Merge pull request #65802 from timokau/sage-transient-debug

sage: add patch to debug transient issue

pkgs/applications/science/math/sage/dist-tests.nix

@@ -0,0 +1,17 @@
+# Lists past failures and files associated with it. The intention is to build
+# up a subset of a testsuite that catches 95% of failures that are relevant for
+# distributions while only taking ~5m to run. This in turn makes it more
+# reasonable to re-test sage on dependency changes and makes it easier for
+# users to override the sage derivation.
+# This is an experiment for now. If it turns out that there really is a small
+# subset of files responsible for the vast majority of packaging tests, we can
+# think about moving this upstream.
+[
+	"src/sage/env.py" # [1]
+	"src/sage/misc/persist.pyx" # [1]
+	"src/sage/misc/inline_fortran.py" # [1]
+	"src/sage/repl/ipython_extension.py" # [1]
+]
+
+# Numbered list of past failures to annotate files with
+# [1] PYTHONPATH related issue https://github.com/NixOS/nixpkgs/commit/ec7f569211091282410050e89e68832d4fe60528

pkgs/applications/science/math/sage/patches/configurationpy-error-verbose.patch

@@ -0,0 +1,19 @@
+diff --git a/src/sage/repl/configuration.py b/src/sage/repl/configuration.py
+index 67d7d2accf..18279581e2 100644
+--- a/src/sage/repl/configuration.py
++++ b/src/sage/repl/configuration.py
+@@ -9,10 +9,11 @@ the IPython simple prompt is being used::
+     sage: cmd = 'print([sys.stdin.isatty(), sys.stdout.isatty()])'
+     sage: import pexpect
+     sage: output = pexpect.run(
+-    ....:     'bash -c \'echo "{0}" | sage\''.format(cmd),
++    ....:     'bash -c \'export SAGE_BANNER=no; echo "{0}" | sage\''.format(cmd),
+     ....: ).decode('utf-8', 'surrogateescape')
+-    sage: 'sage: [False, True]' in output
+-    True
++    sage: print(output)
++    sage...[False, True]
++    sage...Exiting Sage ...
+ """
+ 
+ #*****************************************************************************

pkgs/applications/science/math/sage/sage-src.nix

@@ -61,7 +61,11 @@ stdenv.mkDerivation rec {
   # Since sage unfortunately does not release bugfix releases, packagers must
   # fix those bugs themselves. This is for critical bugfixes, where "critical"
   # == "causes (transient) doctest failures / somebody complained".
-  bugfixPatches = [ ];
+  bugfixPatches = [
+    # To help debug the transient error in
+    # https://trac.sagemath.org/ticket/23087 when it next occurs.
+    ./patches/configurationpy-error-verbose.patch
+  ];
 
   # Patches needed because of package updates. We could just pin the versions of
   # dependencies, but that would lead to rebuilds, confusion and the burdons of

pkgs/applications/science/math/sage/sage-tests.nix

@@ -51,6 +51,10 @@ stdenv.mkDerivation rec {
     export HOME="$TMPDIR/sage-home"
     mkdir -p "$HOME"
 
+    # avoid running out of memory with many threads in subprocesses, see
+    # https://github.com/NixOS/nixpkgs/pull/65802
+    export GLIBC_TUNABLES=glibc.malloc.arena_max=4
+
     echo "Running sage tests with arguments ${timeSpecifier} ${patienceSpecifier} ${testArgs}"
     "sage" -t --nthreads "$NIX_BUILD_CORES" --optional=sage ${timeSpecifier} ${patienceSpecifier} ${testArgs}
   '';