* parse.y (str_extend): should check nesting parentheses in #{}.

* process.c (pst_wstopsig): returns nil unless WIFSTOPPED() is
  non-zero.

* process.c (pst_wtermsig): returns nil unless WIFSIGNALED() is
  non-zero.

* process.c (pst_wexitstatus): returns nil unless WIFEXITED() is
  non-zero.

* eval.c (rb_thread_select): tv_sec and tv_usec should not be
  negative.

* signal.c (posix_signal): do not set SA_RESTART for SIGVTALRM.

* parse.y (call_args2): block_arg may follow the first argument in
  call_args2.

* eval.c (stack_check): should avoid stack length check during
  raising SystemStackError exception.


git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@1852 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 9 insertions, 3 deletions

diff --git a/process.c b/process.c
index a72f00306..81685d0c1 100644
--- a/process.c
+++ b/process.c
@@ -161,7 +161,9 @@ pst_wstopsig(st)
 {
     int status = NUM2INT(st);
 
-    return INT2NUM(WSTOPSIG(status));
+    if (WIFSTOPPED(status))
+	return INT2NUM(WSTOPSIG(status));
+    return Qnil;
 }
 
 static VALUE
@@ -182,7 +184,9 @@ pst_wtermsig(st)
 {
     int status = NUM2INT(st);
 
-    return INT2NUM(WTERMSIG(status));
+    if (WIFSIGNALED(status))
+	return INT2NUM(WTERMSIG(status));
+    return Qnil;
 }
 
 static VALUE
@@ -203,7 +207,9 @@ pst_wexitstatus(st)
 {
     int status = NUM2INT(st);
 
-    return INT2NUM(WEXITSTATUS(status));
+    if (WIFEXITED(status))
+	return INT2NUM(WEXITSTATUS(status));
+    return Qnil;
 }
 
 static VALUE