lightningd: parent watchman's formatted blockhash strings to tmpctx - #9363
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ksedgwic wants to merge 1 commit into
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lightningd: parent watchman's formatted blockhash strings to tmpctx#9363ksedgwic wants to merge 1 commit into
ksedgwic wants to merge 1 commit into
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json_add_string copies its value, so the strings fmt_bitcoin_blkid allocates in json_block_processed and json_getwatchmanheight are referenced by nothing once the call returns. They are parented to the response stream and freed with it, but the memleak scanner works by searching memory for pointers to each allocation: when a dev memleak check races an in-flight response, the unreferenced string is reported as a leak and fails the test run (seen in a liquid CI run of test_bwatch_add_watch_creates_datastore_entry). Parent them to tmpctx, the idiom used elsewhere. Fixes: ElementsProject#9362 Changelog-None
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Fixes #9362 : the memleak scanner can flag the blockhash strings
watchman formats into its RPC responses -- json_add_string copies the
value, so nothing references the string afterward, and a dev memleak
check racing an in-flight response reports it as a leak. Parent them
to tmpctx, the idiom used elsewhere.
Changelog-None