IDF v4.0: coredump to flash never succeeds (WDT interrupt)

[cpehonk]

Hi all,
I tried to use the new VisualGDB release 5.5.1 with IDF v4.0 gnu toolchain. Now, setting coredump to flash will lead to a wdt interrupt:
I (26202) esp_core_dump_flash: Save core dump to flash...
I (26208) esp_core_dump_common: Found tasks: (10)!
D (26213) esp_core_dump_port: Current task 3ffbccac EXIT/PC/PS/A0/SP 8 400d9643 60f30 800d8278 3ffbca50
D (26222) esp_core_dump_port: Stack len = 788 (3ffbc990 3ffbcca4)
D (26229) esp_core_dump_port: Task 3ffbdb84 EXIT/PC/PS/A0/SP 40082934 4015836a 60530 800d487d 3ffbda90
D (26238) esp_core_dump_port: Stack len = 428 (3ffbd9d0 3ffbdb7c)
D (26244) esp_core_dump_port: Task 3ffbd418 EXIT/PC/PS/A0/SP 40082934 4015836a 60930 800d487d 3ffbd330
D (26254) esp_core_dump_port: Stack len = 416 (3ffbd270 3ffbd410)
D (26260) esp_core_dump_port: Task 3ffc05c0 EXIT/PC/PS/A0/SP 40082934 4008fc98 60330 80108274 3ffc0470
D (26269) esp_core_dump_port: Stack len = 520 (3ffc03b0 3ffc05b8)
D (26275) esp_core_dump_port: Task 3ffbe5e4 EXIT/PC/PS/A0/SP 40082934 40081750 60c30 80091b1a 3ffbe4d0
D (26285) esp_core_dump_port: Stack len = 460 (3ffbe410 3ffbe5dc)
D (26291) esp_core_dump_port: Task 3ffc15bc EXIT/PC/PS/A0/SP 40082934 40081750 60130 8008fc98 3ffc1460
D (26300) esp_core_dump_port: Stack len = 532 (3ffc13a0 3ffc15b4)
D (26306) esp_core_dump_port: Task 3ffbb4c8 EXIT/PC/PS/A0/SP 40082934 4008fc98 60d30 800821c3 3ffbb3e0
D (26316) esp_core_dump_port: Stack len = 416 (3ffbb320 3ffbb4c0)
D (26322) esp_core_dump_port: Task 3ffafa84 EXIT/PC/PS/A0/SP 40082934 40081750 60930 8008fc98 3ffaf970
D (26331) esp_core_dump_port: Stack len = 460 (3ffaf8b0 3ffafa7c)
D (26337) esp_core_dump_port: Task 3ffc2e54 EXIT/PC/PS/A0/SP 40082934 40081750 60730 8008fc98 3ffc2d00
D (26347) esp_core_dump_port: Stack len = 524 (3ffc2c40 3ffc2e4c)
D (26353) esp_core_dump_port: Task 3ffafe70 EXIT/PC/PS/A0/SP 40082934 40081750 60d30 8008fc98 3ffbaf60
D (26362) esp_core_dump_port: Stack len = 456 (3ffbaea0 3ffbb068)
D (26368) esp_core_dump_common: Core dump len = 8696 (10 0)
ets Jun 8 2016 00:22:57

rst:0x9 (RTCWDT_SYS_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0018,len:4
load:0x3fff001c,len:6512
ho 0 tail 12 room 4
load:0x40078000,len:13816
ho 0 tail 12 room 4
load:0x40080400,len:4260
entry 0x400806e4
W (65) boot: PRO CPU has been reset by WDT.
W (65) boot: WDT reset info: PRO CPU PC=0x4009212e
W (65) boot: WDT reset info: APP CPU PC=0x4015836a (waiti mode)

Timeout for WDT is configured to 30 seconds. What am I doing wrong ?
Greetings,
Chris

[jwwest]

Anyone? Bueller?
I am seeing the exact same issue. It would be nice to know if this was fixed, and if so which version of the IDF.