Golang x/tools/cmd/digraph: allpaths missing edges

Something is amiss in digraph allpaths.

% digraph allpaths BaseAgent LlmRequest <deps.topo 
BaseAgent BaseAgent
BaseAgent Telemetry
BaseTool LlmRequest
InvocationContext BaseAgent
LlmRequest BaseTool
Telemetry LlmRequest
% 

InvocationContext looks out of place here, since it is not reachable from BaseAgent in the output graph. But it turns out that it is:

% digraph somepath BaseAgent InvocationContext <deps.topo
BaseAgent InvocationContext
%

% go version -m `{which digraph}
/Users/rsc/bin/digraph: go1.25-devel_607adee5a6 Sun May 4 10:29:18 2025 -0400
    path    golang.org/x/tools/cmd/digraph
    mod golang.org/x/tools  v0.35.0 h1:mBffYraMEf7aa0sB+NuKnuCy8qI/9Bughn8dC2Gu5r0=
    build   -buildmode=exe
    build   -compiler=gc
    build   DefaultGODEBUG=decoratemappings=0,gotestjsonbuildtext=1,multipathtcp=0,randseednop=0,rsa1024min=0,tlsmlkem=0,x509rsacrt=0,x509usepolicies=0
    build   CGO_ENABLED=1
    build   CGO_CFLAGS=
    build   CGO_CPPFLAGS=
    build   CGO_CXXFLAGS=
    build   CGO_LDFLAGS=
    build   GOARCH=arm64
    build   GOOS=darwin
    build   GOARM64=v8.0
% 

Comment From: adonovan

Would you mind sharing deps.topo? Thanks.

Comment From: gopherbot

Change https://go.dev/cl/692675 mentions this issue: cmd/digraph: fix bug in allpaths