Updating from DeviceOS 1.4.4 to 1.5.0-rc.1 -> SOS Panic 1

Firmware
18

@peekay123, this is why we all need to get stuck into this issue - “breaking” upgrades need to be understood and squashed asap otherwise we could be stuck at a particular version!

The evidence (app does not event start) could well be the compiler when it is targetting 1.5.0-rc.1…

Here is the list from Particle Device OS Updates Thread of the compiler/environment changes:

  • Enables C++14 chrono string literals for wiring APIs #1709
  • [Gen 3] Implements persistent antenna selection ( Mesh.selectAntenna() ) #1933
  • GCC 8 support #1971
  • Implements EnumFlags class for bitwise operations on C++ enum classes #1978
  • Adds missing platforms to manifest.json #1959
  • Prevents expansion of EXTRA_CFLAGS variable #2012
  • Fixes a call to objdump when the compiler is not in PATH #1961
  • [gcc] Ensure GPIO pinmap is initialized on first use #1963

Is it possible that one or more of these changes has an undesirable side effect?