fix topic error (#768)

19 jobs for master in 43 minutes and 19 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Check
passed #901600
linux-docker
check-std

00:02:23

passed #901601
linux-docker
check-wasm

00:01:00

 
  Workspace
passed #901602
linux-docker
build-std

00:02:22

passed #901603
linux-docker
build-wasm

00:01:01

passed #901607
linux-docker
clippy-std

00:02:10

passed #901608
linux-docker
clippy-wasm

00:02:04

passed #901606
linux-docker
codecov

00:04:54

passed #901605
linux-docker
docs

00:01:40

passed #901609
linux-docker
fmt

00:01:03

passed #901604
linux-docker
test

00:02:36

 
  Examples
passed #901612
linux-docker
examples-clippy-std

00:01:32

passed #901613
linux-docker
examples-clippy-wasm

00:01:16

passed #901614
linux-docker
examples-contract-build

00:06:00

passed #901615
linux-docker
examples-contract-build-delegator

00:01:53

passed #901616
linux-docker
examples-docs

00:01:56

passed #901611
linux-docker
examples-fmt

00:00:16

passed #901610
linux-docker
examples-test

00:01:53

 
  Fuzz
passed #901617
linux-docker
fuzz-tests

00:29:56

 
  Publish
passed #901618
linux-docker
publish-docs

00:00:25