testing.common.FailNow
standard libraryThe 6416th most-called standard-library method by production calls. Called 2,102 times across 220 modules; 93 of those run outside tests and generated code.
No change in production calls since 2026-W37.
- prod calls
- 93
- non-test, non-generated
- all calls
- 2,102
- total callsites
- modules
- 220
- distinct callers
- in loop
- 10%
- of prod calls
- in tests
- 96%
- 2,009 calls
- resolved
- 100%
- to a known target
resolution mix
How each call resolves
How each call was attributed. Only resolved kinds, where the target function is known, count toward the ranking. Interface dispatch and unresolved receivers are reported separately and never guessed. Read the taxonomy →
- Embedded method100%Reached through an embedded type.
who calls this
Notable callers
Production calls into common.FailNow from notable Go projects. Open one on the map to see what else it hammers.
- Kubernetes 15 16%
- HashiCorp 3 3%
- containerd 2 2%
- Docker 2 2%
- Istio 2 2%
where it's called
Callsites in the wild
12 representative callsites of 2,102, prioritizing in-loop and non-test usage. We link to source, never display it.
-
dapr/dapr @v1.18.4
in loop -
open-policy-agent/opa @v1.20.2
in loop - in loop
- in loop
-
ucloud/ucloud-sdk-go @v0.22.128
in loop -
hashicorp/raft @v1.8.0
in loop -
open-policy-agent/opa @v1.20.2
in loop -
hashicorp/raft @v1.8.0
in loop -
open-policy-agent/opa @v1.20.2
in loop - in loop test
-
cockroachdb/cockroach @v19.2.12+incompatible
in loop test -
dario.cat/mergo @v1.0.2
mergo_test.go:778
in loop test
top callers
The modules that reach for it
The modules that call common.FailNow most in this snapshot.
- sigs.k8s.io/kustomize/kyaml27713%
- github.com/360EntSecGroup-Skylar/excelize1246%
- github.com/qax-os/excelize1246%
- github.com/hyperledger/fabric1045%
- github.com/ugorji/go/codec965%
siblings
More from testing
The other most-called members in this package. See all →