Rust, 4 bytes

"'"'

Expecting this to be an easy crack, probably. No compiler flags allowed.

Disallowed characters:

"'/

Themoonisacheese's crack using a shebang, revised disallowed characters:

#"'/

Rust, 4 bytes, cracked by Themoonisacheese

"'"'

Expecting this to be an easy crack, probably. No compiler flags allowed.

Disallowed characters:

"'/

Themoonisacheese's crack using a shebang, revised disallowed characters:

#"'/

Rust, 4 bytes

"'"'

Expecting this to be an easy crack, probably. No compiler flags allowed.

Disallowed characters:

"'/

Rust, 4 bytes

"'"'

Expecting this to be an easy crack, probably. No compiler flags allowed.

Disallowed characters:

"'/

Themoonisacheese's crack using a shebang, revised disallowed characters:

#"'/