Text textNormal = new Text(fontFamily + ": normal");
            textNormal.setStyle(fontStyle + "-fx-font-weight: normal;");
            Text textBold = new Text(" bold");
            textBold.setStyle(fontStyle + "-fx-font-weight: bold;");
            Text textItalic = new Text(" italic");
            textItalic.setStyle(fontStyle + "-fx-font-style: italic;");
            TextFlow textFlow = new TextFlow(textNormal, textBold, textItalic);
            textFlow.setPrefHeight(40);
            return textFlow;
        }
    }

    @Override
    public void start(Stage stage) {
        VBox view = new VBox();
        view.setStyle("-fx-padding: 0 0 0 10px;");
        Scene scene = new Scene(view);
        stage.setMinWidth(800);
        stage.setMinHeight(800);
        stage.setTitle("JavaFX 1.8 .ttc fonts work");
        stage.setScene(scene);
//
        view.getChildren().add(info());
//
        view.getChildren().add(title("Test missing font check works"));
        view.getChildren().add(addFontFamily("Uknown"));
//
        view.getChildren().add(title("Test JavaFX 1.8 .ttf fonts: shows bold and italic"));
        view.getChildren().add(addFontFamily("Arial"));
        view.getChildren().add(addFontFamily("Courier new"));
        view.getChildren().add(addFontFamily("Georgia"));
        view.getChildren().add(addFontFamily("Tahoma"));
        view.getChildren().add(addFontFamily("Verdana"));
//
        view.getChildren().add(title("Test JavaFX 1.8 .ttc fonts bug: shows bold and italic"));
        view.getChildren().add(addFontFamily("Helvetica"));
        view.getChildren().add(addFontFamily("Helvetica Neue"));
        view.getChildren().add(addFontFamily("Lucida Grande"));
        view.getChildren().add(addFontFamily("Menlo"));
        view.getChildren().add(addFontFamily("Times New Roman"));
//
        stage.show();
    }

    public static void main(String[] args) {
        launch(MainApp.class);
    }

}

---------- END SOURCE ----------

FREQUENCY : always