Fixes #710.

tests/invalidPackage/invalidPackage.nimble

@@ -0,0 +1,13 @@
+# Package
+
+version       = "0.1.0"
+author        = "Dominik Picheta"
+description   = "A new awesome nimble package"
+license       = "MIT"
+srcDir        = "src"
+
+thisFieldDoesNotExist = "hello"
+
+# Dependencies
+
+requires "nim >= 0.20.0"

tests/tester.nim

@@ -86,6 +86,13 @@ test "depsOnly + flag order test":
   check(not output.contains("Success: packagebin2 installed successfully."))
   check exitCode == QuitSuccess
 
+test "nimscript evaluation error message":
+  cd "invalidPackage":
+    var (output, exitCode) = execNimble("check")
+    let lines = output.strip.processOutput()
+    check(lines[^2].endsWith("Error: undeclared identifier: 'thisFieldDoesNotExist'"))
+    check exitCode == QuitFailure
+
 test "caching of nims and ini detects changes":
   cd "caching":
     var (output, exitCode) = execNimble("dump")