Detect and very loudly warn about Return::Multilevel in exception_action()

[dbsrgits/DBIx-Class.git] / lib / DBIx / Class / _Util.pm

diff --git a/lib/DBIx/Class/_Util.pm b/lib/DBIx/Class/_Util.pm
index 04e6b9f..091f976 100644 (file)
--- a/lib/DBIx/Class/_Util.pm
+++ b/lib/DBIx/Class/_Util.pm
@@ -4,7 +4,11 @@ package # hide from PAUSE
 use warnings;
 use strict;
 
-use constant SPURIOUS_VERSION_CHECK_WARNINGS => ($] < 5.010 ? 1 : 0);
+use constant SPURIOUS_VERSION_CHECK_WARNINGS => (
+  ( $ENV{DBICTEST_VERSION_WARNS_INDISCRIMINATELY} or $] < 5.010 )
+    ? 1
+    : 0
+);
 
 BEGIN {
   package # hide from pause
@@ -21,8 +25,9 @@ BEGIN {
 
     HAS_ITHREADS => $Config{useithreads} ? 1 : 0,
 
-    # ::Runmode would only be loaded by DBICTest, which in turn implies t/
-    DBICTEST => eval { DBICTest::RunMode->is_author } ? 1 : 0,
+    UNSTABLE_DOLLARAT => ( "$]" < 5.013002 ) ? 1 : 0,
+
+    DBICTEST => $INC{"DBICTest/Util.pm"} ? 1 : 0,
 
     # During 5.13 dev cycle HELEMs started to leak on copy
     # add an escape for these perls ON SMOKERS - a user will still get death
@@ -66,7 +71,8 @@ use base 'Exporter';
 our @EXPORT_OK = qw(
   sigwarn_silencer modver_gt_or_eq modver_gt_or_eq_and_lt
   fail_on_internal_wantarray fail_on_internal_call
-  refdesc refcount hrefaddr is_exception detected_reinvoked_destructor
+  refdesc refcount hrefaddr
+  scope_guard is_exception detected_reinvoked_destructor
   quote_sub qsub perlstring serialize
   UNRESOLVABLE_CONDITION
 );
@@ -112,6 +118,31 @@ sub serialize ($) {
   nfreeze($_[0]);
 }
 
+sub scope_guard (&) {
+  croak 'Calling scope_guard() in void context makes no sense'
+    if ! defined wantarray;
+
+  # no direct blessing of coderefs - DESTROY is buggy on those
+  bless [ $_[0] ], 'DBIx::Class::_Util::ScopeGuard';
+}
+{
+  package #
+    DBIx::Class::_Util::ScopeGuard;
+
+  sub DESTROY {
+    &DBIx::Class::_Util::detected_reinvoked_destructor;
+
+    local $@ if DBIx::Class::_ENV_::UNSTABLE_DOLLARAT;
+
+    eval {
+      $_[0]->[0]->();
+      1;
+    } or do {
+      Carp::cluck "Execution of scope guard $_[0] resulted in the non-trappable exception:\n\n$@";
+    };
+  }
+}
+
 sub is_exception ($) {
   my $e = $_[0];