commit a853089479b60b829bab1c4a0a737a073415f8a7
author Bram Moolenaar <Bram@vim.org> Mon Feb 08 21:53:09 2021 +0100
committer Bram Moolenaar <Bram@vim.org> Mon Feb 08 21:53:09 2021 +0100
tree c05ab6242a7301a31adbb0e2021aa09fc775ad8b
parent 4549dad874244fe933b969e4ac0b41923ee70dc3

patch 8.2.2488: json_encode() gives generic argument error

Problem:    json_encode() gives generic argument error.
Solution:   Mention the type that can't be encoded. (issue #7802)

src/json.c

diff --git a/src/json.c b/src/json.c
index 8262640..dba003e 100644
--- a/src/json.c
+++ b/src/json.c
@@ -230,8 +230,7 @@
 	case VAR_PARTIAL:
 	case VAR_JOB:
 	case VAR_CHANNEL:
-	    // no JSON equivalent TODO: better error
-	    emsg(_(e_invarg));
+	    semsg(_(e_cannot_json_encode_str), vartype_name(val->v_type));
 	    return FAIL;
 
 	case VAR_BLOB: