Hacktoberfest 2026 : les issues que les mainteneurs ont marquées pour octobre, ouvertes et accessibles aux débutants. Parcourir les issues Hacktoberfest

IndexOutOfBoundsException - Wrong formatted content when dealing with latex String

Ouverte
#1,439 1 commentaire 0 réactions 0 personnes assignées Voir sur GitHub

Les mainteneurs répondent en général sous 1 jour

@Amlan2000 y travaille déjà.

Depuis le 15/8/2026.

Évaluation

Difficulté
4/5
Temps estimé
3-5 jours
Accessibilité débutants
55/100
Type d'issue
Bug
Clarté
Plutôt claire
Activité
Calme
Stack technique
java
Domaine
tooling

Piste de recherche

Reproduisez l’échec avec la classe Java fournie, puis examinez StringWrapper#applyReplacements et FormatterException#formatDiagnostics. Vérifiez le code source généré et le traitement de la ligne de diagnostic par rapport à l’entrée d’origine. La tâche est terminée lorsque le formatage ne produit plus de code Java non compilable et que le formateur signale l’erreur sans IndexOutOfBoundsException.

Rédigé par le modèle d'indexation à partir du texte de l'issue.

Description

Give this class

package question;

class T {

  private static final String JSON =
      "{\n"
          + "  \"a\": \"AAAAA AAA AAA AAA AA AAA AA AAAAA AA AAAAA AAA AAAA AAAA AA AAAA AAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAAA AAAAAA AAAAA AAA at $-15.4{^{\\\\,\\\\circ}\\\\text{C}}$ BBB BBBBB BB BBB $42.7{^{\\\\,\\\\circ}\\\\text{C}}$?\\n\\n(CC CC CCC CC CCCCC CCC CCC CCC CCC CCC CC = $1.95\\\\;{\\\\text{J}/\\\\text{g}\\\\cdot{^{\\\\circ}\\\\text{C}}}$; DDD DDD DDDD DDDD DDDDD DDDD DDD DD DDDD = $1.18\\\\;{\\\\text{J}/\\\\text{g}\\\\cdot{^{\\\\circ}\\\\text{C}}}$C; $\\\\Delta H_\\\\text{fus}$ = 5.72 kJ/mol; normal freezing point, $T_f$ = $28.3{^{\\\\,\\\\circ}\\\\text{C}}$)\",\n"
          + "  \"b\": \"*EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EEE.*\\n\\nFF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F $-15.4^\\\\circ\\\\text C$ to $28.3^\\\\circ\\\\text C$.\\n\\\\[q=mc\\\\Delta T=(10.1\\\\;\\\\mathrm{g})(1.95\\\\;\\\\mathrm{J/g\\\\cdot °C})(28.3\\\\;\\\\mathrm{ °C}-(-15.4)\\\\;\\\\mathrm{ °C})=860.6715\\\\;\\\\mathrm{J} \\\\]\\n\\nGG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GGGGGGGGGGGGGGGGGGGGG.\\n\\\\[q=nH_{fus}=(\\\\frac{10.1\\\\;\\\\mathrm{g}}{67.44\\\\;\\\\mathrm{g/mol}})(5720\\\\;\\\\mathrm{J})=856.6429\\\\;\\\\mathrm{J}\\\\]\\n\\nHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH $28.3^\\\\circ\\\\text C$ to $42.7^\\\\circ\\\\text C$.\\n\\\\[q=mc\\\\Delta T=(10.1\\\\;\\\\mathrm{g})(1.18\\\\;\\\\mathrm{J/g\\\\cdot °C})(42.7\\\\;\\\\mathrm{ °C}-28.3\\\\;\\\\mathrm{ °C})=171.6192\\\\;\\\\mathrm{J}\\\\]\\n\\nIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII.\\n\\\\[860.6715\\\\;\\\\mathrm{J}+856.6429\\\\;\\\\mathrm{J}+171.6192\\\\;\\\\mathrm{J}=1888.9336\\\\;\\\\mathrm{J}=1.89\\\\;\\\\mathrm{kJ}\\\\]\",\n"
          + "}";

  private static final String JSON2 =
      "{\n"
          + "  \"a\": \"AAAAA AAA AAA AAA AA AAA AA AAAAA AA AAAAA AAA AAAA AAAA AA AAAA AAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAAA AAAAAA AAAAA AAA at $-15.4{^{\\\\,\\\\circ}\\\\text{C}}$ BBB BBBBB BB BBB $42.7{^{\\\\,\\\\circ}\\\\text{C}}$?\\n\\n(CC CC CCC CC CCCCC CCC CCC CCC CCC CCC CC = $1.95\\\\;{\\\\text{J}/\\\\text{g}\\\\cdot{^{\\\\circ}\\\\text{C}}}$; DDD DDD DDDD DDDD DDDDD DDDD DDD DD DDDD = $1.18\\\\;{\\\\text{J}/\\\\text{g}\\\\cdot{^{\\\\circ}\\\\text{C}}}$C; $\\\\Delta H_\\\\text{fus}$ = 5.72 kJ/mol; normal freezing point, $T_f$ = $28.3{^{\\\\,\\\\circ}\\\\text{C}}$)\",\n"
          + "  \"b\": \"*EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EEE.*\\n\\nFF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F $-15.4^\\\\circ\\\\text C$ to $28.3^\\\\circ\\\\text C$.\\n\\\\[q=mc\\\\Delta T=(10.1\\\\;\\\\mathrm{g})(1.95\\\\;\\\\mathrm{J/g\\\\cdot °C})(28.3\\\\;\\\\mathrm{ °C}-(-15.4)\\\\;\\\\mathrm{ °C})=860.6715\\\\;\\\\mathrm{J} \\\\]\\n\\nGG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GGGGGGGGGGGGGGGGGGGGG.\\n\\\\[q=nH_{fus}=(\\\\frac{10.1\\\\;\\\\mathrm{g}}{67.44\\\\;\\\\mathrm{g/mol}})(5720\\\\;\\\\mathrm{J})=856.6429\\\\;\\\\mathrm{J}\\\\]\\n\\nHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH $28.3^\\\\circ\\\\text C$ to $42.7^\\\\circ\\\\text C$.\\n\\\\[q=mc\\\\Delta T=(10.1\\\\;\\\\mathrm{g})(1.18\\\\;\\\\mathrm{J/g\\\\cdot °C})(42.7\\\\;\\\\mathrm{ °C}-28.3\\\\;\\\\mathrm{ °C})=171.6192\\\\;\\\\mathrm{J}\\\\]\\n\\nIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII.\\n\\\\[860.6715\\\\;\\\\mathrm{J}+856.6429\\\\;\\\\mathrm{J}+171.6192\\\\;\\\\mathrm{J}=1888.9336\\\\;\\\\mathrm{J}=1.89\\\\;\\\\mathrm{kJ}\\\\]\",\n"
          + "}";

  public static void main(String[] args) {
    System.out.println(JSON);
  }

}

I ran the main method to ensure it is valid java source code
Image

But when trying to format it using GJF, I got

Exception in thread "main" java.lang.IndexOutOfBoundsException: Index 42 out of bounds for length 22
	at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:100)
	at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:106)
	at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:302)
	at java.base/java.util.Objects.checkIndex(Objects.java:385)
	at java.base/java.util.ArrayList.get(ArrayList.java:427)
	at java.base/java.util.Collections$UnmodifiableList.get(Collections.java:1502)
	at com.google.googlejavaformat.java.FormatterException.formatDiagnostics(FormatterException.java:70)
	at com.google.googlejavaformat.java.Main.formatFiles(Main.java:177)
	at com.google.googlejavaformat.java.Main.format(Main.java:128)
	at com.google.googlejavaformat.java.Main.main(Main.java:91)
	at com.google.googlejavaformat.java.Main.main(Main.java:81)
	at com.google.googlejavaformat.java.Main.main(Main.java:70)

Digging into the GJF, I found 2 issues:

  1. The com.google.googlejavaformat.java.StringWrapper#applyReplacements give wrong result:
package question;

class T {

  private static final String JSON =
      "{\n"
          + "  \"a\": \"AAAAA AAA AAA AAA AA AAA AA AAAAA AA AAAAA AAA AAAA AAAA AA AAAA AAAA AAAAA"
          + " AAAAA AAAAA AAAAA AAAAAA AAAAA AAAAAA AAAAA AAA at $-15.4{^{\\\\,\\\\circ}\\\"
          + "\text{C}}$ BBB BBBBB BB BBB $42.7{^{\\\\,\\\\circ}\\\\text{C}}$?\\n"
          + "\\n"
          + "(CC CC CCC CC CCCCC CCC CCC CCC CCC CCC CC = $1.95\\\\;{\\\\text{J}/\\\"
          + "\text{g}\\\\cdot{^{\\\\circ}\\\\text{C}}}$; DDD DDD DDDD DDDD DDDDD DDDD DDD DD DDDD ="
          + " $1.18\\\\;{\\\\text{J}/\\\\text{g}\\\\cdot{^{\\\\circ}\\\\text{C}}}$C; $\\\\Delta"
          + " H_\\\\text{fus}$ = 5.72 kJ/mol; normal freezing point, $T_f$ ="
          + " $28.3{^{\\\\,\\\\circ}\\\\text{C}}$)\",\n"
          + "  \"b\": \"*EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE"
          + " EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE"
          + " EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EEE.*\\n"
          + "\\n"
          + "FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F"
          + " $-15.4^\\\\circ\\\\text C$ to $28.3^\\\\circ\\\\text C$.\\n"
          + "\\\\[q=mc\\\\Delta T=(10.1\\\\;\\\\mathrm{g})(1.95\\\\;\\\\mathrm{J/g\\\\cdot"
          + " °C})(28.3\\\\;\\\\mathrm{ °C}-(-15.4)\\\\;\\\\mathrm{ °C})=860.6715\\\\;\\\\mathrm{J}"
          + " \\\\]\\n"
          + "\\n"
          + "GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG"
          + " GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GGGGGGGGGGGGGGGGGGGGG.\\n"
          + "\\\\[q=nH_{fus}=(\\\\frac{10.1\\\\;\\\\mathrm{g}}{67.44\\\\;\\\\mathrm{g/mol}})(5720\\\\;\\\\mathrm{J})=856.6429\\\\;\\\\mathrm{J}\\\\]\\n"
          + "\\n"
          + "HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH $28.3^\\\\circ\\\\text C$ to"
          + " $42.7^\\\\circ\\\\text C$.\\n"
          + "\\\\[q=mc\\\\Delta T=(10.1\\\\;\\\\mathrm{g})(1.18\\\\;\\\\mathrm{J/g\\\\cdot"
          + " °C})(42.7\\\\;\\\\mathrm{ °C}-28.3\\\\;\\\\mathrm{"
          + " °C})=171.6192\\\\;\\\\mathrm{J}\\\\]\\n"
          + "\\n"
          + "IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII.\\n"
          + "\\\\[860.6715\\\\;\\\\mathrm{J}+856.6429\\\\;\\\\mathrm{J}+171.6192\\\\;\\\\mathrm{J}=1888.9336\\\\;\\\\mathrm{J}=1.89\\\\;\\\\mathrm{kJ}\\\\]\",\n"
          + "}";

  private static final String JSON2 =
      "{\n"
          + "  \"a\": \"AAAAA AAA AAA AAA AA AAA AA AAAAA AA AAAAA AAA AAAA AAAA AA AAAA AAAA AAAAA"
          + " AAAAA AAAAA AAAAA AAAAAA AAAAA AAAAAA AAAAA AAA at $-15.4{^{\\\\,\\\\circ}\\\"
          + "\text{C}}$ BBB BBBBB BB BBB $42.7{^{\\\\,\\\\circ}\\\\text{C}}$?\\n"
          + "\\n"
          + "(CC CC CCC CC CCCCC CCC CCC CCC CCC CCC CC = $1.95\\\\;{\\\\text{J}/\\\"
          + "\text{g}\\\\cdot{^{\\\\circ}\\\\text{C}}}$; DDD DDD DDDD DDDD DDDDD DDDD DDD DD DDDD ="
          + " $1.18\\\\;{\\\\text{J}/\\\\text{g}\\\\cdot{^{\\\\circ}\\\\text{C}}}$C; $\\\\Delta"
          + " H_\\\\text{fus}$ = 5.72 kJ/mol; normal freezing point, $T_f$ ="
          + " $28.3{^{\\\\,\\\\circ}\\\\text{C}}$)\",\n"
          + "  \"b\": \"*EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE"
          + " EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE"
          + " EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EEE.*\\n"
          + "\\n"
          + "FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F"
          + " $-15.4^\\\\circ\\\\text C$ to $28.3^\\\\circ\\\\text C$.\\n"
          + "\\\\[q=mc\\\\Delta T=(10.1\\\\;\\\\mathrm{g})(1.95\\\\;\\\\mathrm{J/g\\\\cdot"
          + " °C})(28.3\\\\;\\\\mathrm{ °C}-(-15.4)\\\\;\\\\mathrm{ °C})=860.6715\\\\;\\\\mathrm{J}"
          + " \\\\]\\n"
          + "\\n"
          + "GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG"
          + " GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GGGGGGGGGGGGGGGGGGGGG.\\n"
          + "\\\\[q=nH_{fus}=(\\\\frac{10.1\\\\;\\\\mathrm{g}}{67.44\\\\;\\\\mathrm{g/mol}})(5720\\\\;\\\\mathrm{J})=856.6429\\\\;\\\\mathrm{J}\\\\]\\n"
          + "\\n"
          + "HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH $28.3^\\\\circ\\\\text C$ to"
          + " $42.7^\\\\circ\\\\text C$.\\n"
          + "\\\\[q=mc\\\\Delta T=(10.1\\\\;\\\\mathrm{g})(1.18\\\\;\\\\mathrm{J/g\\\\cdot"
          + " °C})(42.7\\\\;\\\\mathrm{ °C}-28.3\\\\;\\\\mathrm{"
          + " °C})=171.6192\\\\;\\\\mathrm{J}\\\\]\\n"
          + "\\n"
          + "IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII.\\n"
          + "\\\\[860.6715\\\\;\\\\mathrm{J}+856.6429\\\\;\\\\mathrm{J}+171.6192\\\\;\\\\mathrm{J}=1888.9336\\\\;\\\\mathrm{J}=1.89\\\\;\\\\mathrm{kJ}\\\\]\",\n"
          + "}";

  public static void main(String[] args) {
    System.out.println(JSON);
  }
}

This result is completely not compilable
Image

  1. com.google.googlejavaformat.java.FormatterException#formatDiagnostics using wrong param to format the diagnostics: It uses the original java content (22 lines intotal) instead of formatted java content (79 lines in total). That is why we getting IndexOutOfBoundsException
Langage dominant
Java
Étoiles
6.2k
Forks
940
Merge moyen
5 min
PR mergées (30 j)
8

Préparer son environnement

Par où commencer

  1. Lisez l'issue en entier, puis le guide de contribution du projet.
  2. Signalez en commentaire que vous la prenez — cela évite que deux personnes fassent le même travail.
  3. Forkez le dépôt et travaillez sur une branche.
  4. Ouvrez une pull request qui référence le numéro de l'issue.

Autres issues de google/google-java-format

Toutes les issues de google/google-java-format

Issues similaires

Plus d'issues Java

Recevez les nouvelles issues par e-mail

Un résumé court des issues GitHub adaptées aux débutants.