interp: don't copy unknown values in runtime.sliceCopy #3901
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This was bug #3890. See the diff for details. Essentially, it means that `copy` in the interpreter was copying data that wasn't known yet, or copying data into a slice that could be read externally after the interp pass.
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Size difference with the dev branch: Binary size differencenot the same command!
go: downloading golang.org/x/text v0.3.6
tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/wifinina/ntpclient/main.go
not the same command!
go: downloading golang.org/x/text v0.3.6
tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/wifinina/udpstation/main.go
not the same command!
go: downloading github.com/eclipse/paho.mqtt.golang v1.2.0
tinygo build -size short -o ./build/test.hex -target=wioterminal ./examples/rtl8720dn/mqttsub/
before after diff
60748 60748 0 0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/adt7410/main.go
9768 9768 0 0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/adxl345/main.go
13372 13372 0 0.00% tinygo build -size short -o ./build/test.hex -target=pybadge ./examples/amg88xx
8896 8896 0 0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/apa102/main.go
11780 11780 0 0.00% tinygo build -size short -o ./build/test.hex -target=nano-33-ble ./examples/apds9960/proximity/main.go
10636 10636 0 0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/apa102/itsybitsy-m0/main.go
8140 8140 0 0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/at24cx/main.go
8484 8484 0 0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/bh1750/main.go
7708 7708 0 0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/blinkm/main.go
63192 63192 0 0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/bmi160/main.go
28064 28064 0 0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/bmp180/main.go
63260 63260 0 0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/bmp280/main.go
12432 12432 0 0.00% tinygo build -size short -o ./build/test.hex -target=trinket-m0 ./examples/bmp388/main.go
7724 7724 0 0.00% tinygo build -size short -o ./build/test.hex -target=bluepill ./examples/ds1307/sram/main.go
22052 22052 0 0.00% tinygo build -size short -o ./build/test.hex -target=bluepill ./examples/ds1307/time/main.go
68888 68888 0 0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/ds3231/main.go
4712 4712 0 0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/easystepper/main.go
24960 24960 0 0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/espat/espconsole/main.go
25160 25160 0 0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/espat/esphub/main.go
24968 24968 0 0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/espat/espstation/main.go
68640 68640 0 0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/flash/console/spi
64664 64664 0 0.00% tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/flash/console/qspi
7072 7072 0 0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/gc9a01/main.go
68032 68032 0 0.00% tinygo build -size short -o ./build/test.hex -target=feather-m0 ./examples/gps/i2c/main.go
68444 68444 0 0.00% tinygo build -size short -o ./build/test.hex -target=feather-m0 ./examples/gps/uart/main.go
8576 8576 0 0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/hcsr04/main.go
5688 5688 0 0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/hd44780/customchar/main.go
5652 5652 0 0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/hd44780/text/main.go
10716 10716 0 0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/hd44780i2c/main.go
14792 14792 0 0.00% tinygo build -size short -o ./build/test.hex -target=nano-33-ble ./examples/hts221/main.go
15896 15896 0 0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/hub75/main.go
10220 10220 0 0.00% tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/ili9341/basic
11024 11024 0 0.00% tinygo build -size short -o ./build/test.hex -target=xiao ./examples/ili9341/basic
29212 29212 0 0.00% tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/ili9341/pyportal_boing
10248 10248 0 0.00% tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/ili9341/scroll
11100 11100 0 0.00% tinygo build -size short -o ./build/test.hex -target=xiao ./examples/ili9341/scroll
267468 267468 0 0.00% tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/ili9341/slideshow
12124 12124 0 0.00% tinygo build -size short -o ./build/test.hex -target=circuitplay-express ./examples/lis3dh/main.go
14148 14148 0 0.00% tinygo build -size short -o ./build/test.hex -target=nano-33-ble ./examples/lps22hb/main.go
26156 26156 0 0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/lsm303agr/main.go
12620 12620 0 0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/lsm6ds3/main.go
11084 11084 0 0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/mag3110/main.go
10272 10272 0 0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/mcp23017/main.go
10704 10704 0 0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/mcp23017-multiple/main.go
9996 9996 0 0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/mcp3008/main.go
66816 66816 0 0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/mcp2515/main.go
21968 21968 0 0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/microbitmatrix/main.go
22024 22024 0 0.00% tinygo build -size short -o ./build/test.hex -target=microbit-v2 ./examples/microbitmatrix/main.go
8636 8636 0 0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/mma8653/main.go
8420 8420 0 0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/mpu6050/main.go
74928 74928 0 0.00% tinygo build -size short -o ./build/test.hex -target=p1am-100 ./examples/p1am/main.go
12268 12268 0 0.00% tinygo build -size short -o ./build/test.hex -target=pico ./examples/pca9685/main.go
6112 6112 0 0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/pcd8544/setbuffer/main.go
5124 5124 0 0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/pcd8544/setpixel/main.go
2889 2889 0 0.00% tinygo build -size short -o ./build/test.hex -target=arduino ./examples/servo
8092 8092 0 0.00% tinygo build -size short -o ./build/test.hex -target=pybadge ./examples/shifter/main.go
56340 56340 0 0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/sht3x/main.go
56312 56312 0 0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/shtc3/main.go
6452 6452 0 0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/ssd1306/i2c_128x32/main.go
5960 5960 0 0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/ssd1306/spi_128x64/main.go
5728 5728 0 0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/ssd1331/main.go
6420 6420 0 0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/st7735/main.go
6316 6316 0 0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/st7789/main.go
17368 17368 0 0.00% tinygo build -size short -o ./build/test.hex -target=circuitplay-express ./examples/thermistor/main.go
10284 10284 0 0.00% tinygo build -size short -o ./build/test.hex -target=circuitplay-bluefruit ./examples/tone
10952 10952 0 0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/tm1637/main.go
9536 9536 0 0.00% tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/touch/resistive/fourwire/main.go
12532 12532 0 0.00% tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/touch/resistive/pyportal_touchpaint/main.go
15852 15852 0 0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/vl53l1x/main.go
13876 13876 0 0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/vl6180x/main.go
6484 6484 0 0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/waveshare-epd/epd2in13/main.go
6036 6036 0 0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/waveshare-epd/epd2in13x/main.go
6312 6312 0 0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/waveshare-epd/epd4in2/main.go
137260 137260 0 0.00% go: downloading golang.org/x/text v0.3.6
137268 137268 0 0.00% go: downloading golang.org/x/text v0.3.6
137528 137528 0 0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/wifinina/tcpclient/main.go
137660 137660 0 0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/wifinina/webclient/main.go
7120 7120 0 0.00% tinygo build -size short -o ./build/test.hex -target=circuitplay-express ./examples/ws2812
5452 5452 0 0.00% tinygo build -size short -o ./build/test.bin -target=m5stamp-c3 ./examples/ws2812
61588 61588 0 0.00% tinygo build -size short -o ./build/test.hex -target=feather-nrf52840 ./examples/is31fl3731/main.go
1565 1565 0 0.00% tinygo build -size short -o ./build/test.hex -target=arduino ./examples/ws2812
896 896 0 0.00% tinygo build -size short -o ./build/test.hex -target=digispark ./examples/ws2812
32332 32332 0 0.00% tinygo build -size short -o ./build/test.hex -target=trinket-m0 ./examples/bme280/main.go
16816 16816 0 0.00% tinygo build -size short -o ./build/test.hex -target=circuitplay-express ./examples/microphone/main.go
11484 11484 0 0.00% tinygo build -size short -o ./build/test.hex -target=circuitplay-express ./examples/buzzer/main.go
13076 13076 0 0.00% tinygo build -size short -o ./build/test.hex -target=trinket-m0 ./examples/veml6070/main.go
7012 7012 0 0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/l293x/simple/main.go
8968 8968 0 0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/l293x/speed/main.go
6980 6980 0 0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/l9110x/simple/main.go
9524 9524 0 0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/l9110x/speed/main.go
7464 7464 0 0.00% tinygo build -size short -o ./build/test.hex -target=nucleo-f103rb ./examples/shiftregister/main.go
8336 8336 0 0.00% tinygo build -size short -o ./build/test.hex -target=hifive1b ./examples/ssd1351/main.go
13364 13364 0 0.00% tinygo build -size short -o ./build/test.hex -target=circuitplay-express ./examples/lis2mdl/main.go
8516 8516 0 0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/max72xx/main.go
77260 77260 0 0.00% tinygo build -size short -o ./build/test.hex -target=feather-m0 ./examples/dht/main.go
70732 70732 0 0.00% tinygo build -size short -o ./build/test.hex -target=xiao ./examples/pcf8563/alarm/
7492 7492 0 0.00% tinygo build -size short -o ./build/test.hex -target=xiao ./examples/pcf8563/clkout/
70404 70404 0 0.00% tinygo build -size short -o ./build/test.hex -target=xiao ./examples/pcf8563/time/
70668 70668 0 0.00% tinygo build -size short -o ./build/test.hex -target=xiao ./examples/pcf8563/timer/
12112 12112 0 0.00% tinygo build -size short -o ./build/test.hex -target=pico ./examples/qmi8658c/main.go
9024 9024 0 0.00% tinygo build -size short -o ./build/test.hex -target=feather-m0 ./examples/ina260/main.go
9432 9432 0 0.00% tinygo build -size short -o ./build/test.hex -target=nucleo-l432kc ./examples/aht20/main.go
72028 72028 0 0.00% tinygo build -size short -o ./build/test.hex -target=feather-m4 ./examples/sdcard/console/
82464 82464 0 0.00% tinygo build -size short -o ./build/test.hex -target=wioterminal ./examples/rtl8720dn/webclient/
71808 71808 0 0.00% tinygo build -size short -o ./build/test.hex -target=wioterminal ./examples/rtl8720dn/webserver/
98584 98584 0 0.00% go: downloading github.com/eclipse/paho.mqtt.golang v1.2.0
60304 60304 0 0.00% tinygo build -size short -o ./build/test.hex -target=feather-m4 ./examples/i2csoft/adt7410/
10400 10400 0 0.00% tinygo build -size short -o ./build/test.elf -target=wioterminal ./examples/axp192/m5stack-core2-blinky/
9076 9076 0 0.00% tinygo build -size short -o ./build/test.uf2 -target=pico ./examples/xpt2046/main.go
14572 14572 0 0.00% tinygo build -size short -o ./build/test.hex -target=nucleo-wl55jc ./examples/sx126x/lora_rxtx/
25892 25892 0 0.00% tinygo build -size short -o ./build/test.uf2 -target=pico ./examples/ssd1289/main.go
11356 11356 0 0.00% tinygo build -size short -o ./build/test.hex -target=pico ./examples/irremote/main.go
11340 11340 0 0.00% tinygo build -size short -o ./build/test.hex -target=badger2040 ./examples/uc8151/main.go
10472 10472 0 0.00% tinygo build -size short -o ./build/test.uf2 -target=pico ./examples/scd4x/main.go
8968 8968 0 0.00% tinygo build -size short -o ./build/test.uf2 -target=circuitplay-express ./examples/makeybutton/main.go
9732 9732 0 0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/ds18b20/main.go
81336 81336 0 0.00% tinygo build -size short -o ./build/test.hex -target=nucleo-wl55jc ./examples/lora/lorawan/atcmd/
15744 15744 0 0.00% tinygo build -size short -o ./build/test.uf2 -target=pico ./examples/as560x/main.go
9960 9960 0 0.00% tinygo build -size short -o ./build/test.uf2 -target=pico ./examples/mpu6886/main.go
8124 8124 0 0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/ttp229/main.go
3469022 3469022 0 0.00% sum
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deadprogram
approved these changes
Sep 10, 2023
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This was bug #3890. See the diff for details.
Essentially, it means that
copyin the interpreter was copying data that wasn't known yet, or copying data into a slice that could be read externally after the interp pass.