17547 Commits

Author SHA1 Message Date
MarcoFalke
faaef9434c
fuzz: [refactor] Extract ALL_CONNECTION_TYPES constant 2021-01-02 15:06:36 +01:00
MarcoFalke
fa42da2d54
fuzz: Use ConsumeNode in process_message target 2021-01-02 15:05:24 +01:00
MarcoFalke
fa121f058f
fuzz: Use ConsumeNode in process_messages target 2021-01-02 15:05:21 +01:00
MarcoFalke
faaa4f2b6a
refactor: Remove nMyStartingHeight from CNode/Connman 2021-01-02 10:24:45 +01:00
MarcoFalke
ae8f797135
Merge #20210: net: assert CNode::m_inbound_onion is inbound in ctor, add getter, unit tests
86c495223f048e5ca2cf0d8730af7db3b76f7aba net: add CNode::IsInboundOnion() public getter and unit tests (Jon Atack)
6609eb8cb50fe92c7317b5db9e72d4333b3aab1b net: assert CNode::m_inbound_onion is inbound in ctor (Jon Atack)
993d1ecd191a7d9161082d4026f020cbf00835bb test, fuzz: fix constructing CNode with invalid inbound_onion (Jon Atack)

Pull request description:

  The goal of this PR is to be able to depend on `m_inbound_onion` in AttemptToEvictConnection in #20197:

  - asserts `CNode::m_inbound_onion` is inbound in the CNode ctor to have a validity check at the class boundary
  - fixes a unit test and a fuzz utility that were passing invalid inbound onion values to the CNode ctor
  - drops an unneeded check in `CNode::ConnectedThroughNetwork()` for its inbound status
  - adds a public getter `IsInboundOnion()` that also allows unit testing it
  - adds unit test coverage

ACKs for top commit:
  sipa:
    utACK 86c495223f048e5ca2cf0d8730af7db3b76f7aba
  LarryRuane:
    ACK 86c495223f048e5ca2cf0d8730af7db3b76f7aba
  vasild:
    ACK 86c495223f048e5ca2cf0d8730af7db3b76f7aba
  MarcoFalke:
    review ACK 86c495223f048e5ca2cf0d8730af7db3b76f7aba 🐍

Tree-SHA512: 21109105bc4e5e03076fadd489204be00eac710c9de0127708ca2d0a10a048ff81f640f589a7429967ac3eb51d35fe24bb2b12e53e7aa3efbc47aaff6396d204
2021-01-02 09:54:01 +01:00
MarcoFalke
4a540683ec
Merge #20813: scripted-diff: Bump copyright headers
fa0074e2d82928016a43ca408717154a1c70a4db scripted-diff: Bump copyright headers (MarcoFalke)

Pull request description:

  Needs to be done because no one has removed the years yet

ACKs for top commit:
  practicalswift:
    ACK fa0074e2d82928016a43ca408717154a1c70a4db

Tree-SHA512: 210e92acd7d400b556cf8259c3ec9967797420cfd19f0c2a4fa54cb2b3d32ad9ae27e771269201e7d554c0f4cd73a8b1c1a42c9f65d8685ca4d52e5134b071a3
2020-12-31 18:50:19 +01:00
MarcoFalke
fa0074e2d8
scripted-diff: Bump copyright headers
-BEGIN VERIFY SCRIPT-
./contrib/devtools/copyright_header.py update ./
-END VERIFY SCRIPT-
2020-12-31 09:45:41 +01:00
MarcoFalke
fa5b935840
fuzz: Remove duplicate ALL_OUTPUT_TYPE array 2020-12-31 08:51:42 +01:00
MarcoFalke
fafce49336
fuzz: Bump FuzzedDataProvider.h
Latest version from https://raw.githubusercontent.com/llvm/llvm-project/70de7e0d9a95b7fcd7c105b06bd90fdf4e01f563/compiler-rt/include/fuzzer/FuzzedDataProvider.h
2020-12-31 08:49:10 +01:00
MarcoFalke
f1f26b8d5b
Merge #20377: fuzz: Fill various small fuzzing gaps
4ddbcd0d9abe40cd387e63d8c4817e0fe36004dc fuzz: Add coverage for CDataStream consumer (practicalswift)
546a0764f3b701ee07f5a8d168e2a58fed6b46d5 fuzz: Fill various small fuzzing gaps (practicalswift)

Pull request description:

  Fill various small fuzzing gaps.

  See [`doc/fuzzing.md`](https://github.com/bitcoin/bitcoin/blob/master/doc/fuzzing.md) for information on how to fuzz Bitcoin Core. Don't forget to contribute any coverage increasing inputs you find to the [Bitcoin Core fuzzing corpus repo](https://github.com/bitcoin-core/qa-assets).

  Happy fuzzing :)

ACKs for top commit:
  MarcoFalke:
    review ACK 4ddbcd0d9abe40cd387e63d8c4817e0fe36004dc

Tree-SHA512: d20f2cc0172f39948673846d088121782f39b4556df8b38fa14859cfa062c1519d18ee9601d4503ef1ba9613976cc5349c1fc0f0b9601a3d68127ffce1b1854e
2020-12-29 09:27:29 +01:00
Jon Atack
8f9ca31782
p2p: remove unused legacyWhitelisted variable 2020-12-29 00:53:57 +01:00
Wladimir J. van der Laan
d875bcc8f9
Merge #162: Add network to peers window and peer details
e262a19b0ba07d8d2334551f49ca1577ab2999fc gui: display network in peer details (Jon Atack)
913695307360d3582f74ffe225cb122b2e48023d gui: rename peer tab column headers, initialize in .h (Hennadii Stepanov)
05c08c696a1bc45ab28abe6f82bebbdbd6239c23 gui: add network column in peers tab/window (Jon Atack)
e0e55060bf697fe8b9ed43ff62383a0451e9c0ce gui: fix broken doxygen formatting in src/qt/guiutil.h (Jon Atack)
0d5613f9ded846aa20a95c757672e9560c664c4c gui: create GUIUtil::NetworkToQString() utility function (Jon Atack)
af9103cc792e17f35249f1d4cb30f0d6958ceb75 net, rpc: change CNodeStats::m_network from string to Network (Jon Atack)

Pull request description:

  and rename peers window column headers from NodeId and Node/Service to Peer Id and Address.

  ![Screenshot from 2020-12-27 14-45-31](https://user-images.githubusercontent.com/2415484/103172228-efec8600-4849-11eb-8cee-04a3d2ab1273.png)

ACKs for top commit:
  laanwj:
    ACK e262a19b0ba07d8d2334551f49ca1577ab2999fc

Tree-SHA512: 709c2a805c109c2dd033aca7b6b6dc94ebe2ce7a0168c71249e1e661c9c57d1f1c781a5b9ccf3b776bedeb83ae2fb5c505637337c45b1eb9a418cb1693a89761
2020-12-28 23:56:23 +01:00
MarcoFalke
e3dd0a56cf
Merge #20755: [rpc] Remove deprecated fields from getpeerinfo
454a4088a87eac5878070b26d13d5574da891877 [doc] Add release notes for removed getpeerinfo fields. (Amiti Uttarwar)
b1a936d4ae7dd9030b0720ef05579a90ce2894f1 [rpc] Remove deprecated "whitelisted" field from getpeerinfo (Amiti Uttarwar)
094c3beaa47c909070607e94f2544ed1472ddb17 [rpc] Remove deprecated "banscore" field from getpeerinfo (Amiti Uttarwar)
537053336fbc1b633e7c99286c3e3492eaca1e9d [rpc] Remove deprecated "addnode" field from getpeerinfo (Amiti Uttarwar)

Pull request description:

  This PR removes support for 3 fields on the `getpeerinfo` RPC that were deprecated in v0.21- `addnode`, `banscore` & `whitelisted`.

ACKs for top commit:
  sipa:
    utACK 454a4088a87eac5878070b26d13d5574da891877
  jnewbery:
    ACK 454a4088a87eac5878070b26d13d5574da891877.

Tree-SHA512: ccc0e90c0763eeb8529cf0c46162dbaca3f7773981b3b52d9925166ea7421aed086795d56b320e16c9340f68862388785f52a9b78314865070917b33180d7cd6
2020-12-28 22:40:39 +01:00
fanquake
4a8f4ac4fc
Merge #20771: refactor: Enable -Wswitch for FeeEstimateHorizon
faccf8b1e1af293dfe9158d732718e7798a2fd89 refactor: Enable -Wswitch for FeeEstimateHorizon (MarcoFalke)

Pull request description:

  This enables the `-Wswitch` compiler warning for `FeeEstimateHorizon` by removing the `default` case in `switch` statements.

ACKs for top commit:
  practicalswift:
    cr ACK faccf8b1e1af293dfe9158d732718e7798a2fd89
  jonatack:
    ACK faccf8b1e1af293dfe9158d732718e7798a2fd89
  hebasto:
    ACK faccf8b1e1af293dfe9158d732718e7798a2fd89, I have reviewed the code and it looks OK, I agree it can be merged.

Tree-SHA512: 63a8dff6e8dead149ec2fa8319e7ff41022c9534d423d3086fd8f22be073dc4915f74c7fe9139ee681a8204730cf58c80ef40c93fb33032d586e68b4f78f557d
2020-12-28 14:14:20 +08:00
practicalswift
4ddbcd0d9a fuzz: Add coverage for CDataStream consumer 2020-12-27 19:27:41 +00:00
Jon Atack
e262a19b0b
gui: display network in peer details 2020-12-27 14:38:16 +01:00
Hennadii Stepanov
9136953073
gui: rename peer tab column headers, initialize in .h 2020-12-27 14:30:33 +01:00
Jon Atack
05c08c696a
gui: add network column in peers tab/window 2020-12-27 14:30:24 +01:00
Jon Atack
e0e55060bf
gui: fix broken doxygen formatting in src/qt/guiutil.h 2020-12-27 14:29:26 +01:00
Jon Atack
0d5613f9de
gui: create GUIUtil::NetworkToQString() utility function 2020-12-27 14:29:24 +01:00
Jon Atack
af9103cc79
net, rpc: change CNodeStats::m_network from string to Network 2020-12-27 14:28:31 +01:00
fanquake
31e511658a
Merge #20674: fuzz: Call SendMessages after ProcessMessage to increase coverage
fa09f97beabafaaeb59fca710760578ff1f2e8d7 fuzz: Call SendMessages after ProcessMessage to increase coverage (MarcoFalke)

Pull request description:

ACKs for top commit:
  practicalswift:
    Tested ACK fa09f97beabafaaeb59fca710760578ff1f2e8d7
  dhruv:
    tACK fa09f97
  Crypt-iQ:
    cr ACK fa09f97beabafaaeb59fca710760578ff1f2e8d7
  sipa:
    utACK fa09f97beabafaaeb59fca710760578ff1f2e8d7

Tree-SHA512: 87c52aa38f902c4f6c9c2380f486a3ab21edc0e21e48bb619cdb67cfd698154cc57b170eef31fc940c0bb2c878e155847de03fc6e4cd85bed25f10c4f80c747b
2020-12-27 17:37:32 +08:00
Amiti Uttarwar
b1a936d4ae [rpc] Remove deprecated "whitelisted" field from getpeerinfo 2020-12-26 13:30:54 -08:00
Amiti Uttarwar
094c3beaa4 [rpc] Remove deprecated "banscore" field from getpeerinfo 2020-12-26 13:30:08 -08:00
Amiti Uttarwar
537053336f [rpc] Remove deprecated "addnode" field from getpeerinfo 2020-12-26 13:30:08 -08:00
MarcoFalke
02cf20b9f5
Merge #20756: [doc] Add missing field (permissions) to the getpeerinfo help
667d203687708390bc0f43f2dd3f4ab427b88338 [doc] Add permissions to the getpeerinfo help. (Amiti Uttarwar)

Pull request description:

  This field was previously being returned, but missing from the RPCHelpMan. This PR uses the existing `NET_PERMISSIONS_DOC` to inform RPC users about this field.

  ```
     "permissions" : [                 (json array) Any special permissions that have been granted to this peer
        "str",                          (string) bloomfilter (allow requesting BIP37 filtered blocks and transactions),
                                        noban (do not ban for misbehavior; implies download),
                                        forcerelay (relay transactions that are already in the mempool; implies relay),
                                        relay (relay even in -blocksonly mode, and unlimited transaction announcements),
                                        mempool (allow requesting BIP35 mempool contents),
                                        download (allow getheaders during IBD, no disconnect after maxuploadtarget limit),
                                        addr (responses to GETADDR avoid hitting the cache and contain random records with the most up-to-date info).

        ...
      ],

  ```

ACKs for top commit:
  Sjors:
    tACK 667d203687708390bc0f43f2dd3f4ab427b88338

Tree-SHA512: 973631b41d35d6333e3cb06b35277de869110f6ad6498c7e74f00c75202e8de1788a48755c21ac964903e5e6050a5e769a63866211aec9004cd665a727a54a3c
2020-12-26 21:26:12 +01:00
MarcoFalke
faccf8b1e1
refactor: Enable -Wswitch for FeeEstimateHorizon 2020-12-26 17:32:14 +01:00
MarcoFalke
43fc7a569c
Merge #19972: fuzz: Add fuzzing harness for node eviction logic
5a9ee0869b0b722ebfcdaabaefba6376522b2eeb tests: Add fuzzing harness for node eviction logic (practicalswift)

Pull request description:

  Add fuzzing harness for node eviction logic.

  See [`doc/fuzzing.md`](https://github.com/bitcoin/bitcoin/blob/master/doc/fuzzing.md) for information on how to fuzz Bitcoin Core. Don't forget to contribute any coverage increasing inputs you find to the [Bitcoin Core fuzzing corpus repo](https://github.com/bitcoin-core/qa-assets).

  Happy fuzzing :)

ACKs for top commit:
  MarcoFalke:
    cr ACK 5a9ee0869b0b722ebfcdaabaefba6376522b2eeb

Tree-SHA512: c2401d22134867e23dab1ba94ae7ef36fdf52aa0588fdc4705d9cb765ddf979fd775fdf153ce2359f1bc1787cf60bf0ebcd47c7aa29c672e6a253fa58cac292d
2020-12-25 13:32:31 +01:00
MarcoFalke
762cbd287f
Merge #15451: [doc] clarify getdata limit after #14897
c119ba3c9b321a7f4418860741b3f69173e9c891 [doc] clarify getdata limit after #14897 (Michael Polzer)

Pull request description:

  GETDATA is limited to blocks and transactions now and can't be used for other non-block data

ACKs for top commit:
  laanwj:
    ACK c119ba3c9b321a7f4418860741b3f69173e9c891
  theStack:
    ACK c119ba3c9b
  benthecarman:
    ACK c119ba3c9b321a7f4418860741b3f69173e9c891

Tree-SHA512: d6e9c109bcce4ef004ec83a9ec591163279476524dec97ed5f5c34e322dca35af66a168f0878ff972bbcec79d81623903f3619fedf8f88cdced3f3f66a779173
2020-12-25 09:43:25 +01:00
MarcoFalke
443988d406
Merge #20761: fuzz: Check that NULL_DATA is unspendable
fa2630328687645fbc7dd1ea46aac32514025715 fuzz: Check that NULL_DATA is unspendable (MarcoFalke)

Pull request description:

  * Every script of type NULL_DATA must be unspendable
  * The only know types of unspendable scripts are NULL_DATA and certain NONSTANDARD scripts

ACKs for top commit:
  sipa:
    utACK fa2630328687645fbc7dd1ea46aac32514025715

Tree-SHA512: 8297fbacf32b4868b12accc1c052d352d02d96540a1fc883de9d04a3df8734116deecc33046495c9a3af6d79fec7f8d63afbfa5e401a2ca8d7c70f0f13735c0d
2020-12-25 07:41:43 +01:00
MarcoFalke
f656165e9c
Merge #18772: rpc: calculate fees in getblock using BlockUndo data
66d012ad7f9381bacfc9b8388fa2ebf82cb86c9e test: RPC: getblock fee calculations (Elliott Jin)
bf7d6e31b1062ab5f90e14e83c56309f499fa2e9 RPC: getblock: tx fee calculation for verbosity 2 via Undo data (Elliott Jin)

Pull request description:

  This change is progress towards #18771 .  It adapts the fee calculation part of #16083 and addresses some feedback.  The additional "verbosity level 3" features are planned for a future PR.

  **Original PR description:**

  > Using block undo data (like in #14802) we can now show fee information for each transaction in a block without the need for additional -txindex and/or a ton of costly lookups. For a start we'll add transaction fee information to getblock verbosity level 2. This comes at a negligible speed penalty (<1%).

ACKs for top commit:
  luke-jr:
    tACK 66d012ad7f9381bacfc9b8388fa2ebf82cb86c9e
  fjahr:
    tACK 66d012ad7f9381bacfc9b8388fa2ebf82cb86c9e
  MarcoFalke:
    review ACK 66d012ad7f9381bacfc9b8388fa2ebf82cb86c9e 🗜

Tree-SHA512: be1fe4b866946a8dc36427f7dc72a20e10860e320a28fa49bc85bd2a93a0d699768179be29fa52e18b2ed8505d3ec272e586753ef2239b4230e0aefd233acaa2
2020-12-24 15:32:10 +01:00
MarcoFalke
fa26303286
fuzz: Check that NULL_DATA is unspendable 2020-12-24 14:16:59 +01:00
Amiti Uttarwar
667d203687 [doc] Add permissions to the getpeerinfo help.
This field was already being returned, but the RPCHelpMan did not indicate
this. So, this PR updates the help text to match.
2020-12-23 11:38:59 -08:00
John Newbery
176325a5a4 [net processing] Remove dropmessagestest
-dropmessagestest is a command line option that causes 1 in n received
messages to be dropped. The Bitcoin P2P protocol is stateful and in
general cannot handle messages being dropped. Dropped
version/verack/ping/pong messages will cause the connection to time out
and be torn down. Other dropped messages may also cause the peer to
believe that the peer has stalled and tear down the connection.

It seems difficult to uncover any actual issues with -dropmessagestest,
and any coverage that could be generated would probably be easier to
trigger with fuzz testing.
2020-12-22 17:48:31 +00:00
MarcoFalke
df127ecede
Merge #19829: net processing: Move block inventory state to net_processing
3002b4af2b4fde63026f8f7c575452a5c989c662 [net processing] Guard m_continuation_block with m_block_inv_mutex (John Newbery)
184557e8e03f76ff18dacdb32c12692d8578691f [net processing] Move hashContinue to net processing (John Newbery)
c853ef002ee7074b6e20eb8f58138c8293846424 scripted-diff: rename vBlockHashesToAnnounce and vInventoryBlockToSend (John Newbery)
53b7ac1b7d3394aeaad1e4a6e3b323d17cdf5994 [net processing] Move block inventory data to Peer (John Newbery)
78040f91687e7f1986e466d448c9b9530830e9b8 [net processing] Rename nStartingHeight to m_starting_height (John Newbery)
77a2c2f8f91a5c5a140fd970f9a3a142b43902bf [net processing] Move nStartingHeight to Peer (John Newbery)
717a374e74b64b7b90bc1b2995e8900212bd0bfe [net processing] Improve documentation for Peer destruction/locking (John Newbery)

Pull request description:

  This continues the work of moving application layer data into net_processing, by moving all block inventory state into the new Peer object added in #19607.

  For motivation, see #19398.

ACKs for top commit:
  jonatack:
    re-ACK 3002b4af2b4fde63026f8f7c575452a5c989c662 per `git diff 9aad3e4 3002b4a`
  Sjors:
    Code review re-ACK 3002b4af2b4fde63026f8f7c575452a5c989c662
  MarcoFalke:
    re-ACK 3002b4af2b4fde63026f8f7c575452a5c989c662 🌓

Tree-SHA512: eb2b474b73b025791ee3e6e41809926b332b48468763219f31638ca390f427632f05902dfc6a2c6bdc1ce47b215782f67874ddbf05b97d77d5897b7e2abfe4d9
2020-12-22 12:44:19 +01:00
practicalswift
e3d2ba7c70 fuzz: Update FuzzedDataProvider.h from upstream (LLVM)
Upstream revision: 6d0488f75b/compiler-rt/include/fuzzer/FuzzedDataProvider.h

Changes:
* [compiler-rt] FuzzedDataProvider: add ConsumeData and method.
* [compiler-rt] Fix a typo in a comment in FuzzedDataProvider.h.
* [compiler-rt] Add ConsumeRandomLengthString() version without arguments.
* [compiler-rt] Refactor FuzzedDataProvider for better readability.
* [compiler-rt] FuzzedDataProvider: make linter happy.
* [compiler-rt] Mark FDP non-template methods inline to avoid ODR violations.
2020-12-21 23:19:33 +00:00
MarcoFalke
2556a973ed
Merge #20731: rpc: Add missing description of vout in getrawtransaction help text
b23349b8804fb60c6b3d7d0e2a95927a0d1b49b9 rpc: Add missing description of vout in getrawtransaction help text (Ben Carman)

Pull request description:

  In `getrawtransaction` the vout did not have a description. I gave it the same description as the one used in `decoderawtransaction`.

ACKs for top commit:
  MarcoFalke:
    ACK b23349b8804fb60c6b3d7d0e2a95927a0d1b49b9 🏯

Tree-SHA512: 3833b97c82a46dfeb7ac825d4b2514b4b05ce54ac41f2144a8e2f2093b3411fe1d090c1e5b0c3d09200a2ea164c8d17ece12cdb43bbaeaeccc51a9da6dd7b7a3
2020-12-21 19:57:38 +01:00
Ben Carman
b23349b880
rpc: Add missing description of vout in getrawtransaction help text 2020-12-21 09:57:06 -06:00
Wladimir J. van der Laan
68c7acf6bb
Merge #20671: Replace boost::optional with std::optional
fa4435e22f78f632a455016ce00a357009aac059 Replace boost::optional with std::optional (MarcoFalke)
fa7e803f3e4df33117927aef6fef9bfaee4f410d Remove unused MakeOptional (MarcoFalke)
fadd4029dced574778ade228931a7706f92bc676 psbt: Assert that tx has a value in UpdatePSBTOutput (MarcoFalke)

Pull request description:

  Now that we can use std::optional from the vanilla standard library, drop the third-party boost dependency

ACKs for top commit:
  practicalswift:
    cr ACK fa4435e22f78f632a455016ce00a357009aac059: patch looks correct!
  laanwj:
    code review ACK fa4435e22f78f632a455016ce00a357009aac059
  hebasto:
    ACK fa4435e22f78f632a455016ce00a357009aac059, I have reviewed the code and it looks OK, I agree it can be merged.

Tree-SHA512: 50c5a1a130cac65e043e0177ba5b009fc2ba09343af4e23322ff2eb32184a55f8f2dea66e7a1b9d9acf56bc164eef4e47448750549a07f3b661199ac9bf9afef
2020-12-21 13:12:16 +01:00
Patrick Strateman
d8b9cec25b inline non-member functions with body in fuzzing headers 2020-12-20 18:19:43 -05:00
John Newbery
3002b4af2b [net processing] Guard m_continuation_block with m_block_inv_mutex 2020-12-20 10:06:14 +00:00
John Newbery
184557e8e0 [net processing] Move hashContinue to net processing
Also rename to m_continuation_block to better communicate meaning.
2020-12-20 10:03:38 +00:00
John Newbery
c853ef002e scripted-diff: rename vBlockHashesToAnnounce and vInventoryBlockToSend
-BEGIN VERIFY SCRIPT-
sed -i 's/vBlockHashesToAnnounce/m_blocks_for_headers_relay/g' src/net_processing.*
sed -i 's/vInventoryBlockToSend/m_blocks_for_inv_relay/g' src/net_processing.*
-END VERIFY SCRIPT-
2020-12-20 10:01:48 +00:00
John Newbery
53b7ac1b7d [net processing] Move block inventory data to Peer 2020-12-20 10:01:48 +00:00
John Newbery
78040f9168 [net processing] Rename nStartingHeight to m_starting_height
Not done as a scripted diff to avoid misnaming the local variable in
ProcessMessage().
2020-12-20 10:01:46 +00:00
John Newbery
77a2c2f8f9 [net processing] Move nStartingHeight to Peer 2020-12-20 10:01:26 +00:00
John Newbery
717a374e74 [net processing] Improve documentation for Peer destruction/locking
Suggested here:

- https://github.com/bitcoin/bitcoin/pull/19607#discussion_r467071878
- https://github.com/bitcoin/bitcoin/pull/19829#discussion_r546116786
2020-12-19 14:49:03 +00:00
MarcoFalke
fa4435e22f
Replace boost::optional with std::optional 2020-12-19 09:46:55 +01:00
MarcoFalke
fa7e803f3e
Remove unused MakeOptional
The only use was to work around a compiler warning in an ancient
compiler, which we no longer support.
2020-12-19 09:45:58 +01:00
MarcoFalke
fadd4029dc
psbt: Assert that tx has a value in UpdatePSBTOutput
This was previously done implicitly in boost::optional by BOOST_ASSERT.
Also, it was checked at runtime by valgrind if for some reason the
assert was disabled.

std::optional dereference won't assert, so add the Assert here
explicitly.

The explicit Assert also helps to document the code better.
2020-12-19 09:45:39 +01:00