cannot find first or last token in PlusOp node

[danielbprice]

I am using decaffeinate 2.23.1. decaffeinate is crashing on my CoffeeScript input:

abc = "Hello there,"

x = "#{abc} this should trigger a message about" + \
    "invalid plusops"

(repl)

a.coffee: cannot find first or last token in PlusOp node
  2 | abc = "Hello there,"
  3 |
> 4 | x = "#{abc} this should trigger a message about" + \
    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  5 |     "invalid plusops"
  6 |

[danielbprice]

(removing the "plus" from line 4 and using a simple string works fine).

[danielbprice]

Might be related to bug #389.

[alangpierce]

Thanks for the report! Here's the decaffeinate-parser output for a minified test case: repl.

Looks to me like a decaffeinate-parser bug: it's parsing it as two PlusOps when it should be parsing it to a TemplateLiteral. The CoffeeScript lexer/parser loses template literal information, so decaffeinate-parser tries to reconstruct it, and it looks like that's what's going wrong here.