Basic Infos

• This issue complies with the issue POLICY doc.
• I have read the documentation at readthedocs and the issue is not addressed there.
• [how do I do this?] I have tested that the issue is present in current master branch (aka latest git).
• I have searched the issue tracker for a similar issue.
• If there is a stack dump, I have decoded it.
• I have filled out all fields below.

Platform

• Hardware: [ESP-12]
• Core Version: [3.1.2]
• Development Env: [Arduino IDE 1.8.19]
• Operating System: [Ubuntu]

Settings in IDE 1.8.19

--board esp8266:esp8266:nodemcuv2:xtal=80,vt=flash,exception=disabled,ssl=all,eesz=4M2M,led=2,ip=lm2f,dbg=Disabled,lvl=None____,wipe=none,baud=921600

• Module: [Nodemcu]
• Flash Mode: [???]
• Flash Size: [4MB/2MB]
• lwip Variant: [v2 Lower Memory]
• Reset Method: [???]
• Flash Frequency: [???]
• CPU Frequency: [80Mhz]
• Upload Using: [SERIAL]
• Upload Speed: [115200]

Problem Description

Prior to 3.1.x (e.g. 3.0.2), the compiler printed a summary of the static and flash memory usage that was formatted like this:

Executable segment sizes: ICACHE : 32768	- flash instruction cache IROM : 231500	- code in flash	(default or ICACHE_FLASH_ATTR) IRAM : 26217 / 32768 - code in IRAM	(IRAM_ATTR, ISRs...) DATA : 1496 )	- initialized variables (global, static) in RAM/HEAP RODATA : 876 ) / 81920 - constants	(global, static) in RAM/HEAP BSS	: 25520 )	- zeroed variables	(global, static) in RAM/HEAP Sketch uses 260089 bytes (24%) of program storage space. Maximum is 1044464 bytes. Global variables use 27892 bytes (34%) of dynamic memory, leaving 54028 bytes for local variables. Maximum is 81920 bytes. 

In 3.1.0, (and verified to be the same in 3.1.2), that changed to something like this, with a bunch of ? question marks, with no final summary lines:

. Variables and constants in RAM (global, static), used 28008 / 80192 bytes (34%) ??? SEGMENT BYTES	DESCRIPTION ????????? DATA	1496	initialized variables ????????? RODATA 920	constants ????????? BSS	25592	zeroed variables . Instruction RAM (IRAM_ATTR, ICACHE_RAM_ATTR), used 59143 / 65536 bytes (90%) ??? SEGMENT BYTES	DESCRIPTION ????????? ICACHE 32768	reserved space for flash instruction cache ????????? IRAM	26375	code in IRAM . Code in flash (default, ICACHE_FLASH_ATTR), used 231636 / 1048576 bytes (22%) ??? SEGMENT BYTES	DESCRIPTION ????????? IROM	231636 code in flash 

Expected Result

1. Those ????????? seem to indicate corrupted strings.

2. Print the 2 summary lines in the format of:

Sketch uses 260089 bytes (24%) of program storage space. Maximum is 1044464 bytes. Global variables use 27892 bytes (34%) of dynamic memory, leaving 54028 bytes for local variables. Maximum is 81920 bytes. 

for readability and compatibility with other cores.

MCVE Sketch

A blank sketch is sufficient to see this.

#include <Arduino.h> void setup() {} void loop() {}

Debug Messages