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-rw-r--r--src/evaluate.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/evaluate.c b/src/evaluate.c
index 2067a011..90c87d09 100644
--- a/src/evaluate.c
+++ b/src/evaluate.c
@@ -748,6 +748,13 @@ static int expr_evaluate_map(struct eval_ctx *ctx, struct expr **expr)
map->mappings->ops->name);
}
+ if (!datatype_equal(map->map->dtype, map->mappings->set->keytype))
+ return expr_binary_error(ctx->msgs, map->mappings, map->map,
+ "datatype mismatch, map expects %s, "
+ "mapping expression has type %s",
+ map->mappings->set->keytype->desc,
+ map->map->dtype->desc);
+
map->dtype = map->mappings->set->datatype;
map->flags |= EXPR_F_CONSTANT;