https://bugs.gentoo.org/959838
https://github.com/dovecot/core/pull/248
https://github.com/dovecot/core/commit/a60ada751a827f73c3f0d0c0059f340918e981ad

From a60ada751a827f73c3f0d0c0059f340918e981ad Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Mon, 30 Jun 2025 04:51:19 +0100
Subject: [PATCH] lib-json: drop invalid ATTR_PURE

Several functions in json-types.h mutate one of their arguments (usually *size_r)
and hence aren't eligible for __attribute__((pure)) which promises that
the function has no side-effects.

This manifests as a test failure in test-json-istream.c when building
Dovecot with -ftrivial-auto-var-init=zero (or =pattern).
---
 src/lib-json/json-types.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/lib-json/json-types.h b/src/lib-json/json-types.h
index caa27193c3c..6ce966883c7 100644
--- a/src/lib-json/json-types.h
+++ b/src/lib-json/json-types.h
@@ -176,7 +176,7 @@ json_value_as_str(const struct json_value *jvalue)
 	}
 	return jvalue->content.str;
 }
-static inline ATTR_PURE const unsigned char *
+static inline const unsigned char *
 json_value_get_data(const struct json_value *jvalue, size_t *size_r)
 {
 	switch (jvalue->content_type) {
@@ -192,7 +192,7 @@ json_value_get_data(const struct json_value *jvalue, size_t *size_r)
 	i_unreached();
 }
 
-static inline ATTR_PURE int
+static inline int
 json_value_get_stream(const struct json_value *jvalue,
 		       struct istream **stream_r)
 {
@@ -314,7 +314,7 @@ json_node_as_str(const struct json_node *jnode)
 	return json_value_as_str(&jnode->value);
 }
 
-static inline ATTR_PURE const unsigned char *
+static inline const unsigned char *
 json_node_get_data(const struct json_node *jnode, size_t *size_r)
 {
 	const char *literal;
@@ -497,7 +497,7 @@ json_node_is_boolean(const struct json_node *jnode)
 	return FALSE;
 }
 
-static inline ATTR_PURE int
+static inline int
 json_node_get_boolean(const struct json_node *jnode, bool *bool_r)
 {
 	switch (jnode->type) {