Weird crash in glLinkProgram()

fragment shader

varying highp vec2 v_TexCoordinate;
uniform sampler2D u_Texture[2];
uniform highp vec3 u_set1;
uniform highp vec3 u_set2;
uniform highp vec2 img_size;
void main ()
{
  highp float lb_1;
  highp float lc_2;
  highp float ld_3;
  highp float lf_5;
  highp vec4 lg_6;
  highp vec4 lh_7;
  highp vec4 li_8;
  highp vec4 lj_9;
  lowp float lk_10;
  lowp vec2 ll_11;
  highp vec4 lm_12;
  highp vec2 ln_13;
  ln_13 = v_TexCoordinate;
  highp vec4 lo_14;
  lo_14.xy = u_set1.xy;
  lo_14.z = u_set2.x;
  lo_14.w = u_set2.y;
  lm_12 = ((2.0 * lo_14) * lo_14);
  lowp vec2 lp_15;
  lp_15 = ((texture2D (u_Texture[1], v_TexCoordinate).xy * 2.0) - 1.0);
  lowp vec2 lq_16;
  lq_16.x = lp_15.y;
  lq_16.y = -(lp_15.x);
  ll_11 = lq_16;
  lowp vec2 lr_17;
  lr_17 = abs(lq_16);
  lowp float ls_18;
  if ((lr_17.x > lr_17.y)) {
    ls_18 = lr_17.x;
  } else {
    ls_18 = lr_17.y;
  };
  lowp float lt_19;
  lt_19 = (1.0/(ls_18));
  lk_10 = lt_19;
  ll_11 = (lq_16 / img_size);
  lowp vec3 lu_20;
  lu_20 = texture2D (u_Texture[0], v_TexCoordinate).xyz;
  highp vec4 lv_21;
  lv_21 = lu_20.xxxx;
  lj_9 = lv_21;
  highp vec4 lw_22;
  lw_22 = lu_20.yyyy;
  li_8 = lw_22;
  highp vec4 lx_23;
  lx_23 = lu_20.zzzz;
  lh_7 = lx_23;
  lg_6 = vec4(1.0, 1.0, 1.0, 1.0);
  highp float ly_24;
  ly_24 = lo_14.x;
  if ((u_set1.y > u_set1.x)) {
    ly_24 = lo_14.y;
  };
  if ((u_set2.x > ly_24)) {
    ly_24 = lo_14.z;
  };
  if ((u_set2.y > ly_24)) {
    ly_24 = lo_14.w;
  };
  lf_5 = (2.0 * ly_24);
  for (lowp float le_4 = lt_19; le_4 <= lf_5; le_4 = (le_4 + lk_10)) {
    lowp vec4 lz_25;
    lz_25 = exp(((
      -(le_4)
     * le_4) / lm_12));
    lg_6 = (lg_6 + (2.0 * lz_25));
    lowp vec3 lab_26;
    lab_26 = texture2D (u_Texture[0], (ln_13 - (le_4 * ll_11))).xyz;
    lowp vec3 lbb_27;
    lbb_27 = texture2D (u_Texture[0], (ln_13 + (le_4 * ll_11))).xyz;
    lj_9 = (lj_9 + (lz_25 * (lab_26.xxxx + lbb_27.xxxx)));
    li_8 = (li_8 + (lz_25 * (lab_26.yyyy + lbb_27.yyyy)));
    lh_7 = (lh_7 + (lz_25 * (lab_26.zzzz + lbb_27.zzzz)));
  };
  lj_9 = (lj_9 / lg_6);
  li_8 = (li_8 / lg_6);
  lh_7 = (lh_7 / lg_6);
  highp float lcb_28;
  lcb_28 = (lj_9.x - (u_set1.z * lj_9.y));
  ld_3 = lcb_28;
  highp float ldb_29;
  ldb_29 = (li_8.x - (u_set1.z * li_8.y));
  lc_2 = ldb_29;
  highp float leb_30;
  leb_30 = (lh_7.x - (u_set1.z * lh_7.y));
  lb_1 = leb_30;
  highp vec3 lfb_31;
  lfb_31.x = lcb_28;
  lfb_31.y = ldb_29;
  lfb_31.z = leb_30;
  highp float lgb_32;
  lgb_32 = lfb_31.x;
  if ((ldb_29 < lcb_28)) {
    lgb_32 = lfb_31.y;
  };
  if ((leb_30 < lgb_32)) {
    lgb_32 = lfb_31.z;
  };
  ld_3 = (lj_9.z - (u_set2.z * lj_9.w));
  lc_2 = (li_8.z - (u_set2.z * li_8.w));
  lb_1 = (lh_7.z - (u_set2.z * lh_7.w));
  highp vec3 lhb_33;
  lhb_33.x = ld_3;
  lhb_33.y = lc_2;
  lhb_33.z = lb_1;
  highp float lib_34;
  lib_34 = lhb_33.x;
  if ((lc_2 < ld_3)) {
    lib_34 = lhb_33.y;
  };
  if ((lb_1 < lib_34)) {
    lib_34 = lhb_33.z;
  };
  highp vec2 ljb_35;
  ljb_35.x = lgb_32;
  ljb_35.y = lib_34;
  mediump vec4 lkb_36;
  lkb_36.zw = vec2(0.0, 1.0);
  lkb_36.xy = ((ljb_35 + 1.0) / 2.0);
  gl_FragColor = lkb_36;
}

vertex shader

attribute vec4 a_Position;
attribute vec4 a_TexCoordinate;
varying vec2 v_TexCoordinate;
void main()
{
    gl_Position = a_Position;
    v_TexCoordinate = a_TexCoordinate.xy;
}