Bug#902230: antlr4: Parse tree GUI crashes at launch

[Miroslav R.]

Package: antlr4
Version: 4.5.3-2
Severity: important

Dear Maintainer,

I was trying to view the parse tree for an input sentence via the /usr/share/antlr4/grun script
that comes with your package. However, grun crashed with the following exception:

  Exception in thread "main" java.lang.NoClassDefFoundError: org/abego/treelayout/Configuration

I figured out the problem lies in CLASSPATH (set by the grun script) missing the tree layout
library /usr/share/java/treelayout.jar.

Reproduction steps:

  1. Create a grammar, e.g. test.g4:

grammar test;
main: 'hello' ('a'|'b')+;

  2. Run "antlr4 test.g4"
  3. Compile test*.java
  4. Run "/usr/share/antlr4/grun test main -gui"
  5. Enter "helloab" followed by an EOF

Potential solution:

  CLASSPATH=.:/usr/share/java/antlr4.jar:/usr/share/java/antlr4-runtime.jar:/usr/share/java/treelayout.jar


-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (990, 'testing'), (800, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.14.0-2-amd64 (SMP w/8 CPU cores)
Locale: LANG=sk_SK.UTF-8, LC_CTYPE=sk_SK.UTF-8 (charmap=UTF-8), LANGUAGE=sk_SK.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages antlr4 depends on:
ii  default-jre-headless [java6-runtime-headless]    2:1.8-59
ii  libantlr3-runtime-java                           3.5.2-9
ii  libantlr4-runtime-java                           4.5.3-2
ii  libstringtemplate4-java                          4.0.8-2
ii  libtreelayout-java                               1.0.3-1
ii  openjdk-8-jre-headless [java6-runtime-headless]  8u151-b12-1

antlr4 recommends no packages.

antlr4 suggests no packages.

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