unhandled parse error: UnexpectedTopLevelExpr

[mcol]

I have written this simple program (my first ever in roc):

app [main] { pf: platform "https://github.com/roc-lang/basic-cli/releases/download/0.15.0/SlwdbJ-3GR7uBWQo6zlmYWNYOxnvo8r6YABXD-45UOw.tar.br" }

File.readUtf8 "myfile.txt"

I run it with

RUST_BACKTRACE=full roc build test.roc

I get:

thread 'main' panicked at crates/reporting/src/error/parse.rs:681:14:
not yet implemented: unhandled parse error: UnexpectedTopLevelExpr(@146)
stack backtrace:
   0:     0x59ba19d4b8ab - <unknown>
   1:     0x59ba1900d1e0 - <unknown>
   2:     0x59ba19d47113 - <unknown>
   3:     0x59ba19d4b644 - <unknown>
   4:     0x59ba19d4d1a0 - <unknown>
   5:     0x59ba19d4cebf - <unknown>
   6:     0x59ba19d4d6be - <unknown>
   7:     0x59ba19d4d5c2 - <unknown>
   8:     0x59ba19d4bda6 - <unknown>
   9:     0x59ba19d4d324 - <unknown>
  10:     0x59ba18f02e75 - <unknown>
  11:     0x59ba19aef3e3 - <unknown>
  12:     0x59ba19ae91ef - <unknown>
  13:     0x59ba197730bd - <unknown>
  14:     0x59ba19738d9d - <unknown>
  15:     0x59ba19740b7d - <unknown>
  16:     0x59ba19736bd6 - <unknown>
  17:     0x59ba196d5179 - <unknown>
  18:     0x59ba19217d26 - <unknown>
  19:     0x59ba19333205 - <unknown>
  20:     0x59ba191dcb43 - <unknown>
  21:     0x59ba191cfba3 - <unknown>
  22:     0x59ba191cfbc3 - <unknown>
  23:     0x59ba19d3ce2a - <unknown>
  24:     0x59ba191e25c5 - <unknown>
  25:     0x7ac87de29d90 - __libc_start_call_main
                               at ./csu/../sysdeps/nptl/libc_start_call_main.h:58:16
  26:     0x7ac87de29e40 - __libc_start_main_impl
                               at ./csu/../csu/libc-start.c:392:3
  27:     0x59ba18fa06ce - <unknown>
  28:                0x0 - <unknown>

roc nightly pre-release, built from commit 06996d8 on Fr 25 Okt 2024 09:02:07 UTC (on linux x86-64)

[Anton-4]

Ow, sorry to get you started with an error like this @mcol!
The important thing is that you need to have a main function in your file.
Instead of reading a file, it can be easier to import it like here. If you do prefer to read it the traditional way, check out this example (make sure to switch out "../platform/main.roc" with the basic-cli url).

We should definitely provide a nice error message for this case.