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-rw-r--r--tests/functional/eval.sh9
1 files changed, 9 insertions, 0 deletions
diff --git a/tests/functional/eval.sh b/tests/functional/eval.sh
index 0e789cc47..2b34caddb 100644
--- a/tests/functional/eval.sh
+++ b/tests/functional/eval.sh
@@ -22,6 +22,15 @@ nix eval -E 'assert 1 + 2 == 3; true'
[[ $(nix eval int -f - < "./eval.nix") == 123 ]]
[[ "$(nix eval --expr '{"assert"=1;bar=2;}')" == '{ "assert" = 1; bar = 2; }' ]]
+# Top-level eval errors should be printed to stderr with a traceback.
+topLevelThrow="$(expectStderr 1 nix eval --expr 'throw "a sample throw message"')"
+[[ "$topLevelThrow" =~ "a sample throw message" ]]
+[[ "$topLevelThrow" =~ "while calling the 'throw' builtin" ]]
+
+# But errors inside something should print an elided version, and exit with 0.
+outputOfNestedThrow="$(nix eval --expr '{ throws = throw "a sample throw message"; }')"
+[[ "${outputOfNestedThrow}" == "{ throws = «error: a sample throw message»; }" ]]
+
# Check if toFile can be utilized during restricted eval
[[ $(nix eval --restrict-eval --expr 'import (builtins.toFile "source" "42")') == 42 ]]