test: reproduce #6907

a dune crash that occurs when:

* dune is running in watch mode
* $PWD is added to $PATH on macos

Signed-off-by: Rudi Grinberg <[email protected]>

test/blackbox-tests/test-cases/watching/dune

@@ -1,8 +1,17 @@
+(cram
+ (deps helpers.sh))
+
 (cram
  ; see https://github.com/ocaml/dune/pull/4728
  (enabled_if
   (<> "macosx" %{ocaml-config:system}))
- (deps helpers.sh))
+ (applies_to * \ path-pwd))
+
+(cram
+ ; see https://github.com/ocaml/dune/pull/4728
+ (enabled_if
+  (= "macosx" %{ocaml-config:system}))
+ (applies_to path-pwd))
 
 (cram
  (applies_to what-dune-watches)

test/blackbox-tests/test-cases/watching/path-pwd.t

@@ -0,0 +1,102 @@
+This is a bug occur that occurs when we're running dune in watch mode and
+adding . to $CWD
+
+Reproduce #6907
+
+  $ . ./helpers.sh
+
+  $ export PATH=.:$PATH
+  $ echo "(lang dune 2.0)" > dune-project
+
+  $ start_dune
+
+  $ cat > x <<EOF
+  > original-contents
+  > EOF
+
+  $ cat >dune <<EOF
+  > (rule (with-stdout-to y (echo %{read:x})))
+  > EOF
+
+  $ build y
+  Error: { payload = Some [ [ "id"; [ "auto"; "0" ] ] ]
+  ; message =
+      "connection terminated. this request will never receive a response"
+  ; kind = Connection_dead
+  }
+
+  $ touch x
+
+  $ build y
+  Timed out
+  Internal error, please report upstream including the contents of _build/log.
+  Description:
+    ("as_outside_build_dir_exn", { path = In_build_dir ".sync/0" })
+  Raised at Stdune__Code_error.raise in file
+    "otherlibs/stdune/src/code_error.ml", line 11, characters 30-62
+  Called from Dune_engine__Fs_memo.handle_fs_event in file
+    "src/dune_engine/fs_memo.ml", line 289, characters 13-47
+  Called from
+    Dune_engine__Scheduler.Run_once.handle_invalidation_events.handle_event in
+    file "src/dune_engine/scheduler.ml", line 966, characters 26-55
+  Called from Stdlib__List.fold_left in file "list.ml", line 121, characters
+    24-34
+  Called from Dune_engine__Scheduler.Run_once.build_input_change in file
+    "src/dune_engine/scheduler.ml", line 1002, characters 23-56
+  Called from Fiber.run.loop in file "otherlibs/fiber/src/fiber.ml", line 15,
+    characters 51-60
+  Called from Dune_engine__Scheduler.Run_once.run in file
+    "src/dune_engine/scheduler.ml", line 1069, characters 10-50
+  Re-raised at Stdune__Exn.raise_with_backtrace in file
+    "otherlibs/stdune/src/exn.ml", line 36, characters 27-56
+  Called from Cmdliner_term.app.(fun) in file
+    "vendor/cmdliner/src/cmdliner_term.ml", line 24, characters 19-24
+  Called from Cmdliner_eval.run_parser in file
+    "vendor/cmdliner/src/cmdliner_eval.ml", line 34, characters 37-44
+  Called from Cmdliner_eval.eval_value in file
+    "vendor/cmdliner/src/cmdliner_eval.ml", line 202, characters 14-39
+  Called from Dune__exe__Main in file "bin/main.ml", line 97, characters 10-41
+
+  I must not crash.  Uncertainty is the mind-killer. Exceptions are the
+  little-death that brings total obliteration.  I will fully express my cases. 
+  Execution will pass over me and through me.  And when it has gone past, I
+  will unwind the stack along its path.  Where the cases are handled there will
+  be nothing.  Only I will remain.
+  exit 1
+
+  $ stop_dune
+  Error: rpc server not running
+  Internal error, please report upstream including the contents of _build/log.
+  Description:
+    ("as_outside_build_dir_exn", { path = In_build_dir ".sync/0" })
+  Raised at Stdune__Code_error.raise in file
+    "otherlibs/stdune/src/code_error.ml", line 11, characters 30-62
+  Called from Dune_engine__Fs_memo.handle_fs_event in file
+    "src/dune_engine/fs_memo.ml", line 289, characters 13-47
+  Called from
+    Dune_engine__Scheduler.Run_once.handle_invalidation_events.handle_event in
+    file "src/dune_engine/scheduler.ml", line 966, characters 26-55
+  Called from Stdlib__List.fold_left in file "list.ml", line 121, characters
+    24-34
+  Called from Dune_engine__Scheduler.Run_once.build_input_change in file
+    "src/dune_engine/scheduler.ml", line 1002, characters 23-56
+  Called from Fiber.run.loop in file "otherlibs/fiber/src/fiber.ml", line 15,
+    characters 51-60
+  Called from Dune_engine__Scheduler.Run_once.run in file
+    "src/dune_engine/scheduler.ml", line 1069, characters 10-50
+  Re-raised at Stdune__Exn.raise_with_backtrace in file
+    "otherlibs/stdune/src/exn.ml", line 36, characters 27-56
+  Called from Cmdliner_term.app.(fun) in file
+    "vendor/cmdliner/src/cmdliner_term.ml", line 24, characters 19-24
+  Called from Cmdliner_eval.run_parser in file
+    "vendor/cmdliner/src/cmdliner_eval.ml", line 34, characters 37-44
+  Called from Cmdliner_eval.eval_value in file
+    "vendor/cmdliner/src/cmdliner_eval.ml", line 202, characters 14-39
+  Called from Dune__exe__Main in file "bin/main.ml", line 97, characters 10-41
+
+  I must not crash.  Uncertainty is the mind-killer. Exceptions are the
+  little-death that brings total obliteration.  I will fully express my cases. 
+  Execution will pass over me and through me.  And when it has gone past, I
+  will unwind the stack along its path.  Where the cases are handled there will
+  be nothing.  Only I will remain.
+  exit 1