Issues

js: a std function that a test file imports again is left out of the extracted test file, and the ReferenceError is reported as a bubble

temperlang/temper#630 · opened

on Oct 21, 2026

csharp: an `if` as the arm of a sealed `when` is emitted unbraced, so the `else throw` that closes the `when` binds to the inner `if`, and the arm's common case throws

temperlang/temper#629 · opened

on Oct 21, 2026

`new Date(2023, 4, 31)` is 1 May on js and 31 April on cpp, and each backend's `Date.fromIsoString` accepts a different set of strings

temperlang/temper#622 · opened

on Oct 12, 2026

1

`DenseBitVector.set` loses a bit set at index 128 or above on js, whatever the capacity, and on cpp any `set` or `get` past the capacity kills the program

temperlang/temper#621 · opened

on Oct 12, 2026

1

js: `Mapped.getOr` returns the fallback for a key that is present with a null value

temperlang/temper#620 · opened

on Oct 12, 2026

1

A function's last expression is dropped after a loop that holds both a `return` and a `continue` or `break`

temperlang/temper#618 · opened

on Oct 12, 2026

1

A generic function passed as a value with its type argument, `identity<Int>`, fails at run time on every backend except the interpreter

temperlang/temper#619 · opened

on Oct 12, 2026

1

cpp: a library named `nan`, `time`, `random` or after another C library function does not compile, because its namespace collides with the function

temperlang/temper#612 · opened

on Oct 9, 2026

`temper run -b py` fails with ModuleNotFoundError for a library whose name has a dash, unless the build records a dependency from that library on another

temperlang/temper#609 · opened

on Oct 9, 2026

A generator's `done`, `is ValueResult`, and `nextSafe()` on its last step break on most backends

temperlang/temper#579 · opened

on Oct 8, 2026

py: a local `var` that holds a function and is reassigned gets `nonlocal` in its own function, and the module fails to import

temperlang/temper#559 · opened

on Oct 8, 2026

cpp: `String.toFloat64` bubbles on subnormal, underflowing and overflowing inputs, because `std::stod` throws on range errors

temperlang/temper#557 · opened

on Oct 8, 2026

`toInt32`, `toInt64` and `toFloat64` accept inputs that JSON does not, and the backends disagree on which

temperlang/temper#556 · opened

on Oct 8, 2026

Float64 `floor`, `ceil` and `round` give different answers per backend: py returns Python ints, `round` has three tie rules, java's `round` saturates

temperlang/temper#555 · opened

on Oct 8, 2026

`Float64.toString` gives a different string for the same number on each backend, and on lua and the interpreter some strings do not read back as the same number

temperlang/temper#554 · opened

on Oct 8, 2026

1

Interpreter: an `await` inside a loop body always takes the `orelse` branch

temperlang/temper#552 · opened

on Oct 8, 2026

js: a promise broken before its async block awaits it kills node with UnhandledPromiseRejection, though the `await` has an `orelse`

temperlang/temper#551 · opened

on Oct 8, 2026

java, rust and cpp crash translating an async block that keeps a `List` local across an `await`

temperlang/temper#549 · opened

on Oct 8, 2026

An async block whose last statement is an `if`, after an `await`, puts a garbage statement in each branch on java, rust and cpp

temperlang/temper#542 · opened

on Oct 8, 2026

Regex literals read `{3}` and `{2,3}` as literal text, though `std/regex` documents them as counted repetition

temperlang/temper#541 · opened

on Oct 8, 2026

Top-level assignments to a `var` run before the statements written above them

temperlang/temper#540 · opened

on Oct 8, 2026

cpp: call arguments run right to left under x86-64 g++, so a read after a call sees the old value

temperlang/temper#539 · opened

on Oct 8, 2026

A `Void` function or method whose body ends in `panic()` or `bubble()` fails to build on js and rust

temperlang/temper#536 · opened

on Oct 3, 2026

1

A `let` assigned a constant on only one branch builds without an error and reads as that constant

temperlang/temper#528 · opened

on Oct 3, 2026

Java's generated main exits after 10 seconds while an async block is still running, with exit code 0

temperlang/temper#524 · opened

on Oct 3, 2026

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Issues

js: a std function that a test file imports again is left out of the extracted test file, and the ReferenceError is reported as a bubble

csharp: an `if` as the arm of a sealed `when` is emitted unbraced, so the `else throw` that closes the `when` binds to the inner `if`, and the arm's common case throws

`new Date(2023, 4, 31)` is 1 May on js and 31 April on cpp, and each backend's `Date.fromIsoString` accepts a different set of strings

`DenseBitVector.set` loses a bit set at index 128 or above on js, whatever the capacity, and on cpp any `set` or `get` past the capacity kills the program

js: `Mapped.getOr` returns the fallback for a key that is present with a null value

A function's last expression is dropped after a loop that holds both a `return` and a `continue` or `break`

A generic function passed as a value with its type argument, `identity<Int>`, fails at run time on every backend except the interpreter

cpp: a library named `nan`, `time`, `random` or after another C library function does not compile, because its namespace collides with the function

`temper run -b py` fails with ModuleNotFoundError for a library whose name has a dash, unless the build records a dependency from that library on another

A generator's `done`, `is ValueResult`, and `nextSafe()` on its last step break on most backends

py: a local `var` that holds a function and is reassigned gets `nonlocal` in its own function, and the module fails to import

cpp: `String.toFloat64` bubbles on subnormal, underflowing and overflowing inputs, because `std::stod` throws on range errors

`toInt32`, `toInt64` and `toFloat64` accept inputs that JSON does not, and the backends disagree on which

Float64 `floor`, `ceil` and `round` give different answers per backend: py returns Python ints, `round` has three tie rules, java's `round` saturates

`Float64.toString` gives a different string for the same number on each backend, and on lua and the interpreter some strings do not read back as the same number

Interpreter: an `await` inside a loop body always takes the `orelse` branch

js: a promise broken before its async block awaits it kills node with UnhandledPromiseRejection, though the `await` has an `orelse`

java, rust and cpp crash translating an async block that keeps a `List` local across an `await`

An async block whose last statement is an `if`, after an `await`, puts a garbage statement in each branch on java, rust and cpp

Regex literals read `{3}` and `{2,3}` as literal text, though `std/regex` documents them as counted repetition

Top-level assignments to a `var` run before the statements written above them

cpp: call arguments run right to left under x86-64 g++, so a read after a call sees the old value

A `Void` function or method whose body ends in `panic()` or `bubble()` fails to build on js and rust

A `let` assigned a constant on only one branch builds without an error and reads as that constant

Java's generated main exits after 10 seconds while an async block is still running, with exit code 0