Recursive building error without details why the build is failing

[maxclaus]

It occurs if the build fails after the project was already running successfully:

[gaper] Building program
[gaper] Error building binary during a restart:  exit status 2
[gaper] Building program
[gaper] Error building binary during a restart:  exit status 2
[gaper] Building program
[gaper] Error building binary during a restart:  exit status 2

Example message returned on building the project with go build directly:

make build
middleware.go:54:31: undefined: monitoring.KeyIgnoreMetricsForTransaction
middleware.go:63:31: undefined: monitoring.KeyRoutePathTemplate
middleware.go:125:16: undefined: monitoring.KeyIgnoreMetricsForTransaction

That is what we need to show for gaper as well.