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DanilaFe / pegasus

A parser generator for C and Crystal.
MIT License
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pegasus-dot Unhandled exception NilAssertionError #7

Open masukomi opened 2 years ago

masukomi commented 2 years ago

Attempting to generate a dot file with the json generated from arithmetic.grammar results in an error.

Reproducing:

❯ bin/pegasus < grammars/arithmetic.grammar > grammars/arithmetic.json
❯ bin/pegasus-dot < grammars/arithmetic.json
digraph G {
  q1 -> q5 [label="open_parenth"]
  q1 -> q6 [label="number"]
Unhandled exception: Nil assertion failed (NilAssertionError)
  from /opt/homebrew/Cellar/crystal/1.5.0/share/crystal/src/array.cr:1143:18 in '__crystal_main'
  from /opt/homebrew/Cellar/crystal/1.5.0/share/crystal/src/crystal/main.cr:115:5 in 'main'

crystal info: 

❯ crystal --version
Crystal 1.5.0 (2022-07-06)

LLVM: 14.0.6
Default target: aarch64-apple-darwin21.5.0
DanilaFe commented 2 years ago

Thank you for the thorough report! I'll take a look as soon as I have time.

DanilaFe commented 1 year ago

I believe this is fixed by 5820a51342f8465834c8359a6a5ea6c0650dee45. Sorry it took so long! It was a pretty straightforward bug; I just haven't had a lot of time to maintain pegasus.