stlink: [regression] Unable to flash with latest revision of master - STM32F2/F4/L4

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• Programmer/board type: stlink/v2
• Programmer firmware version: Not sure
• Operating system: Mac OS X
• Stlink tools version and/or git commit hash: 6a9d390a729f381ecec45f212354bfe98e27790f
• Stlink commandline tool name: st-flash
• Target chip (and optional board): STM32L476JG (STSW-STLKT01V1)

A as-detailed description possible of the problem with debug output when available.

Output:

Release$ st-flash write ~/data/input/st-ces/lib/qxostlib-datalog-20190104112820-ed73f5.bin 0x8000000 st-flash 1.4.0-58-g6a9d390
2019-01-14T16:35:23 INFO common.c: Loading device parameters.... 
2019-01-14T16:35:23 INFO common.c: Device connected is: L4 device, id 0x10076415
2019-01-14T16:35:23 INFO common.c: SRAM size: 0x18000 bytes (96 KiB), Flash: 0x100000 bytes (1024 KiB) in pages of 2048 bytes
2019-01-14T16:35:23 INFO common.c: Attempting to write 109160 (0x1aa68) bytes to stm32 address: 134217728 (0x8000000) Flash page at addr: 0x0801a800 erasedEraseFlash - Page:0x35 Size:0x800
2019-01-14T16:35:24 INFO common.c: Finished erasing 54 pages of 2048 (0x800) bytes 
2019-01-14T16:35:24 INFO common.c: Starting Flash write for F2/F4/L4
2019-01-14T16:35:24 INFO flash_loader.c: Successfully loaded flash loader in sram size: 32768 2019-01-14T16:35:27 ERROR flash_loader.c: flash loader run error
2019-01-14T16:35:27 ERROR common.c: stlink_flash_loader_run(0x8000000) failed! == -1 stlink_fwrite_flash() == -1

Expected/description: When we revert to ae717b945de revision the command goes back to working, for some reason it doesn't work on master

Thank you, The stlink project maintainers