Merge branch 't/20601/20601_experimental' into benchmarking_tool

VERSION.txt

@@ -1 +1 @@
-SageMath version 7.2.rc1, Release Date: 2016-05-07
+SageMath version 7.2.rc2, Release Date: 2016-05-11

build/pkgs/configure/checksums.ini

@@ -1,4 +1,4 @@
 tarball=configure-VERSION.tar.gz
-sha1=6ba41f01a5e6c4244ae0cd1b777d1f105ca2c507
-md5=44f2228be0b7190646294a40ff5b7806
-cksum=3056196411
+sha1=2e2f3713d17f597d923c35d7af4bd5f19e226b15
+md5=bb04a6931810f297e95152485156bcb8
+cksum=1667255197

build/pkgs/configure/package-version.txt

@@ -1 +1 @@
-162
+163

build/pkgs/giacpy/checksums.ini

@@ -1,4 +1,4 @@
 tarball=giacpy-VERSION.tar.gz
-sha1=67693f9a60601fc8c4a0c0ba41300f88679ed070
-md5=6ebb254d597eb00b95b2b36ae4dbbdbf
-cksum=3344860417
+sha1=871b31ca287253090923dda0403b08eda1d0d846
+md5=3129fd620fbb6e16f33345d44d4fea73
+cksum=1753840688

build/pkgs/giacpy/package-version.txt

@@ -1 +1 @@
-0.5.5
+0.5.6

build/pkgs/openssl/checksums.ini

@@ -1,4 +1,4 @@
 tarball=openssl-VERSION.tar.gz
-sha1=36af23887402a5ea4ebef91df8e61654906f58f2
-md5=f3c710c045cdee5fd114feb69feba7aa
-cksum=1676048282
+sha1=577585f5f5d299c44dd3c993d3c0ac7a219e4949
+md5=9392e65072ce4b614c1392eefc1f23d0
+cksum=3553483078

build/pkgs/openssl/package-version.txt

@@ -1 +1 @@
-1.0.2g
+1.0.2h

configure.ac

@@ -449,11 +449,9 @@ else
     # Add the .0 because Debian/Ubuntu gives version numbers like
     # 4.6 instead of 4.6.4 (Trac #18885)
     case "$GXX_VERSION.0" in
-        [[0-3]].*|4.[[0-8]].*)
-            # Install our own GCC if the system-provided one is older than GCC-4.9.
-            # GCC-4.8.x breaks because of http://trac.sagemath.org/ticket/14460
-            # which is GCC bug http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56982
-            SAGE_SHOULD_INSTALL_GCC([you have $CXX version $GXX_VERSION, which is too old]);;
+        [[0-3]].*|4.[[0-7]].*)
+            # Install our own GCC if the system-provided one is older than gcc-4.8.
+            SAGE_SHOULD_INSTALL_GCC([you have $CXX version $GXX_VERSION, which is quite old]);;
     esac
 
     # The following tests check that the version of the compilers

src/bin/sage-banner

@@ -1,5 +1,5 @@
 ┌────────────────────────────────────────────────────────────────────┐
-│ SageMath version 7.2.rc1, Release Date: 2016-05-07                 │
+│ SageMath version 7.2.rc2, Release Date: 2016-05-11                 │
 │ Type "notebook()" for the browser-based notebook interface.        │
 │ Type "help()" for help.                                            │
 └────────────────────────────────────────────────────────────────────┘

src/bin/sage-version.sh

@@ -1,4 +1,4 @@
 # Sage version information for shell scripts
 # This file is auto-generated by the sage-update-version script, do not edit!
-SAGE_VERSION='7.2.rc1'
-SAGE_RELEASE_DATE='2016-05-07'
+SAGE_VERSION='7.2.rc2'
+SAGE_RELEASE_DATE='2016-05-11'

src/sage/misc/superseded.py

@@ -214,6 +214,21 @@ def __init__(self, trac_number, stacklevel=4):
             See http://trac.sagemath.org/99999 for details.
             piep (99,) {}
 
+        TESTS:
+
+        The following test works together with the doc-test for
+        :method:`__experimental_self_test` to demonstrate that warnings are issued only
+        once, even in doc-tests (see :trac:`20601`).
+        ::
+
+            sage: from sage.misc.superseded import __experimental_self_test
+            sage: _ = __experimental_self_test("A")
+            doctest:...: FutureWarning: This class/method/function is
+            marked as experimental. It, its functionality or its
+            interface might change without a formal deprecation.
+            See http://trac.sagemath.org/88888 for details.
+            I'm A
+
         .. SEEALSO::
 
             :func:`experimental`,
@@ -252,16 +267,40 @@ def __call__(self, func):
         @sage_wraps(func)
         def wrapper(*args, **kwds):
             from sage.misc.superseded import experimental_warning
-            experimental_warning(self.trac_number,
-                         'This class/method/function is marked as '
-                         'experimental. It, its functionality or its '
-                         'interface might change without a '
-                         'formal deprecation.',
-                         self.stacklevel)
+            if not wrapper._already_issued:
+                experimental_warning(self.trac_number,
+                            'This class/method/function is marked as '
+                            'experimental. It, its functionality or its '
+                            'interface might change without a '
+                            'formal deprecation.',
+                            self.stacklevel)
+                wrapper._already_issued = True
             return func(*args, **kwds)
+        wrapper._already_issued = False
 
         return wrapper
 
+from sage.structure.sage_object import SageObject
+class __experimental_self_test(SageObject):
+    r"""
+    This is a class only to demonstrate with a doc-test that the @experimental
+    decorator only issues a warning message once (see :trac:`20601`).
+
+    The test below does not issue a warning message because that warning has
+    already been issued by a previous doc-test in the @experimental code. Note
+    that this behaviour can not be demonstrated within a single documentation
+    string: Sphinx will itself supress multiple issued warnings.
+    
+    TESTS::
+
+        sage: from sage.misc.superseded import __experimental_self_test
+        sage: _ = __experimental_self_test("B")
+        I'm B
+    """
+    @experimental(trac_number=88888)
+    def __init__(self, x):
+        print("I'm " + x)
+
 
 class DeprecatedFunctionAlias(object):
     """

src/sage/version.py

@@ -1,4 +1,4 @@
 # Sage version information for Python scripts
 # This file is auto-generated by the sage-update-version script, do not edit!
-version = '7.2.rc1'
-date = '2016-05-07'
+version = '7.2.rc2'
+date = '2016-05-11'

src/setup.py

@@ -75,6 +75,14 @@ def excepthook(*exc):
 if DEVEL:
     extra_compile_args.append('-ggdb')
 
+# Work around GCC-4.8.0 bug which miscompiles some sig_on() statements,
+# as witnessed by a doctest in sage/libs/gap/element.pyx if the
+# compiler flag -Og is used. See also
+# * http://trac.sagemath.org/sage_trac/ticket/14460
+# * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56982
+if subprocess.call("""$CC --version | grep -i 'gcc.* 4[.]8' >/dev/null """, shell=True) == 0:
+    extra_compile_args.append('-fno-tree-dominator-opts')
+
 #########################################################
 ### Testing related stuff
 #########################################################