content-exists() errors in control statements

[xzyfer]

Originally reported in sass/libsass#2842

Spec sass/sass-spec#1361

Dart Sass failure https://travis-ci.org/sass/sass-spec/jobs/507132046

[nex3]

Dart Sass failure https://travis-ci.org/sass/sass-spec/jobs/507132046

This doesn't look like a failing build to me... can you include the actual text of the error message, or the diff if we're generating incorrect errors?

[xzyfer]

Form the link

LANGUAGE_VERSION=4.0 IMPL=dart-sass

Finished in 7.016657s, 330.0717 runs/s, 0.0000 assertions/s.
  1) Failure:
SassSpec::Test#test__spec/core_functions/content-exists/basic/error/inside_function [/home/travis/build/sass/sass-spec/lib/sass_spec/test.rb:399]:
Error message doesn't match the expected error..
--- expected
+++ actual
@@ -1,8 +1,9 @@
+# encoding: ASCII-8BIT
 "Error: content-exists() may only be called within a mixin.
   ,
 2 |   @return content-exists(); / must be called within a mixin
   |           ^^^^^^^^^^^^^^^^
   '
-  /sass/spec/core_functions/content-exists/error/inside_function/input.scss 2:11  my-content-exists()
-  /sass/spec/core_functions/content-exists/error/inside_function/input.scss 7:12  uses-content-exists-indirectly()
-  /sass/spec/core_functions/content-exists/error/inside_function/input.scss 14:1  root stylesheet"
+  /sass/spec/core_functions/content-exists/basic/error/inside_function/input.scss 2:11  my-content-exists()
+  /sass/spec/core_functions/content-exists/basic/error/inside_function/input.scss 7:12  uses-content-exists-indirectly()
+  /sass/spec/core_functions/content-exists/basic/error/inside_function/input.scss 14:1  root stylesheet"
  2) Failure:
SassSpec::Test#test__spec/core_functions/content-exists/basic/error/outside_mixin [/home/travis/build/sass/sass-spec/lib/sass_spec/test.rb:399]:
Error message doesn't match the expected error..
--- expected
+++ actual
@@ -1,6 +1,7 @@
+# encoding: ASCII-8BIT
 "Error: content-exists() may only be called within a mixin.
   ,
 1 | $error: content-exists();
   |         ^^^^^^^^^^^^^^^^
   '
-  /sass/spec/core_functions/content-exists/error/outside_mixin/input.scss 1:9  root stylesheet"
+  /sass/spec/core_functions/content-exists/basic/error/outside_mixin/input.scss 1:9  root stylesheet"
2316 runs, 0 assertions, 2 failures, 0 errors, 11 skips

[nex3]

It looks like those are expected errors (note the error in their path). Those same tests are currently passing on master, so I think whatever's going wrong here is an issue with your pull request. In particular, it looks like you moved the test file without re-generating the error output, so the stack trace doesn't match the expectation.