fix: improve panic management (#3710)

pkg/golinters/goanalysis/runner_action.go

@@ -98,6 +98,13 @@ func (act *action) waitUntilDependingAnalyzersWorked() {
 func (act *action) analyzeSafe() {
 	defer func() {
 		if p := recover(); p != nil {
+			if !act.isroot {
+				// This line allows to display "hidden" panic with analyzers like buildssa.
+				// Some linters are dependent of sub-analyzers but when a sub-analyzer fails the linter is not aware of that,
+				// this results to another panic (ex: "interface conversion: interface {} is nil, not *buildssa.SSA").
+				act.r.log.Errorf("%s: panic during analysis: %v, %s", act.a.Name, p, string(debug.Stack()))
+			}
+
 			act.err = errorutil.NewPanicError(fmt.Sprintf("%s: package %q (isInitialPkg: %t, needAnalyzeSource: %t): %s",
 				act.a.Name, act.pkg.Name, act.isInitialPkg, act.needAnalyzeSource, p), debug.Stack())
 		}