https://ghc.haskell.org/trac/ghc/ticket/12136

https://ghc.haskell.org/trac/ghc/ticket/12136 のバグを直した話 @ #hasmoku

Transcript

1.  4*("#35 PO SJHIUTIJGU PQFSBUJPO BHBJOTU MPOH OFHBUJWF JOUFHFS  ()$ IBTNPLV %BJTIJ /BLBKJNB 
2. ࢲͷ஌ࣝϨϕϧ ▶ গ͠ ()$ ͷίʔυಡΈ࢝Ίͨ ▶ ීஈ͸ $ ͱ͔ॻ͔ͳ͍
3. *TTVF ▶ 4*("#35 PO SJHIUTIJGU PQFSBUJPO BHBJOTU MPOH OFHBUJWF JOUFHFS Y *OUFHFS Y     bTIJGU-b   NBJO  QSJOU  Y bTIJGU3b   1SPHSBN SFDFJWFE TJHOBM 4*("#35 "CPSUFE
4. "CPVU SJHIU TIJGUJOH OFHBUJWF OVNCFS αϯϓϧ ▶  ▶   ▶   ͷิ਺දݱ ▶ TIJGU3  Λద༻ɺࢉज़γϑτ ▶  r  ▶ TIJGU3  ▶  r 
5. ූ߸ CJU Λ࢖Θͳ͍৔߹ ▶   ▶ TIJGU3  ਖ਼ͷ਺ͱͯ͠ ▶   r  ▶ TIJGU3  ▶   r  TIJGUFE PVU ▶ BEE  γϑτΞ΢τ͕ൃੜͨ͠৔߹  Λ଍͢ ▶   r 
6. 1SPCMFN ▶ (.1 Λ࢖͍ͬͯΔ ▶ (.1@-*.#@#*54 ୯ҐͰ CJU Λ֬อ͍ͯ͠Δ ▶ (.1@-*.#@#*54 ୯ҐҎ্Ͱ STIJGU ͍ͨ͠͞ʹ੾Γ٧ΊΔ ▶ (.1@-*.#@#*54 ͷഒ਺Ͱӈγϑτ࣌ɺܻ਺੾Γ٧Ί ʮTIJGUFE PVU ࣌ ͷ BEE  Ͱ DBSSZ PVUʯͰ BCPSU
7. FYBNQMF ▶ (.1@-*.#@#*54   ͱԾఆ ▶  UXPT DPNQMFNFOU  ▶ TIJGU3  ▶  TIJGUFE PVU ▶  SFEVDF CJUT ▶ BEE  ▶   DBSSZ PVU ▶ BCPSU
8. 'JY ▶ 'JY UIF SJHIUTIJGU PQFSBUJPO GPS OFHBUJWF CJH JOUFHFST pYFT  ▶ ্ه৚݅Ͱ -*.# Λ  ͭଟ֬͘อ