Merge tag v13.4.2 into v14.2.x

* submodules/beaver v0.3.3(cbce378)...v0.5.1(cee61e3) (17 commits)
  > dlang: Properly restore old shell flags
  > Pass DFLAGS from beaver to docker container
  > install: Remove temporary files on success
  > dlang install: Add support for contexts
  > beaver install: Support multiple Dockerfile contexts
  (...)

.travis.yml

@@ -18,35 +18,48 @@ env:
     global:
         # Make sure beaver is in the PATH
         - PATH="$(git config -f .gitmodules submodule.beaver.path)/bin:$PATH"
-    matrix:
-        - DMD=1.081.* DIST=xenial F=production AFTER_SCRIPT=1
-        - DMD=1.081.* DIST=xenial F=devel
-        - DMD=2.070.2.s* DIST=xenial F=production
-        - DMD=2.070.2.s* DIST=xenial F=devel
-        - DMD=2.071.2.s* DIST=xenial F=production
-        - DMD=2.071.2.s* DIST=xenial F=devel
-        - DMD=2.077.* DIST=xenial F=production
-        - DMD=2.077.* DIST=xenial F=devel
+        - DIST=xenial
+        - COV=1
 
-# Don't build tags already converted to D2
-if: NOT tag =~ \+d2$
+# Basic config is inherited from the global scope
+jobs:
+    templates:
+        - &test-matrix
+          stage: Test
+          # Don't build tags already converted to D2
+          if: NOT tag =~ \+d2$
+          after_success: beaver dlang codecov
+          install: beaver dlang install
+          script: beaver dlang make
+    include:
+        # Test matrix
 
-install: beaver dlang install
+        - <<: *test-matrix
+          env: DMD=1.081.* F=production
+        - <<: *test-matrix
+          env: DMD=1.081.* F=devel
+        - <<: *test-matrix
+          env: DMD=2.070.2.s* F=production
+        - <<: *test-matrix
+          env: DMD=2.070.2.s* F=devel
+        - <<: *test-matrix
+          env: DMD=2.071.2.s* F=production
+        - <<: *test-matrix
+          env: DMD=2.071.2.s* F=devel
+        - <<: *test-matrix
+          env: DMD=2.077.* F=production
+        - <<: *test-matrix
+          env: DMD=2.077.* F=devel
 
-script: beaver dlang make
+        # Additional stages
+
+        - stage: Closure allocation check
+          env: DMD=2.070.2.s* F=devel
+          install: beaver dlang install
+          script: ci/closures.sh
 
-jobs:
-    include:
         - stage: D2 Release
-          # We need to include the exclusion of D2 tags because this "if"
-          # replaces the global one
           if: tag IS present AND NOT tag =~ \+d2$
-          # env: is inherited from the first matrix row, for converting code to
-          # D2 it doesn't matter what compiler version or F we use, it only
-          # matters that we have a DIST and DMD variables defined, so we just
-          # use whatever the first row have.
-          # before_install: and install: are also inherited and we don't need
-          # to override them.
+          env: DMD=2.070.2.s* F=devel
+          install: beaver dlang install
           script: beaver dlang d2-release
-          # Overridden to NOP, otherwise is inherited
-after_success: true

ci/closures.sh

@@ -0,0 +1,12 @@
+#!/bin/sh
+set -xe
+
+# Enables printing of all potential GC allocation sources to stdout
+export DFLAGS=-vgc
+
+# Prepare sources
+beaver dlang make d2conv
+
+# Ensure that there are no lines about closure allocations in the output
+# Filters away errors from submodules to focus on swarm own code only
+! beaver dlang make fasttest 2>&1 | grep "\./src/.*\<closure\>"