Syntax error for passing kwargs to a function inside fstrings

[TotallyNotChase]

Environment data

• Language Server version: 2020.6.1
• OS and version: Microsoft Windows [Version 10.0.19041.329]
• Python version (& distribution if applicable, e.g. Anaconda): Python 3.7.4

Expected behaviour

Passing a dictionary to a function inside an fstring should not show any syntax errors.

Actual behaviour

Pylance shows syntax error when encountering a dict ({}) inside an fstring

Logs

Doubt the logs would be useful, but here they are anyway-

[Info  - 5:07:38 PM] Pylance language server 2020.6.1 starting
[Info  - 5:07:38 PM] Server root directory: c:\Users\Chase\.vscode\extensions\ms-python.vscode-pylance-2020.6.1\server
[Info  - 5:07:38 PM] No configuration file found.
[Info  - 5:07:38 PM] Setting pythonPath for service "test": "C:\Users\Chase\AppData\Local\Programs\Python\Python37-32\python.exe"
[Info  - 5:07:39 PM] stubPath c:\Users\Chase\Desktop\Python Projects\test\typings is not a valid directory.
[Info  - 5:07:39 PM] Assuming Python version 3.7
[Info  - 5:07:39 PM] Assuming Python platform Windows
[Info  - 5:07:39 PM] Searching for source files
[Info  - 5:07:39 PM] Found 1 source file
[Info  - 5:07:39 PM] Background analysis root directory: c:\Users\Chase\.vscode\extensions\ms-python.vscode-pylance-2020.6.1\server
[Info  - 5:07:39 PM] Background analysis started
[FG] parsing: c:\Users\Chase\Desktop\Python Projects\test\test.py (31ms)
[FG] parsing: c:\Users\Chase\.vscode\extensions\ms-python.vscode-pylance-2020.6.1\server\typeshed-fallback\stdlib\2and3\builtins.pyi (377ms)
[FG] binding: c:\Users\Chase\.vscode\extensions\ms-python.vscode-pylance-2020.6.1\server\typeshed-fallback\stdlib\2and3\builtins.pyi (156ms)
[FG] binding: c:\Users\Chase\Desktop\Python Projects\test\test.py (2ms)
[BG] analyzing: c:\Users\Chase\Desktop\Python Projects\test\test.py ...
[BG]   parsing: c:\Users\Chase\Desktop\Python Projects\test\test.py (169ms)
[BG]   parsing: c:\Users\Chase\.vscode\extensions\ms-python.vscode-pylance-2020.6.1\server\typeshed-fallback\stdlib\2and3\builtins.pyi (380ms)
[BG]   binding: c:\Users\Chase\.vscode\extensions\ms-python.vscode-pylance-2020.6.1\server\typeshed-fallback\stdlib\2and3\builtins.pyi (146ms)
[BG]   binding: c:\Users\Chase\Desktop\Python Projects\test\test.py (1ms)
[BG]   checking: c:\Users\Chase\Desktop\Python Projects\test\test.py ...
[BG]     parsing: c:\Users\Chase\.vscode\extensions\ms-python.vscode-pylance-2020.6.1\server\typeshed-fallback\stdlib\3\typing.pyi (78ms)
[BG]     binding: c:\Users\Chase\.vscode\extensions\ms-python.vscode-pylance-2020.6.1\server\typeshed-fallback\stdlib\3\typing.pyi (39ms)
[BG]     parsing: c:\Users\Chase\.vscode\extensions\ms-python.vscode-pylance-2020.6.1\server\typeshed-fallback\stdlib\2and3\_typeshed\__init__.pyi (18ms)
[BG]     binding: c:\Users\Chase\.vscode\extensions\ms-python.vscode-pylance-2020.6.1\server\typeshed-fallback\stdlib\2and3\_typeshed\__init__.pyi (3ms)
[BG]   checking: c:\Users\Chase\Desktop\Python Projects\test\test.py (187ms)
[BG] analyzing: c:\Users\Chase\Desktop\Python Projects\test\test.py (890ms)
[FG] parsing: c:\Users\Chase\.vscode\extensions\ms-python.vscode-pylance-2020.6.1\server\typeshed-fallback\stdlib\3\typing.pyi (68ms)
[FG] binding: c:\Users\Chase\.vscode\extensions\ms-python.vscode-pylance-2020.6.1\server\typeshed-fallback\stdlib\3\typing.pyi (36ms)
[FG] parsing: c:\Users\Chase\.vscode\extensions\ms-python.vscode-pylance-2020.6.1\server\typeshed-fallback\stdlib\2and3\_typeshed\__init__.pyi (23ms)
[FG] binding: c:\Users\Chase\.vscode\extensions\ms-python.vscode-pylance-2020.6.1\server\typeshed-fallback\stdlib\2and3\_typeshed\__init__.pyi (8ms)

Code Snippet / Additional information

from typing import Dict

def foo(spam, dictval: Dict):
    print(dictval)
    return "Done"

print(f"{foo(0, {'bar' : 1, 'baz': 2})}")

Output after python ./test.py in the commandline-

{'bar': 1, 'baz': 2}
Done

The code doesn't actually cause a syntax error as you can see. But Pylance reports syntax error-

It also shows a parameter missing error, however that's certainly a side effect of the syntax error-

[erictraut]

Thanks for the bug report. Pylance was not correctly handling nested braces within an f-string expression. It is now working. The fix will be in an upcoming release of Pylance.

[jakebailey]

This issue has been fixed in version 2020.7.0, which we've just released. You can find the changelog here: https://github.com/microsoft/pylance-release/blob/master/CHANGELOG.md#202070-9-july-2020