My debug build fails with

0:12.06 gmake[4]: Opouští se adresář „/mnt/dan/firefox.git/obj-powerpc64le-unknown-linux-gnu/ipc/chromium/src/third_party“
 0:12.06 gmake[4]: Vstupuje se do adresáře „/mnt/dan/firefox.git/obj-powerpc64le-unknown-linux-gnu/ipc/glue“
 0:12.06 ipc/glue/Unified_cpp_ipc_glue0.o
 0:12.06 /usr/bin/g++ -std=gnu++17 -o Unified_cpp_ipc_glue0.o -c  -I/mnt/dan/firefox.git/obj-powerpc64le-unknown-linux-gnu/dist/stl_wrappers -I/mnt/dan/firefox.git/obj-powerpc64le-unknown-linux-gnu/dist/system_wrappers -include /mnt/dan/firefox.git/config/gcc_hidden.h -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fstack-protector-strong -DDEBUG=1 -DHAVE_UINT64_T -DWEBRTC_POSIX -DWEBRTC_BUILD_LIBEVENT -DWEBRTC_LINUX -DOS_POSIX=1 -DOS_LINUX=1 '-DMOZ_CHILD_PROCESS_NAME="plugin-container"' '-DMOZ_CHILD_PROCESS_BUNDLE="plugin-container.app/Contents/MacOS/"' -DMOZ_HAS_MOZGLUE -DMOZILLA_INTERNAL_API -DIMPL_LIBXUL -DSTATIC_EXPORTABLE_JS_API -I/mnt/dan/firefox.git/ipc/glue -I/mnt/dan/firefox.git/obj-powerpc64le-unknown-linux-gnu/ipc/glue -I/mnt/dan/firefox.git/caps -I/mnt/dan/firefox.git/dom/broadcastchannel -I/mnt/dan/firefox.git/dom/indexedDB -I/mnt/dan/firefox.git/dom/storage -I/mnt/dan/firefox.git/media/webrtc/trunk -I/mnt/dan/firefox.git/media/webrtc/trunk/webrtc -I/mnt/dan/firefox.git/netwerk/base -I/mnt/dan/firefox.git/xpcom/build -I/mnt/dan/firefox.git/dom/ipc -I/mnt/dan/firefox.git/toolkit/crashreporter -I/mnt/dan/firefox.git/toolkit/xre -I/mnt/dan/firefox.git/xpcom/base -I/mnt/dan/firefox.git/xpcom/threads -I/mnt/dan/firefox.git/obj-powerpc64le-unknown-linux-gnu/ipc/ipdl/_ipdlheaders -I/mnt/dan/firefox.git/ipc/chromium/src -I/mnt/dan/firefox.git/ipc/glue -I/mnt/dan/firefox.git/obj-powerpc64le-unknown-linux-gnu/dist/include -I/mnt/dan/firefox.git/obj-powerpc64le-unknown-linux-gnu/dist/include/nspr -I/mnt/dan/firefox.git/obj-powerpc64le-unknown-linux-gnu/dist/include/nss -fPIC -DMOZILLA_CLIENT -include /mnt/dan/firefox.git/obj-powerpc64le-unknown-linux-gnu/mozilla-config.h -Wall -Wempty-body -Wignored-qualifiers -Woverloaded-virtual -Wpointer-arith -Wsign-compare -Wtype-limits -Wunreachable-code -Wwrite-strings -Wno-invalid-offsetof -Wduplicated-cond -Wimplicit-fallthrough -Wunused-function -Wunused-variable -Wno-error=maybe-uninitialized -Wno-error=deprecated-declarations -Wno-error=array-bounds -Wno-error=coverage-mismatch -Wno-error=free-nonheap-object -Wno-multistatement-macros -Wno-error=class-memaccess -Wno-error=deprecated-copy -Wformat -Wformat-overflow=2 -fno-sized-deallocation -fno-aligned-new -fno-exceptions -fno-strict-aliasing -fno-rtti -fno-exceptions -fno-math-errno -pthread -pipe -g -Og -fno-omit-frame-pointer -funwind-tables -Wno-error=shadow -Wno-shadow  -MD -MP -MF .deps/Unified_cpp_ipc_glue0.o.pp  -fdiagnostics-color  Unified_cpp_ipc_glue0.cpp
 0:22.67 In file included from Unified_cpp_ipc_glue0.cpp:110:
 0:22.67 /mnt/dan/firefox.git/ipc/glue/GeckoChildProcessHost.cpp: In member function ‘virtual bool mozilla::ipc::BaseProcessLauncher::DoSetup()’:
 0:22.67 /mnt/dan/firefox.git/ipc/glue/GeckoChildProcessHost.cpp:1039:5: error: ‘self’ was not declared in this scope
 0:22.67  1039 |     self->mLaunchOptions->env_map[ENVIRONMENT_LITERAL("MALLOC_OPTIONS")] =
 0:22.67       |     ^~~~
 0:24.21 In file included from /mnt/dan/firefox.git/obj-powerpc64le-unknown-linux-gnu/dist/include/mozilla/ipc/FileDescriptorShuffle.h:11,
 0:24.21                  from /mnt/dan/firefox.git/ipc/chromium/src/base/process_util.h:40,
 0:24.21                  from /mnt/dan/firefox.git/obj-powerpc64le-unknown-linux-gnu/dist/include/mozilla/ipc/Transport.h:10,
 0:24.21                  from /mnt/dan/firefox.git/ipc/glue/BackgroundChild.h:11,
 0:24.21                  from /mnt/dan/firefox.git/ipc/glue/BackgroundImpl.cpp:7,
 0:24.21                  from Unified_cpp_ipc_glue0.cpp:2:
 0:24.21 /mnt/dan/firefox.git/obj-powerpc64le-unknown-linux-gnu/dist/include/nsTArray.h: In instantiation of ‘static void AssignRangeAlgorithm<true, true>::implementation(ElemType*, IndexType, SizeType, const Item*) [with Item = mozilla::dom::workerinternals::JSSettings::JSGCSetting; ElemType = mozilla::dom::workerinternals::JSSettings::JSGCSetting; IndexType = long unsigned int; SizeType = long unsigned int]’:
 0:24.21 /mnt/dan/firefox.git/obj-powerpc64le-unknown-linux-gnu/dist/include/nsTArray.h:2310:57:   required from ‘void nsTArray_Impl<E, Alloc>::AssignRange(nsTArray_Impl<E, Alloc>::index_type, nsTArray_Impl<E, Alloc>::size_type, const Item*) [with Item = mozilla::dom::workerinternals::JSSettings::JSGCSetting; E = mozilla::dom::workerinternals::JSSettings::JSGCSetting; Alloc = nsTArrayInfallibleAllocator; nsTArray_Impl<E, Alloc>::index_type = long unsigned int; nsTArray_Impl<E, Alloc>::size_type = long unsigned int]’
 0:24.21 /mnt/dan/firefox.git/obj-powerpc64le-unknown-linux-gnu/dist/include/nsTArray.h:2334:3:   required from ‘nsTArray_Impl<E, Alloc>::elem_type* nsTArray_Impl<E, Alloc>::ReplaceElementsAtInternal(nsTArray_Impl<E, Alloc>::index_type, nsTArray_Impl<E, Alloc>::size_type, const Item*, nsTArray_Impl<E, Alloc>::size_type) [with ActualAlloc = nsTArrayInfallibleAllocator; Item = mozilla::dom::workerinternals::JSSettings::JSGCSetting; E = mozilla::dom::workerinternals::JSSettings::JSGCSetting; Alloc = nsTArrayInfallibleAllocator; nsTArray_Impl<E, Alloc>::elem_type = mozilla::dom::workerinternals::JSSettings::JSGCSetting; nsTArray_Impl<E, Alloc>::index_type = long unsigned int; nsTArray_Impl<E, Alloc>::size_type = long unsigned int]’
 0:24.22 /mnt/dan/firefox.git/obj-powerpc64le-unknown-linux-gnu/dist/include/nsTArray.h:1398:48:   required from ‘typename ActualAlloc::ResultType nsTArray_Impl<E, Alloc>::Assign(const nsTArray_Impl<E, Allocator>&) [with Allocator = nsTArrayInfallibleAllocator; ActualAlloc = nsTArrayInfallibleAllocator; E = mozilla::dom::workerinternals::JSSettings::JSGCSetting; Alloc = nsTArrayInfallibleAllocator; typename ActualAlloc::ResultType = void]’
 0:24.22 /mnt/dan/firefox.git/obj-powerpc64le-unknown-linux-gnu/dist/include/nsTArray.h:2785:7:   required from ‘CopyableTArray<E>& CopyableTArray<E>::operator=(const CopyableTArray<E>&) [with E = mozilla::dom::workerinternals::JSSettings::JSGCSetting]’
 0:24.22 /mnt/dan/firefox.git/obj-powerpc64le-unknown-linux-gnu/dist/include/mozilla/dom/workerinternals/JSSettings.h:26:8:   required from here
 0:24.22 /mnt/dan/firefox.git/obj-powerpc64le-unknown-linux-gnu/dist/include/nsTArray.h:647:13: warning: ‘void* memcpy(void*, const void*, size_t)’ writing to an object of non-trivially copyable type ‘struct mozilla::dom::workerinternals::JSSettings::JSGCSetting’; use copy-assignment or copy-initialization instead [-Wclass-memaccess]
 0:24.22   647 |       memcpy(aElements + aStart, aValues, aCount * sizeof(ElemType));
 0:24.22       |       ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 0:24.22 In file included from /mnt/dan/firefox.git/obj-powerpc64le-unknown-linux-gnu/dist/include/mozilla/dom/WorkerPrivate.h:34,
 0:24.22                  from /mnt/dan/firefox.git/ipc/glue/BackgroundImpl.cpp:29,
 0:24.22                  from Unified_cpp_ipc_glue0.cpp:2:
 0:24.22 /mnt/dan/firefox.git/obj-powerpc64le-unknown-linux-gnu/dist/include/mozilla/dom/workerinternals/JSSettings.h:27:10: note: ‘struct mozilla::dom::workerinternals::JSSettings::JSGCSetting’ declared here
 0:24.22    27 |   struct JSGCSetting {
 0:24.22       |          ^~~~~~~~~~~
 0:24.85 gmake[4]: *** [/mnt/dan/firefox.git/config/rules.mk:752: Unified_cpp_ipc_glue0.o] Chyba 1
 0:24.85 gmake[4]: Opouští se adresář „/mnt/dan/firefox.git/obj-powerpc64le-unknown-linux-gnu/ipc/glue“
 0:24.85 gmake[3]: *** [/mnt/dan/firefox.git/config/recurse.mk:74: ipc/glue/target-objects] Chyba 2
 0:24.85 gmake[3]: Opouští se adresář „/mnt/dan/firefox.git/obj-powerpc64le-unknown-linux-gnu“
 0:24.86 gmake[2]: *** [/mnt/dan/firefox.git/config/recurse.mk:34: compile] Chyba 2
 0:24.86 gmake[2]: Opouští se adresář „/mnt/dan/firefox.git/obj-powerpc64le-unknown-linux-gnu“
 0:24.86 gmake[1]: *** [/mnt/dan/firefox.git/config/rules.mk:394: default] Chyba 2
 0:24.86 gmake[1]: Opouští se adresář „/mnt/dan/firefox.git/obj-powerpc64le-unknown-linux-gnu“
 0:24.86 gmake: *** [client.mk:125: build] Chyba 2
 0:24.86 11 compiler warnings present.

It should be related to recent changes in the profiler macros (bug 1635338 or bug 1634784), bug 1637895 is another fallout.

It looks like this was regressed by bug 1553717, which introduced a second use of self under a different #ifdef.

Set release status flags based on info from the regressing bug 1553717

the fix looks good to me

https://hg.mozilla.org/mozilla-central/rev/08fb02c0e7da