nRF52840DK build error: src/jslex.o make: *** [espruino_2v08.220_nrf52840.elf] Error 1

Sat 2021.09.25

My original continuation is actually a unique new error specific to the DK nRF52840DK

post #21 WebIDE locks up while loading require("neopixel")

Progress made after successful install of SDK15, but a new error surfaced: make: *** [espruino_2v08.220_nrf52840.elf] Error 1

CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/libraries/atomic/nrf_atomic.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/libraries/atomic_flags/nrf_atflags.oCC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/ble/ble_link_ctx_manager/ble_link_ctx_manager.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/libraries/util/app_error_handler_gcc.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/ble/peer_manager/pm_mutex.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/ble/common/ble_advdata.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/ble/common/ble_conn_params.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/ble/common/ble_srv_common.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/ble/common/ble_conn_state.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/ble/ble_services/ble_nus/ble_nus.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/ble/peer_manager/peer_manager.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/ble/peer_manager/peer_id.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/ble/peer_manager/peer_database.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/ble/peer_manager/peer_data_storage.oCC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/ble/peer_manager/pm_buffer.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/ble/peer_manager/id_manager.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/ble/peer_manager/security_manager.o
targetlibs/nrf5x_15/components/ble/peer_manager/pm_buffer.c: In function 'pm_buffer_block_acquire':
targetlibs/nrf5x_15/components/ble/peer_manager/pm_buffer.c:104:46: warning: comparison of integer expressions of different signedness: 'int' and 'uint32_t' {aka 'long unsigned int'} [-Wsign-compare]
             if ((i - first_locked_mutex + 1) == n_blocks)
                                              ^~
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/ble/peer_manager/security_dispatcher.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/ble/peer_manager/gatt_cache_manager.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/ble/peer_manager/gatts_cache_manager.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/libraries/timer/app_timer.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/libraries/fds/fds.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/libraries/queue/nrf_queue.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/libraries/util/app_util_platform.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/libraries/util/sdk_mapped_flags.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/libraries/util/app_error.o
targetlibs/nrf5x_15/components/libraries/fds/fds.c: In function 'write_execute':
targetlibs/nrf5x_15/components/libraries/fds/fds.c:1237:16: warning: this statement may fall through [-Wimplicit-fallthrough=]
             if (!record_find_by_desc(&desc, &page))
                ^
targetlibs/nrf5x_15/components/libraries/fds/fds.c:1245:9: note: here
         case FDS_OP_WRITE_HEADER_BEGIN:
         ^~~~
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/libraries/util/nrf_assert.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/softdevice/common/nrf_sdh.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/softdevice/common/nrf_sdh_ble.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/softdevice/common/nrf_sdh_soc.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/libraries/experimental_section_vars/nrf_section_iter.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/libraries/fstorage/nrf_fstorage.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/libraries/fstorage/nrf_fstorage_sd.oCC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/libraries/atomic_fifo/nrf_atfifo.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/libraries/strerror/nrf_strerror.o
CC /mnt/c/Users/robin/Espruino/targetlibs/nrf5x_15/components/libraries/balloc/nrf_balloc.o
LD espruino_2v08.220_nrf52840.elf
src/jslex.o: file not recognized: file format not recognized
collect2: error: ld returned 1 exit status
make/targets/ARM.make:2: recipe for target 'espruino_2v08.220_nrf52840.elf' failed
make: *** [espruino_2v08.220_nrf52840.elf] Error 1
rgc@DESKTOP-R7T0VUC:/mnt/c/Users/robin/Espruino$