ghc -e sometimes spills control characters into its output
The behaviour depends on the TERM variable. For example,
# TERM=xterm ghc -e 'return ()' | od -a
0000000 esc [ ? 1 0 3 4 h
0000010
Workaround: unset the TERM variable.
Analysis: Those control characters are emitted by libreadline on initialisation. They enable the terminal's meta mode.
Trac metadata
Trac field | Value |
---|---|
Version | 6.8.2 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | GHCi |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture | Unknown |