Understanding the problem

• 1. diff -r Constant_Success/ Intermittent_Success/
• 2. cd Constant_Success/major/; ./b.sh
• 3. cd Intermittent_Success/major/; ./b.sh

Intermittent_Success fails non-deterministically with

(ins)[user@pc major]$ ./b.sh 
STEP 1
/home/user/dev/git/zi/ZigCacheIssue_MinExample/Intermittent_Success/major/major.zig:1:27: error: no package named 'minor' available within package 'root'
pub const minor = @import("minor");
                          ^~~~~~~
referenced by:
    Foo: /home/user/dev/git/zi/ZigCacheIssue_MinExample/Intermittent_Success/major/major.zig:2:17
    Foo: /home/user/dev/git/zi/ZigCacheIssue_MinExample/Intermittent_Success/major/src/alpha.zig:7:18
    remaining reference traces hidden; use '-freference-trace' to see all reference traces

error: test...
error: The following command exited with error code 1:
/home/user/dev/git/zi/zig/master/build/stage3/bin/zig test /home/user/dev/git/zi/ZigCacheIssue_MinExample/Intermittent_Success/major/main_test.zig --cache-dir /home/user/dev/git/zi/ZigCacheIssue_MinExample/Intermittent_Success/major/zig-cache --global-cache-dir /home/user/.cache/zig --name test --pkg-begin major /home/user/dev/git/zi/ZigCacheIssue_MinExample/Intermittent_Success/major/major.zig --pkg-begin minor /home/user/dev/git/zi/ZigCacheIssue_MinExample/Intermittent_Success/minor/minor.zig --pkg-end --pkg-en d --enable-cache 
error: the following build command failed with exit code 1:
/home/user/dev/git/zi/ZigCacheIssue_MinExample/Intermittent_Success/major/zig-cache/o/552a17303a3cfe25f45a59a25ba92fda/build /home/user/dev/git/zi/zig/master/build/stage3/bin/zig /home/user/dev/git/zi/ZigCacheIssue_MinExample/Intermittent_Success/major /home/user/dev/git/zi/ZigCacheIssue_MinExample/Intermittent_Success/major/zig-cache /home/user/.cache/zig test

Problem description:

Constant_Success
Constant_Success/major/b.sh
Constant_Success/major/build.zig
Constant_Success/major/main_test.zig
Constant_Success/major/major.zig
Constant_Success/major/src/alpha.zig
Constant_Success/minor/build.zig
Constant_Success/minor/main_test.zig
Constant_Success/minor/minor.zig
Constant_Success/minor/src/foo.zig

and for Intermittent_Sucess same structure but + Intermittent_Success/major/src/beta.zig and this diff:

diff -r Constant_Success/major/main_test.zig Intermittent_Success/major/main_test.zig
2a3
>     _ = @import("src/beta.zig");
diff -r Constant_Success/major/major.zig Intermittent_Success/major/major.zig
2a3
> pub const beta = @import("src/beta.zig").beta;
Only in Intermittent_Success/major/src: beta.zig.

beta.zig does const major = @import("../major.zig"); const Foo = major.Foo; and uses both const major and const Foo forwarded via pub const Foo = @import("src/foo.zig").Foo; via minor.zig.

Lets abbreviate major as ma minor as mi with the filename to simplify drawing the graph how things are imported and remove file ending .zig to descibre its namespace only (but add the path info). It would be nice, if we would have a graph output of the problem, because writing this takes a long time. Only describe usage for possible resolving paths ignoring std.

Constant_Sucess:

ma/build
pkg ma (ma/ma), mi(mi/mi)
ma/main_test ─► ma/src/alpha ─► ma/ma ─► Foo = mi/mi.Foo ─► mi/mi.Foo = mi/src/foo.Foo ─► mi/src/foo: pub fn Foo

Intermittent_Success:

ma/build                             ┌────┐
pkg ma (ma/ma), mi(mi/mi)            │    ▼
ma/main_test ┬► ma/src/alpha ─► ma/ma│┬► Foo = mi/mi.Foo ─► mi/mi.Foo = mi/src/foo.Foo ─► mi/src/foo: pub fn Foo
             │                       │└► beta = src/beta.beta
             │                       └─────┐             │
             │                             │             │
             │                             │             ▼
             └► ma/src/beta ─► Foo = ma/ma.Foo, pub fn beta
                                ▲                        │using Foo internally
                                └────────────────────────┘

Further observation: Adding pub const alpha = @import("src/alpha.zig").alpha to Intermittent_Success/major/major.zig does not create an error message such that ma/src/alpha.alpha does not exist.