Bug numbers refer to the BTS at http://pari.math.u-bordeaux.fr/Bugs/
Done for version 2.11.1 (released 1/12/2018):
Fixed
1- heap-buffer-overflow in init_prefix [readline] [F4]
2- mfsplit(mf,,flag) could return uninitialized objects => SEGV [F5]
3- mfeisenstein(k,,chi) was treated as E(k,chi) instead of E(k,1,chi)[F6]
4- poldegree(y/x) -> 0 [ instead of -1 ] [F7]
5- sumeulerrat(y/x^2,1) -> junk [F8]
HC 6- incgam(-1000.4,2) -> SEGV [F9]
7- mfatkininit(mfinit([366,2]),2) -> precision error [F10]
8- forprimestep: wrong when wrapping over word boundary [#2071] [F11]
9- mfbracket: [f,g]_m was multiplied by (-1)^m [F12]
10- wrong results in mfatkininit / mfatkineigenvalues [#2073/#2074] [F13]
11- issquare(Mod(x,ffinit(3,2))) -> wrong result [broken Fq_ispower] [F14]
12- possible SEGV in rnfpseudobasis(, [pol,lim]) [F15]
13- wrong result in elllog over F_p, p in [2^63,2^64[ [F16]
14- wrong result in mfsymboleval when path extremities are close to [F17]
real axis (cusps were OK) [#2075]
15- mfcoefs(mfDelta(),0) -> SEGV [#2078] [F18]
16- GC error in lfuncreate(elliptic curve over number field) [#2080] [F19]
17- X11 and Qt graphic engine: pari_close called too soon => crash [F20]
18- pariold.h: mix up with obsoleted taille / taille2 [F21]
19- foo(n)=vector(n)[1..n];123; would corrupt the GP interpreter [F22]
20- Pol(0)/'x -> t_INT 0 (instead of 0*x^0) [F23]
Pol(0)/(Mod(1,2)*'x) -> t_INT 0 (instead of Mod(0,2)*x^0)
21- missing typecheck in nfalgtobasis [#2084] [F24]
22- dbllog2(t_COMPLEX of t_FRAC) => junk [F25]
23- nffactor(t_POL, t_POL) => bug in LLL_cmbf [#2083] [F26]
24- ideallog(pure archimedean conductor, t_FRAC) -> log(0) error [F27]
25- lfunrootres: avoid oo-loop [F28]
26- mfgaloistype: dihedral forms possibly incorrect for N > 3000 [F29]
27- mfgaloistype: error on mf=mfinit([1159,1,Mod(930,1159)],0); [F30]
28- hash_GEN(x) differed depending on whether x was a clone [F33]
BA 29- [mpi] setting nbthreads in .gprc could lead to crashes. [F34]
30- accuracy too large in derivnum => slowdown [F35]
31- nfisincl(x^5-x^4+x^3-2*x^2+3*x-1,x^20+x^15+x^10+x^5+1) -> SEGV [F36]
32- stack corruption in addsub_frac [F37]
AP 33- segfault in rnfidealup [#2093] [F38]
34- Ser(x,x,0) -> error instead of O(x) [#2092] [F39]
35- fix mspolygon(,2) [add 1/3rd hyperbolic triangles + fix labels] [F40]
36- factor(3/(x^5+3*y*x^4+3*y^2*x^3+y^3*x^2)) -> SEGV [F41]
37- catastrophic cancellation in acosh / asinh for large t_COMPLEX [F43]
38- zeta(1/2 + I*t) => internal error [F44]