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Lean 4 programming language and theorem prover

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### Description #2462 added support for renaming, but the current implementation does not correctly deal with namespaces: ``` namespace Bar structure Foo where a : Nat def foobar (f :...

bug
server
P-medium

In the following example, `congr` fails on the term `id f a`: ``` example (a b : Nat) (f : Nat → Nat) : id f a = id f...

bug
P-medium

This papercut in error reporting has been causing me mild frustration and prevented me from figuring out syntax by trying, maybe it can be improved: ``` import Lean def bar...

bug
P-medium

### Prerequisites * [X] Put an X between the brackets on this line if you have done all of the following: * Check that your issue is not already [filed](https://github.com/leanprover/lean4/issues)....

bug
P-medium

I am trying to see if removing redundant constraints from https://github.com/leanprover/lean4/pull/5657 helps `omega`. In doing so, I accidentally deleted what I think is an irredundant constraint. This problem makes omega...

toolchain-available
P-high

### Prerequisites Please put an X between the brackets as you perform the following steps: * [X] Check that your issue is not already filed: https://github.com/leanprover/lean4/issues * [X] Reduce the...

bug
P-medium

### Prerequisites Please put an X between the brackets as you perform the following steps: * [x] Check that your issue is not already filed: https://github.com/leanprover/lean4/issues * [x] Reduce the...

bug
P-medium

``` % g++ test.cpp -o test -lleanshared -lreverseffiwithmathlib ld: __DATA_CONST segment missing SG_READ_ONLY flag in '/Users/cruis/Documents/ReverseFFIwithMathlib/.lake/build/lib/libreverseffiwithmathlib.dylib' clang: error: linker command failed with exit code 1 (use -v to see invocation)...

bug
P-medium

### Prerequisites Please put an X between the brackets as you perform the following steps: * [ ] Check that your issue is not already filed: https://github.com/leanprover/lean4/issues * [x] Reduce...

bug
depends on new code generator
P-medium