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### Describe the bug
Opening a CSV file with `open file.csv` discards leading zeros from plain integers. For example, `0123` becomes `123`. Leading zeros in integers may be significant, for example…
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A similar starting point to https://github.com/nim-lang/Nim/issues/23784
The following confuses the type inference with the error
```
[...]/nim-2.0.8/lib/system.nim(700, 10) Error: invalid type…
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## Compiler version
3.3.1
3.4.0-RC4
## Minimized code
```Scala
// Error: Cannot prove that A[U]
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**Describe the bug**
After adding a new, totally unrelated stdlib function, I am getting a type inference error on an unrelated section of the std.x library.
```
xls/dslx/stdlib/std.x?l=1159:21-1…
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```
_
_ _ _(_)_ | Documentation: https://docs.julialang.org
(_) | (_) (_) |
_ _ _| |_ __ _ | Type "?" for help, "]?" for Pkg help.
| | | | | | |/ …
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### 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/iss…
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### Command
```
javac \
-J--add-exports=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED \
-J--add-exports=jdk.compiler/com.sun.tools.javac.code=ALL-UNNAMED \
-J--add-exports=jdk.compiler…
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### Reproduction link
[https://stackblitz.com/edit/react-ts-8uzkys?file=App.tsx](https://stackblitz.com/edit/react-ts-8uzkys?file=App.tsx)
### Steps to reproduce
Seemed typescript failed to i…
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**TypeScript Version:** 3.1
**Search Terms:** type inference, type guard, narrowing, lost, assignment
**Code**
```ts
let a: unknown = 'x';
if (typeof a === 'string') {
// a inferred a…
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### Description
In a generic function that takes a typed-throwing function and an error of the same type as parameters, type inference is failing when trying to call the function and pass in an ins…