Markdown front matter is not parsed if the last value is omitted

[kachkaev]

Prettier 1.18.2
Playground link

--parser markdown

Input:
a few spaces after b

---
a:    42
b:    
---

content

Output:
no spaces after b

---
a: 42
b:
---

content

Second Output:

SyntaxError: Implicit map keys need to be followed by map values (2:1)
  1 | a: 42
> 2 | b:
    | ^^

Expected behavior:

b:\n--- is parsed just as b: \n--- or b: ~\n---

Swapping a and b (i.e. making so that the last line in YAML has value) helps avoid the exception. Also the same yaml in a separate file is formatted without problems.

[y9c]

Also format in the wrong way when there is a empty line in the block.

input

---
a:  42
b:  43
 
---

# test

Output:

---
a: 42
b: 43

---#test

[thorn0]

The original issue seems to be gone.

@yech1990 please use the playground to reproduce your issue. I can't reproduce it.

[y9c]

@thorn0 sorry about that.
I got this error when using version 1.19. After upgrading prettier into version 2.0, it works properly now.

[thorn0]

Glad to hear that.