IndexOutOfBoundsException - Wrong formatted content when dealing with latex String

Aperta

#1,439 aperta il 6/8/2026 1 commento 0 reazioni 0 assegnatari Vedi su GitHub

Nessuno ha ancora preso questa issue.

Valutazione

Difficoltà: 4/5
Tempo stimato: 3-5 giorni
Idoneità per principianti: 55/100

Tipo di issue: Bug
Chiarezza: Abbastanza chiara
Stato di attività: Tranquilla
Stack tecnologico: java
Ambito: tooling

Direzione di ricerca

Riproduci il malfunzionamento con la classe Java fornita, quindi esamina StringWrapper#applyReplacements e FormatterException#formatDiagnostics. Verifica il codice sorgente generato e la gestione della riga diagnostica rispetto all’input originale. L’attività è completata quando la formattazione non produce più codice Java non compilabile e il formatter segnala l’errore senza IndexOutOfBoundsException.

Scritto dal modello di indicizzazione a partire dal testo della issue.

Descrizione

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

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:

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

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

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