Issues

rp2/RP2040: frozen `@micropython.native` functions HardFault (mpy-tool.py aligns native code to 2 bytes, prelude index is read as a word)

micropython/micropython#19830 · opened

on Oct 30, 2026

RFC: Speed up same-size slice assignment

micropython/micropython#19806 · opened

on Oct 23, 2026

3

docs: undocumented callback object returned by Pin.irq

micropython/micropython#19798 · opened

on Oct 22, 2026

1

stm32: WIZnet/lwIP mpremote soft reset hangs when its SPI bus is deinitialized

micropython/micropython#19790 · opened

on Oct 20, 2026

6

py/parsenum: with MICROPY_LONGINT_IMPL_LONGLONG, int("18446744073709551616") returns 0 instead of raising OverflowError

micropython/micropython#19786 · opened

on Oct 19, 2026

py/obj.h: default mp_float_hash() casts out-of-range floats to mp_int_t (undefined behaviour)

micropython/micropython#19785 · opened

on Oct 19, 2026

py/gc: no_sanitize_address on gc_get_ptr() is not applied with clang, so ASan reports every gc_collect()

micropython/micropython#19784 · opened

on Oct 19, 2026

1

asyncio.wait_for and socket.readexactly race condition on timeout

micropython/micropython#19779 · opened

on Oct 17, 2026

5

cannot include math.nan in frozen content

micropython/micropython#19778 · opened

on Oct 17, 2026

3

esp32: filesystem extends beyond 16MiB on flash chips the IDF can only access up to 16MiB

micropython/micropython#19766 · opened

on Oct 14, 2026

1

clang "addition of unsigned offset overflows" diagnostics

micropython/micropython#19758 · opened

on Oct 11, 2026

re.sub callback can retain a stack-backed match object

micropython/micropython#19756 · opened

on Oct 10, 2026

Reentrant integer conversion leaves stale writable buffer pointers

micropython/micropython#19755 · opened

on Oct 10, 2026

Reentrant integer conversion can invalidate list index and slice operations

micropython/micropython#19754 · opened

on Oct 10, 2026

Reentrant equality can invalidate list storage in count and comparison

micropython/micropython#19753 · opened

on Oct 10, 2026

modlwip: socket timeout ignored in send when out of memory

micropython/micropython#19746 · opened

on Oct 4, 2026

stm32: a HardFault resets without a trace and MemManage/BusFault/UsageFault hang; add a board hook to record faults

micropython/micropython#19745 · opened

on Oct 3, 2026

Treat TYPE_CHECKING = False as an internal const value

micropython/micropython#19734 · opened

on Sep 29, 2026

Add `machine.mem64` support

micropython/micropython#19719 · opened

on Sep 20, 2026

3

asyncio.run(...) hangs and neither returns nor raises after asyncio.new_event_loop() called within

micropython/micropython#19718 · opened

on Sep 20, 2026

2

Store ROM qstr strings in a blob with 16-bit offsets

micropython/micropython#19715 · opened

on Sep 17, 2026

4

`bin()`, `hex()` and `oct()` ignore `index`

micropython/micropython#19714 · opened

on Sep 17, 2026

3

modlwip: non-blocking socket blocks in send when out of memory

micropython/micropython#19704 · opened

on Sep 16, 2026

OpenMV Feature: GC Scan Improvments.

micropython/micropython#19703 · opened

on Sep 16, 2026

2

Support some ANSI escape codes in pyexec repl

micropython/micropython#19702 · opened

on Sep 15, 2026

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Issues

rp2/RP2040: frozen `@micropython.native` functions HardFault (mpy-tool.py aligns native code to 2 bytes, prelude index is read as a word)

RFC: Speed up same-size slice assignment

docs: undocumented callback object returned by Pin.irq

stm32: WIZnet/lwIP mpremote soft reset hangs when its SPI bus is deinitialized

py/parsenum: with MICROPY_LONGINT_IMPL_LONGLONG, int("18446744073709551616") returns 0 instead of raising OverflowError

py/obj.h: default mp_float_hash() casts out-of-range floats to mp_int_t (undefined behaviour)

py/gc: no_sanitize_address on gc_get_ptr() is not applied with clang, so ASan reports every gc_collect()

asyncio.wait_for and socket.readexactly race condition on timeout

cannot include math.nan in frozen content

esp32: filesystem extends beyond 16MiB on flash chips the IDF can only access up to 16MiB

clang "addition of unsigned offset overflows" diagnostics

re.sub callback can retain a stack-backed match object

Reentrant integer conversion leaves stale writable buffer pointers

Reentrant integer conversion can invalidate list index and slice operations

Reentrant equality can invalidate list storage in count and comparison

modlwip: socket timeout ignored in send when out of memory

stm32: a HardFault resets without a trace and MemManage/BusFault/UsageFault hang; add a board hook to record faults

Treat TYPE_CHECKING = False as an internal const value

Add `machine.mem64` support

asyncio.run(...) hangs and neither returns nor raises after asyncio.new_event_loop() called within

Store ROM qstr strings in a blob with 16-bit offsets

`bin()`, `hex()` and `oct()` ignore `index`

modlwip: non-blocking socket blocks in send when out of memory

OpenMV Feature: GC Scan Improvments.

Support some ANSI escape codes in pyexec repl

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