i2c runtime error ... todo!();

[pdgilbert]

On bluepill I am checking the examples as in stm32-rs/stm32f4xx-hal#828. Example sht30-em-semi gives a "not yet implemented" runtime error at

Remote target In: sht30_em_semi::__cortex_m_rt_main         L301  PC: 0x80003b6
at .cargo/git/checkouts/stm32f1xx-hal-bb9d214e810c7b47/6c5dc88/src/i2c/block
ing.rs:301
301          todo!();        

This is in fn transaction_slice

(Examples aht20-bl-semi, aht20-dr-semi, aht20-em-semi, shtc3-semi, xca9548a-aht20-bl, xca9548a-aht20-dr, and xca9548a-aht20-em all work.)

[burrbull]

See https://github.com/stm32-rs/stm32f4xx-hal/blob/585dd0f30443c45a1be9f6483fd480b141d819a2/src/i2c.rs#L627 for implementation example.