Dune crashes with a promote into rule

[tcoopman]

Dune version: 2.1.3

Given this rule:

(rule
    (targets Shared__Message_j.ml Shared__Message_j.mli)
    (deps (:atd-file Shared__Message.atd))
    (action  (run atdgen -j -j-std %{atd-file}))
    (mode (promote (into shared)))
    )

when I run the rule: esy b dune build atd, dune crashes:

Error: exception Sys_error("atd/shared/Shared__Message_j.ml: No such file or directory")
Backtrace:
Raised by primitive operation at file "stdlib.ml", line 324, characters 29-55
Called from file "src/stdune/io.ml", line 184, characters 8-126
Re-raised at file "src/stdune/io.ml", line 189, characters 8-23
Called from file "src/dune/artifact_substitution.ml", line 383, characters 15-48
Called from file "src/fiber/fiber.ml", line 229, characters 16-19
Called from file "src/dune/build_system.ml", line 1637, characters 8-1023
Called from file "src/fiber/fiber.ml", line 114, characters 10-15
Re-raised at file "src/stdune/exn.ml" (inlined), line 37, characters 27-56
Called from file "src/stdune/exn_with_backtrace.ml", line 13, characters 33-71
Called from file "src/fiber/fiber.ml", line 85, characters 10-17
Re-raised at file "src/stdune/exn.ml" (inlined), line 37, characters 27-56
Called from file "src/stdune/exn_with_backtrace.ml", line 13, characters 33-71
Called from file "src/fiber/fiber.ml", line 85, characters 10-17
Re-raised at file "src/stdune/exn.ml" (inlined), line 37, characters 27-56
Called from file "src/stdune/exn_with_backtrace.ml", line 13, characters 33-71
Called from file "src/fiber/fiber.ml", line 85, characters 10-17
Re-raised at file "src/stdune/exn.ml" (inlined), line 37, characters 27-56
Called from file "src/stdune/exn_with_backtrace.ml", line 13, characters 33-71
Called from file "src/fiber/fiber.ml", line 85, characters 10-17
Re-raised at file "src/stdune/exn.ml" (inlined), line 37, characters 27-56
Called from file "src/stdune/exn_with_backtrace.ml", line 13, characters 33-71
Called from file "src/fiber/fiber.ml", line 85, characters 10-17
                   
I must not segfault....

When I remove the into option the rule works correctly, but obviously I want the file to be promoted into an other directory.

[tcoopman]

The rule should have been:

(rule
    (targets Shared__Message_j.ml Shared__Message_j.mli)
    (deps (:atd-file Shared__Message.atd))
    (action  (run atdgen -j -j-std %{atd-file}))
    (mode (promote (into ../shared)))
    )

Now it's not crashing (it crashed because atd/shared didn't exist I guess).
Feel free to close this is if it's not seen as a bug.

[rgrinberg]

This is definitely a bug. In general, dune should never show you stack traces like this.

[rgrinberg]

#3073 fixes this