export: set correct exit status

test.sh

@@ -307,25 +307,31 @@ EXTRAENV=-i
 when_run <<EOF "export with strange inputs"
 export PATH=$PATH
 export var
+echo status=\$?
 echo var=[\$var]
 export blue=
+echo status=\$?
 echo blue=[\$blue]
 env -u PATH env
 EOF
 expecting <<EOF
+status=0
 var=[]
+status=0
 blue=[]
 blue=
 EOF
 
 when_run <<"EOF" "export with invalid identifiers"
 export = 123=456 hello=hi 456=789
+echo status=$?
 echo hello=$hello
 EOF
 expecting <<"EOF"
 minishell: export: `=': not a valid identifier
 minishell: export: `123=456': not a valid identifier
 minishell: export: `456=789': not a valid identifier
+status=1
 hello=hi
 EOF